JP5284552B1 - Architectural shutter opening and closing machine - Google Patents

Abstract

The present invention provides an architectural shutter opening / closing device that has the function of an automatic closing device and can simplify installation work and the like without increasing the size of the opening / closing device.
A brake unit 4 of an opening / closing machine includes a brake shaft 12 provided so as to be movable by a predetermined distance in an axial direction, and a brake spring 14 that urges the brake shaft to move in a direction in which a braking force is generated. . In addition, a brake release lever 21 provided on one end side of the brake shaft and a keep solenoid 22 disposed in the case of the brake portion are provided. When the keep solenoid is attracted, the brake release lever is arranged around the support shaft 24 in one direction a. The brake shaft rotates to move in the braking release direction c against the urging force of the brake spring, maintains the braking release state when the keep solenoid is attracted, and the brake release lever by the urging force of the brake spring when the keep solenoid is restored Rotates around the spindle in the other direction b, and the brake shaft moves in the braking direction d.
[Selection] Figure 2

Description

  The present invention relates to an opening / closing device for a building shutter provided at a doorway or an opening of a building, and particularly relates to a device equipped with a function of an automatic closing device that automatically lowers and closes a shutter 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 A mounted shutter box, a pair of left and right guide rails mounted 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 100 and a brake unit 110 (both see FIG. 5) in the axial direction from the output shaft side. In this case, the brake unit 110 is described in the above-described Patent Document 1 and, as shown in FIG. 5, a brake shoe 111 that is rotatably coupled to the motor shaft 101 of the motor unit 100 and a predetermined axial direction. A brake shaft 112 that is slidable by a distance, a brake drum 113 that is rotatably coupled to one end of the brake shaft 112 and faces the brake shoe 111 in the axial direction, and an outer periphery of the brake shaft 112 A brake spring 114 that constantly urges the brake shaft 112 and the brake drum 113 to move in a direction in which the brake drum 113 is in pressure contact with the brake shoe 111, and a side of the brake drum 113 that faces the brake shoe 111. Electromagnetic clutch 1 arranged on the opposite side And a 5. When the electromagnetic clutch 115 is not energized, the brake shaft 110 is pressed against the brake shoe 111 by pressing the brake shaft 112 and the brake drum 113 closer to the motor unit 100 by the urging force of the brake spring 114, whereby the brake unit 110 is Then, the braking force is generated to the motor shaft 101 of the motor unit 100, and the motor shaft 101 and the output shaft of the switch (deceleration unit) are stopped. On the other hand, when the electromagnetic clutch 115 is energized, the brake shaft 112 and the brake drum 113 are moved away from the motor unit 100 against the urging force of the brake spring 114 by the magnetic force of the electromagnetic clutch 115, and the brake drum 113 and the brake shoe are moved. By releasing the pressure contact with 111, the brake unit 110 is turned off (that is, the brake is released), and the motor shaft 101 can be rotated by energizing the motor unit 100.

  The brake unit 110 further includes a brake release lever 116 attached to the other end of the brake shaft 112, and an automatic closing device is provided on the upper surface of the brake case 117 corresponding to the brake release lever 116. 120 is attached.

  The brake release lever 116 penetrates the brake shaft 112, and includes a first portion 116a and a second portion 116b that are divided with the brake shaft 112 as a boundary. A first bent portion 116c is formed in the first portion 116a, and a second bent portion 116d is formed in the second portion 116b. When the slide member 121 of the automatic closing device 120 applies a load to the first portion 116a of the brake release lever 116 in the direction a, that is, the side opposite to the motor unit 100 side, the entire brake release lever 116 is bent in the second direction. Since the portion 116d swings in the direction a with the fulcrum 116d as a fulcrum, the brake shaft 112 and the brake drum 113 move in the same direction as the direction a. For this reason, the brake unit 110 can be turned off without energizing the electromagnetic clutch 115.

  On the other hand, the automatic closing device 120 turns off the brake unit 110 by operating the slide member 121 in the protruding direction based on the signal of the sensor when the sensor detects heat or smoke in the event of a fire. The shutter curtain with the doorway open is lowered by its own weight to close the doorway to prevent fire and smoke. Various automatic closing devices have been proposed and put into practical use. For example, in the above-described Patent Document 1, the slide member 121 is automatically operated using a solenoid or the like to release the brake 110, and the operation wire is used to brake the brake 110 by remote manual operation. A description is given of a release operation and a return operation for returning to the original state after the braking of the brake unit 110 is released. Japanese Patent Laid-Open No. 2004-26883 also includes an electric motor as an actuator different from the solenoid, and operates the slide member 121 to release the brake 110 and to return to the original state after the brake is released. It describes what can be done automatically.

JP 2013-49948 A Japanese Patent No. 4820241

  The conventional automatic closing device 120 is an external type that is attached to the outside of the brake unit 110 of the opening / closing machine. From the viewpoint of simplifying the installation work of the opening / closing machine and the architectural shutter. There is a demand to store the automatic closing device inside the opening / closing machine.

  However, since the conventional automatic closing device 120 is mechanically complicated, there is a problem that when the switch is directly arranged inside the switch, the switch itself becomes large. In particular, as the automatic closing device 120, it is excellent in terms of convenience that it can automatically perform the brake release and the return operation for returning to the original state after the brake release as described in Patent Document 2. Since this type of automatic closing device uses both a solenoid and an electric motor as an actuator, the above problem is significant.

  The present invention has been made in view of such a point, and the object of the present invention is to drastically change the configuration of a conventional brake release lever and to use a keep solenoid that is a self-holding solenoid. Provided with a function of an automatic closing device that automatically performs brake release and return operation without causing an increase in the size of the opening and closing device, a switch with a built-in automatic closing device is provided, thereby simplifying installation work and The aim is to provide an architectural shutter opener that can reduce costs.

  In order to solve the above-mentioned problem, the invention according to claim 1 is 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 a brake shaft 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 a direction in which a braking force is generated are provided. And it consists of a pair of leg portions extending so as to sandwich one end portion of the brake shaft, and a connecting portion for connecting one end portions of the pair of leg portions, and the other end portions of the leg portions are respectively outwardly directed to each other. And a support shaft that pivotably fits into a support recess formed in the case of the brake portion and an engagement portion that protrudes inward and engages with the outer peripheral surface of the brake shaft. The release lever and a keep solenoid disposed in the case of the brake part, the tip of the plunger being connected to the connection part of the brake release lever via a connecting member, and releasing the brake when the keep solenoid is sucked The lever rotates in one direction around the support shaft, and the brake shaft moves in the braking release direction against the biasing force of the brake spring. And holding the braking open, rotated by the biasing force of the brake spring when the keep solenoid recovery in the other direction the brake release lever to pivot around the brake shaft is arranged to move in the braking direction.

  In this configuration, when the keep solenoid is attracted and attracted, the brake release lever rotates in one direction around the support shaft and the brake shaft moves in the braking release direction against the urging force of the brake spring. The state is maintained, and the automatic closing device is automatically released from braking. When the keep solenoid is restored, the brake release lever rotates in the other direction around the support shaft by the urging force of the brake spring, and the brake shaft moves in the braking direction. To be done.

  In addition, the configuration of the brake release lever is changed from the conventional one in terms of configuration, and the keep solenoid is only arranged in the case of the brake part for the rotation operation of the brake release lever. Implementation of the machine can be facilitated without increasing the size of the machine. Further, it is not necessary to perform an operation such as attaching an automatic closing device to a switch as in the case of a conventional external automatic closing device at the time of installing a building shutter, and the installation work can be simplified correspondingly.

  The invention according to claim 2 provides a preferable mode of the brake release lever in the construction shutter opening and closing device according to claim 1. That is, the brake release lever has a substantially U-shape in which a pair of leg portions and a connecting portion are integrally formed. In this configuration, since the pair of leg portions and the connecting portion are integral with each other, the number of parts can be reduced accordingly.

  As described above, according to the construction shutter opening and closing machine according to the present invention, the brake opening / returning operation of the automatic closing device is automatically performed by the suction, adsorption and recovery of the keep solenoid arranged in the case of the brake unit. Therefore, it is not necessary to perform an operation such as attaching an automatic closing device to a switch when installing a building shutter like a conventional external type automatic closing device, and simplifies the installation work accordingly. be able to. In addition, since the configuration for automatically performing the operation of the automatic closing device is simple and the number of parts is small, the implementation can be easily realized in terms of cost without increasing the size of the switch. .

  In particular, in the invention according to claim 2, since the brake release lever has a pair of leg portions and a connecting portion, the number of parts can be reduced accordingly, which contributes to cost reduction. Can do.

FIG. 1 is a side view of a construction shutter opening and closing device according to an embodiment of the present invention. FIG. 2 is a longitudinal side view of the vicinity of the brake portion of the switch. FIG. 3 is an arrow view seen from the X direction of FIG. 4 is a view corresponding to FIG. 3, showing a state in which a keep solenoid or the like is removed from the state shown in FIG. FIG. 5 is a view corresponding to 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 an architectural shutter opening / closing device according to an embodiment of the present invention. The opening / closing machine A is attached to the inner surface of the side plate of the shutter box, and has an output shaft 1 on the attachment surface side, and a speed reduction unit 2, a motor unit 3, a brake in the axial direction from the output shaft 1 side. The unit 4 and the control unit 5 are connected. In the case of the present embodiment, the output shaft 1 is equipped with a sprocket 6 and transmits the rotational force to the take-up shaft (both not shown) via the sprocket 6 and the chain. Alternatively, the rotational force may be transmitted to the take-up shaft via other power transmission means.

  As shown in FIG. 2, the brake part 4 is provided so as to be slidable by a predetermined distance in the axial direction with a brake shoe 11 rotatably coupled to the motor shaft 10 of the motor part 3 as in the conventional example. The brake shaft 12, a brake drum 13 which is coupled to one end portion of the brake shaft 12 and is axially opposed to the brake shoe 11, and an outer periphery of the brake shaft 12, and the brake shaft 12 and the brake shaft. A brake spring 14 that constantly urges the drum 13 to move in a direction in which the brake drum 13 is in pressure contact with the brake shoe 11, and an electromagnetic wave disposed on the opposite side of the brake drum 13 that faces the brake shoe 11. And a clutch 15. When the electromagnetic clutch 15 is not energized, the brake unit 4 is pressed against the brake shoe 11 by pressing the brake shaft 12 and the brake drum 13 toward the motor unit 3 by the urging force of the brake spring 14, so that the brake unit 4 is Then, the braking force is generated to the motor shaft 10 of the motor unit 3, and the motor shaft 10 and thus the output shaft 1 of the switch A 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 unit 3 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 unit 4 is turned off (that is, the brake is released), and the motor shaft 10 can be rotated by energizing the motor unit 3.

  As a feature of the present invention, as shown in FIGS. 2 and 3, the brake unit 4 further includes the other end of the brake shaft 12 (the end opposite to the end to which the brake drum 13 is coupled). The brake release lever 21 provided on the part side) and a keep solenoid 22 disposed in the brake case 16 corresponding to the brake release lever 21 are provided.

  As shown in FIG. 4, the brake release lever 21 includes a pair of left and right leg portions 21a and 21a extending so as to sandwich the other end portion of the brake shaft 12, and one end portions of the pair of leg portions 21a and 21a. It consists of the connection part 21b to connect. In the case of the present embodiment, the brake release lever 21 is formed integrally with a pair of leg portions 21a, 21a and a connecting portion 21b which are bent into a substantially U shape by a strip-shaped steel plate. The other end of each leg 21a (the end opposite to the connecting portion 21b) protrudes outward from each other and is rotatably fitted in a support recess 23 formed in the partition wall 16a of the brake case 16. A supporting shaft 24 to be engaged with each other and an engaging pin 26 as an engaging portion that protrudes inward from each other and engages with a flange member 25 attached to the outer peripheral surface of the brake shaft 12 are provided.

  Although not shown in detail in the figure, the keep solenoid 22 incorporates a permanent magnet in a part of the magnetic circuit. The plunger 22a is attracted only by passing an instantaneous current, and is held even if the current is cut off. It is a self-holding solenoid that recovers when a reverse current is applied instantaneously. The keep solenoid 22 is attached to the partition wall portion 16a of the brake case 16 with an attachment plate 27 with the plunger 22a facing upward, and the tip of the plunger 22a of the keep solenoid 22 is connected to a hook-like connection. It is connected to the connecting portion 21 b of the brake release lever 21 via a member 28.

  2 and 3, reference numeral 31 denotes a micro switch for detecting the operation state of the plunger 22a of the keep solenoid 22 from contact with the solenoid pin 32 that couples the plunger 22a and the connecting member 28. The signal 31 is input to the controller 5 of the switch A. 33 is a manual operation wire for manually rotating the brake release lever 21 around the support shaft 24 in the brake release direction a in the event of a power failure, and 34 is also used to rotate the brake release lever 21 around the support shaft 24 in the event of a power failure. A manual return wire for manually rotating the brake in the braking return direction b. The manual return wire 34 extends obliquely upward from the connection point with the brake release lever 21 and is attached to the inner surface of the brake case 16. After passing through the member 35, the member 35 extends outward from the brake case 16.

  Next, the operation of the opening / closing device A, particularly the operation of the brake unit 4 at the time of suction, adsorption and recovery of the keep solenoid 22, will be described. The plunger 22a of the keep solenoid 22 is shown in FIG. 2 and FIG. When the state changes from the protruding state indicated by phantom to the attracted state indicated by the phantom line, that is, when the keep solenoid 22 is attracted, the brake release lever 21 moves in the braking release direction (counterclockwise in FIG. 2) a around the support shaft 24. The brake shaft 12 is released from braking against the urging force of the brake spring 14 by an external force acting in a direction away from the motor unit 3 from the engagement pin 26 of the brake release lever 21 to the brake shaft 12 by rotating. Moving in the direction c, the brake unit 4 is turned off in the same manner as when the electromagnetic clutch 15 is energized.

  Further, when the keep solenoid 22 is attracted, the plunger 22a of the keep solenoid 22 is sucked and held, so that the brake unit 4 is kept in an off state, that is, a brake released state.

  Further, when the keep solenoid 22 is restored, the brake release lever 21 is rotated around the support shaft 24 in the braking direction or the braking return direction (clockwise in FIG. 2) b by the urging force of the brake spring 14 and the brake shaft 12. Moves in the braking direction or the braking return direction d, and the brake unit 4 is turned on to generate a braking force to the motor unit 3.

  As described above, in the opening / closing machine A, each of the brake release and brake return operations of the automatic closing device can be automatically performed by the suction, adsorption and recovery of the keep solenoid 22 arranged in the brake case 16. There is no need to perform an operation such as attaching the automatic closing device to the switch A when installing the architectural shutter as in the case of a conventional external automatic closing device, and the installation work can be simplified correspondingly.

  In addition, the configuration of the brake release lever 21 is changed compared to the conventional one, and the keep solenoid 22 is simply disposed in the brake case 16 for the rotation operation of the brake release lever 21. Therefore, the switch A is not increased in size, and can be easily implemented in terms of cost.

  In particular, in the case of the present embodiment, since the brake release lever 21 is formed by integrating the pair of leg portions 21a, 21a and the connecting portion 21b, the number of parts can be reduced correspondingly, and the cost can be reduced. Can contribute.

  In addition, this invention is not limited to the said embodiment, A various other form is included. For example, in the above embodiment, from the viewpoint of reducing the number of parts, the pair of leg portions 21a and 21a and the connecting portion 21b of the brake release lever 21 are integrally formed by bending the belt-shaped steel plate into a substantially U shape. In the invention, the pair of leg portions and the connecting portion of the brake release lever may be configured by separate members.

  In the above embodiment, the switch A is described in which the speed reduction unit 2, the motor unit 3, the brake unit 4, and the control unit 5 are connected in order from the output shaft 1 side in the axial direction. Of course, the present invention can also be applied to the case where the switch is configured separately from the switch and attached to the switch externally.

A Opening and closing machine 1 Output shaft 2 Deceleration part 3 Motor part 4 Brake part 12 Brake shaft 14 Brake spring 16 Brake case 21 Brake release lever 21a Leg part 21b Connection part 22 Keep solenoid 22a Plunger 23 Support recessed part 24 Support shaft 26 Engagement pin (Engagement part)
28 Connecting members

Claims (2)

The speed reduction part, motor part and 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 braking force is generated by this brake shaft. In the shutter opening and closing device for the building, which has a brake spring that is always urged to move in the direction of
The brake shaft includes a pair of leg portions extending so as to sandwich one end portion of the brake shaft and a connecting portion that connects one end portions of the pair of leg portions, and protrudes outward from each other at the other end portions of the leg portions. And a brake release lever provided with a support shaft rotatably fitted in a support recess formed in the case of the brake portion, and an engaging portion that protrudes inward and engages with the outer peripheral surface of the brake shaft. When,
A keep solenoid disposed in the case of the brake part, the tip of the plunger being connected to the connecting part of the brake release lever via a connecting member;
The brake release lever rotates in one direction around the support shaft when the keep solenoid is attracted, and the brake shaft moves in the brake release direction against the biasing force of the brake spring. The brake release lever is rotated in the other direction around the support shaft by the urging force of the brake spring when the keep solenoid is restored, and the brake shaft moves in the braking direction. Shutter opening and closing machine.   2. The architectural shutter opening / closing machine according to claim 1, wherein the brake release lever is a substantially U-shaped member in which a pair of leg portions and a connecting portion are integrally formed.