JP2559210Y2 - Emergency opening device for electric shutter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an emergency opening device of an electric shutter for opening and closing a frontage of a building such as a shutter type shutter which is installed in a normal house.

[0002]

2. Description of the Related Art Today, in buildings such as buildings and stores, general houses and the like, it is customary to use a shutter at an opening of a frontage for the purpose of crime prevention and fire prevention. Although the shutter functions as a crime prevention and fire prevention function, it has a problem that it greatly hinders escape from the building, fire extinguishing, and rescue operations in an emergency. For example, today, the majority of shutters are of the electric type, and various types of emergency brake release devices have been developed for the electric type shutters. When an emergency power supply supplies power to the electromagnetic magnet, a brake release lever for manual operation provided on the magnet is driven, and a brake wheel, which is drivingly connected to an electric motor for winding (rewinding) the shutter, and an electromagnetic magnet side By releasing the pressure contact with the brake lining attached to the vehicle, the shutter was manually operated by manually operating a chain or handle for manual operation, thereby opening the shutter in an emergency.

However, in the structure of the electric shutter, for example, in the event of a power failure including a failure of an emergency power supply in the event of a fire or the like, the electromagnetic magnet does not function at all and the brake release device is operated. As a result, the shutter is kept closed, and there is a problem that it is impossible to escape from the inside of the building in an emergency. In this case, the brake of the shutter can be released by manually operating the brake release lever for manual operation previously mounted on the shutter. It is necessary to manually operate the brake release lever up to the point, and performing the above operation in an emergency such as a fire has a serious problem that may cause personal injury, and its feasibility is difficult. Was.

[0004] In order to solve the above problem, in an emergency, as a means for opening a closed shutter from the outside, for example, a fire hose connection port on an outer wall of a building where an electric shutter is installed is provided. An external power supply inlet is provided and the brake is released by the water supply pressure to forcibly rotate the rotor shaft of the motor, or an external power supply (power supply vehicle) is inserted to operate the electromagnetic magnet to release the brake. Although some are adopted, in any case, in addition to the shutter equipment, many additional equipment and construction is required, there is a problem that the shutter equipment becomes complicated and the equipment itself becomes expensive, for example, The installation of the emergency opening auxiliary equipment on shutter type shutters used for general houses is not costly except for large buildings and stores. There is a problem of installation space, it does not lead to adopt. As a result, in the shutter type shutter, for example, a manual clutch is interposed between the electric motor and the shutter take-up cylinder, the electric motor is disconnected by the clutch operation in an emergency such as a power failure, and the shutter is manually opened. Although it is also possible to operate the clutch, the above-mentioned clutch operation also has to be performed above the ceiling, which is inappropriate as an emergency operation, and the number of parts used such as clutches increases, and The accompanying assembly work also takes time,
There was a problem that the manufacturing cost of electric shutters such as shutter type shutters was increased.

In view of the various problems, the present invention is used as an electric shutter in normal times, and in an emergency such as a power outage, has a simple configuration and does not require any special operation. An object of the present invention is to provide an emergency opening device for an electric shutter that can open a shutter that has been closed in time.

[0006]

According to the present invention, one end of a pull cord is supported on a plunger of an electromagnetic magnet for releasing a brake device installed in a shutter opening / closing device. and telescopically engaging the compression spring to have a predetermined slack, further, at the outer side of the shutter driving device, hanging to maintain the tension state of <br/> the tension rope by hooking the locking tool A stop spring is provided, and the other end of the pull cord is supported by the hook spring . Also, one end of a pull cord is attached to a plunger of an electromagnetic magnet for releasing a brake device installed in the shutter switch, and the other end of the pull cord is pulled and pulled back by a pull cord provided to be vertically movable in the shutter switch. For
The operation rod is attached to the operation rod via a tension spring, and when the operation rod is lowered, the operation rod is locked between the shutter rod and the shutter to maintain the tensioned state of the pull cord. A locking means for releasing the tension state of the pull cord when released; and a tension cord for operating the operating rod on the operating rod.
It is characterized by having been attached .

[0007]

According to the present invention, when the shutter winding motor cannot be operated in an emergency such as a power failure, the plunger of the electromagnetic magnet constituting the brake device is used for pulling back the plunger whose one end is fastened to the plunger. The brake device can be easily released manually by pulling it back to the suction side of the electromagnetic magnet by a pull cord to break the contact with the brake wheel. As a result, even if the electric motor is not energized, the emergency release of the shutter in an emergency can be quickly and reliably performed from outside by releasing the brake device.
In addition, it can be performed safely, and human and physical damage caused by the inability to open the shutter in an emergency can be favorably reduced. In addition, the manual emergency release device of the brake device pulls the pull cord tied to the plunger only in the outward direction, and pulls the pull cord outside the shutter opening / closing device by a locking means for maintaining the tension state of the pull cord. Since the release state of the emergency release device of the device can be held even when the user speaks, the manual release operation of the shutter in an emergency can be safely performed from the outside, and the structure of the brake release device is simplified, A device for manually releasing the brake of the electric shutter can be manufactured easily and economically.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The present invention will be described with respect to an example in which the present invention is applied to an electric shutter used for a window, a garage, or the like of a house. 1 to 3, reference numeral 1 denotes a window 2 of a house.
A shutter opening / closing device of the electric shutter 3 attached to the upper winding chamber 2a, which is housed in the cylindrical case 4. 5
Is the shutter switch (hereinafter simply referred to as switch) 1
Outside of the opening / closing unit 1 is a shutter take-up cylinder which is longer than the switchgear 1 in the axial direction and is rotatably loosely supported / supported to take up the shutter 6.

Next, the detailed structure of the switch 1 will be described with reference to FIG. The shutter opening / closing device 1 includes, from left to right in FIG. 1, a braking device 7, a motor 8, and a rotation transmission device 9 including a plurality of planetary gear groups for reducing the rotation of the motor 8 and rotating the shutter winding cylinder 5. The respective members are arranged in the case 4 in a horizontal line.
As shown in FIG. 4, the brake device 7 includes an electromagnetic magnet 12 in which an electromagnetic coil 11 is wound around an iron core 10.
A guide pin 14 protruding horizontally toward the electric motor 8 from the attraction surface 13 of the iron core 10 of the electromagnetic magnet 12, and moving in the horizontal direction while being engaged with and supported by the guide pin 14;
A plunger 15 that does not rotate in the circumferential direction; a brake wheel 16 that is fixed to the rotor shaft 8a of the electric motor so as to face the plunger 15; and an annular brake that is spread on the brake wheel 16 and that has excellent wear resistance. Lining 17
When the electromagnetic magnet 12 is excited, the plunger 15 is attracted to the attracting surface 13 of the iron core 10 to release the brake device 7, or conversely, the plunger 15 is pressed toward the brake wheel 15 by the pressing spring 15a to generate the electric motor 8 It is provided to apply braking.

Next, as shown in FIG. 1, the electric motor 8 is accommodated between a brake device 7 and a rotation transmission device 9, and one end of a rotor shaft 8a is connected to the brake device 7 and the other end is transmitted to the rotation transmission device. Each is drivably connected to its drive shaft 18 via a device 9. As shown in FIG. 1, the drive shaft 18 of the rotation transmission device 9 is rotatably projected outward from one end of the case 4 and the other end of the case 4 from which the drive shaft 18 does not project ( On the left side of FIG. 1), a bracket 21 having a rectangular locking shaft 26 projecting therethrough is fixed via a bearing member 22 fitted to the outer periphery of the terminal of the case 4.

As shown in FIG. 1, one end of the shutter take-up cylinder 5 loosely fitted and supported on the outside of the case 4 is rotated via a bearing member 22 fitted to the end of the case 4. It is freely supported, and the other end is fixed to a collar 23 fitted through a bearing member 22a inserted into a shaft rod 20 of a spring support member 19 inserted inside the terminal using a set screw or the like. Accordingly, the case 4 is rotatably loosely held on the outer periphery of the case 4 by the interposition of the bearing members 22 and 22a. Next, a case where the case 4 and the shutter winding cylinder 5 are connected will be described. In FIG. 1, a connection wheel 25 slidably in contact with the inner peripheral surface of the shutter take-up cylinder 5 is fixed to a drive shaft 18 protruding from the inside of the case 4 toward the spring support member 19. Torso 5
Is fixed by a set screw or the like, the rotation of the electric motor 8 is transmitted to the shutter winding cylinder 5 via the connecting wheel 25. As shown in FIG. 3, an upper end of a shutter 6 is connected to the
Winding and rewinding.

Further, a rotational force is applied to the space between the connecting wheel 25 and the spring support member 19 in the shutter winding cylinder 5 by rotating the shutter winding cylinder 5 in a direction in which the shutter 6 can be wound. One end of the coil spring 27 is supported by the connecting wheel 25 and the other end thereof is supported by the spring support member 19. In the state where the shutter opening / closing device 1 has the shutter take-up cylinder 5 loosely engaged and held, as shown in FIG. It is inserted into the side wall 28 of the chamber (see FIG. 2) 2a so as not to rotate, and is integrated with the shaft rod 20 of the spring support member 19 that supports one end of the shutter winding cylinder 5 via the bearing member 22a and the collar 23. The non-rotatably inserted rectangular locking shaft 26a is inserted into the other side wall 28a of the winding chamber 2a so that the shutter winding cylinder 5 loosely fits with the shutter opening / closing device 1.
Is that the locking shafts 26, 26a are
a, the rotational force of the shutter opening / closing device 1 can be transmitted favorably via the electric motor 8 → the rotation transmitting device 9 → the drive shaft 18 → the connecting wheel 25. Winding and rewinding of the shutter 6 are smoothly performed by effectively utilizing the rotational force generated when the coil spring 27 to which the torsion effect is applied or the coil spring 27 to which the torsion effect is applied returns to its original state.

Next, an emergency release device 30 for manually releasing the brake device 7 in an emergency will be described. In FIG. 4, reference numeral 31 denotes an electromagnetic magnet 1 made of, for example, high-strength fiber or steel wire mainly composed of glass fiber.
2 is a pull cord for pulling back the plunger 15, one end of which passes through a hole formed in the center of the plunger 15, and is tied in a lump on the brake wheel 16 side so as not to come off from the hole. And the other end of the pull cord 31 is pulled out through a through hole 32 provided at the center of the iron core 10 of the electromagnetic magnet 12 in a state where the terminal side of the case 4 is slightly loosened, and is housed inside the terminal of the case 4. At the position of the placed flat plate 33, a bump-shaped engaging portion 34 is formed, and the flat plate 33 is brought into contact with the flat plate 33.
3 and a compression spring 35 interposed between the flat plate 33 and the wall 4a of the end of the case 4. Then, the tension cable 31 penetrated by the compression spring 35 passes through the through hole 4b drilled in the wall 4a and the outlet 36 opened on the lower side of the bracket 21 to the outside of the shutter opener 1 as shown in FIG. The emergency release device 30 is constituted by the pull cord 31, the flat plate 33, and the compression spring 35. In FIG. 4, reference numeral 37 denotes a hook spring for hooking the pull rope 31 tied to a leading end of the pull rope 31 pulled out from the shutter opening / closing device 1. When the pull rope 31 is pulled, its tension state is shown. Is held by the hook 38 so that the tensioned state can be maintained satisfactorily.

Next, the operation will be described. In a normal state, the electric shutter 3 has the shutter 6 wound around the shutter winding cylinder 5 and is housed in the winding chamber 2 a above the window 2. At this time, in the brake device 7, the plunger 15 of the electromagnetic magnet 12 is moved by the pressing spring 15 a toward the electric motor 8, and the brake lining 17 is pressed against the brake wheel 16 to apply braking to the electric motor 8. That is, the shutter 6 is prevented from naturally descending due to the idling of the electric motor 8. Next, a case where the shutter 6 is driven to lower the shutter 6 in order to close the window 2 with the shutter 6 wound up will be described. When operating the electric shutter 3, first, an operation switch (not shown) installed in the room is turned on. When the operation switch is turned on, the electromagnetic magnet 12 is energized by a command signal from a control device (not shown) incorporated in the electric shutter 3, and the plunger 15 is attracted to the attracting surface 13 against the force of the pressing spring 15a. As a result, the brake lining 17 provided on the plunger 15
Release from the brake wheel 16 and release the brake device 7.

When the brake device 7 is released, a control device (not shown) rotates the electric motor 8 in the normal direction (shutter 6).
A command signal for driving the motor 8 in the direction of rewinding is output, and the electric motor 8 is started. That is, the electric shutter 3 is driven, and the shutter 6 wound on the shutter take-up cylinder 5 is gradually lowered by the rotation of the shutter take-up cylinder 5 in the rewinding direction to close the window portion 2. When the shutter 6 moves down to just before the home position, a sensor or the like (not shown) detects this, and a command signal for stopping the power supply to the electric motor 8 and the electromagnetic magnet 12 is output from the control device. The operation of No. 12 is stopped. When the power supply to the electromagnetic magnet 12 is stopped, the plunger 15 is pressed by the pressing force of the pressing spring 15a.
Is moved to the motor 8 side, and the brake lining 17 is pressed against the brake wheel 16 to apply a brake to the motor 8. That is, the brake device 7 is operated. Accordingly, the motor 8 can reliably prevent the coasting operation, and automatically stops the shutter 6 at a preset fixed position, thereby preventing the shutter 6 from descending further and preventing the shutter 6 from being damaged.

During the lowering of the shutter 6, the coil spring 27 whose end is supported by being inserted and supported by the connecting wheel 25 and the spring supporting member 19, respectively, rotates the connecting wheel 25 and causes the spring supporting member 19 to rotate. Is fixed to the side wall 28a, so that the shutter 6 is screwed in such a manner that a rotational force can be applied in a winding direction. That is, when the shutter 6 descends, the coil spring 27
It twists in the direction in which repulsive force is obtained by the torsional action.

When the shutter 6 is rewound (increased) as necessary after the shutter 6 is lowered, a command signal for releasing the brake device 7 is output from the control device by turning on the operation switch, as in the case of lowering. At the same time when the brake device 7 is released, a command signal for driving the electric motor 8 in the reverse direction (the direction in which the shutter 6 is wound up) is output, and the electric motor 8 is activated to cause the shutter 6 to be turned by the torsion of the coil spring 27. The winding window 2 is opened in combination with the use of the generated rotational force.

In the case where the shutter 6 is now opened and a power failure occurs or an electric component such as the electromagnetic magnet 12 breaks down, the emergency release device 3 is used.
0 is manually operated, the brake device 7 is released, and the shutter 6 is released. When operating the release device 30,
In FIG. 4, a latch spring 37 is held in a hand and pulled downward, and a curved portion at a lower end thereof is latched by a latch 38. That is, when the hook spring 37 is pulled downward, the spring 37 itself is stretched as shown in FIG. Due to the stretching action of the retaining spring 37, the pull cord 31 is moved through the through hole 4b and the outlet 3
Pulled outward through 6. Due to the pulling force of the pull cord 31, the flat plate 33 in contact with the locking portion 34 moves toward the wall 4a of the end of the case 4 with the compression spring 35 compressed. Due to the movement of the flat plate 33, the tension cable 31 which is loosely connected between the flat plate 33 and the plunger 15 is tightened at the slack portion, and the compression spring 35 is compressed as shown in FIG. By this, plunger 1
5 against the force of the pressing spring 15a.
Then, the brake device 7 is released by releasing the pressure contact between the brake lining 17 and the brake wheel 16 to allow the electric motor 8 to idle. The released state of the brake device 7 can be maintained by retaining the retaining spring 37 on the retaining member 38 as shown in FIG.

When the emergency release device 30 is operated, it is needless to say that the urging force of the pressing spring 15a and the compression spring 35 must be sufficient to overcome the urging force of the latch spring 37. . Further, the compression spring 35 is provided for connecting the tension cable 31 with slack between the flat plate 33 and the plunger 15, thereby restricting the movement of the plunger 15 toward the electric motor 8. In addition to ensuring smooth movement by not giving, the gap between the plunger 15 and the suction surface 13 is small.
By giving a margin to the tension length of the tension cable 31,
The urging operation of the tension cable 31 in an emergency is performed by the pressing spring 15a.
As shown in FIG. 4, the compression spring 35 only needs to have a biasing force enough to loosen the tension index when the compression spring 35 is extended. Therefore, the biasing force is smaller than that of the pressing spring 15a. Although the tension force of the latch spring 37 has been described as a force that overcomes the urging force of the pressing spring 15a and the compression spring 35, the tension force of the latch spring 37 is substantially equal to the force that overcomes the pressing spring 15a. It is to be able to do.

After the brake device 7 is released as described above, the lower end of the shutter 6 is held by hand, and is pushed upward, so that the shutter take-up cylinder 5 receives the coil spring 27 inserted therein. The shutter 6 is automatically rotated by a rotational force generated by a repulsive force based on a twisting action, and is wound while the shutter 6 is raised. In the winding of the shutter 6, as described above, the brake device 7 is simply manually released by the emergency release device 30, and thereafter, the winding of the shutter 6 is performed by utilizing the rotational force of the coil spring 27. Since almost no human power is required, the emergency opening of the shutter 6 in an emergency can be quickly and reliably performed. In addition, it is not necessary to completely open the shutter 6 in an emergency, as long as the shutter 6 can be opened to the extent that a human body can pass through. After the shutter 6 is opened, the latch spring 3
7 is released and the compression spring 35 is returned to the original position, the force holding the plunger 15 on the attraction surface 13 side of the iron core 10 is lost. As shown by, the brake device 7 is again moved to the electric motor 8 side to apply a braking action to the brake device 7 to prevent the electric motor 8 from running idle. Therefore, since the brake device 7 is operating at the opening point of the opened shutter 6, there is no further release or descent. Therefore, there is no problem that the shutter 6 unexpectedly operates and harms the human body when escaping from the room.

Next, another embodiment of the emergency release device 30a of the present invention will be described with reference to FIGS. FIG.
In the drawing, reference numeral 41 denotes a tension spring mounted in the middle of the tension cable 31. One of the tension springs 41 can be moved up and down into the bracket 21 by projecting a lower end thereof below the shutter opening / closing device 1 on the plunger 15 side. Are attached to the upper ends of the operating rods 42 accommodated in the respective members with the tension cords 31 interposed therebetween.
As shown in FIG. 8, the operating rod 42 is vertically slidably held by guides 43 and 44 in the bracket 21, and has a horizontally elongated groove 45 in the center of the body corresponding to the electromagnetic magnet 12. A locking step 46 recessed on the wall 4a side is formed integrally with the operating rod 42. The groove 4 is formed on the side of the wall 4a corresponding to the groove 45.
A heart-shaped cam groove (cam member) 47 is formed to engage with the ball 48 fitted into the ball 5.

The emergency release device 30 of the other embodiment described above
a is pulled a tensile cord 49 in FIG. 7 below, together with the operation <br/> rod 42 moves downward, ball 48 fitted into the groove 45 of the locking stepped portion 46, groove When the operating rod 42 moves down and moves counterclockwise (downward) in the cam groove 47 while laterally moving in the inside 45, and reaches the position of the concave portion 50 below the cam groove 47 as shown in FIG. The ball 4
8 is stopped by the concave portion 50 and temporarily stops its movement. As described above, when the operating rod 42 is pulled down to a position where the ball 48 is locked in the concave portion 50 of the cam groove 47, the tension spring 41 attached to the tension cable 31 is pulled as shown in FIG. The brake device 7 is released by moving the iron core 10 to the suction surface 13 side against the force of the pressing spring 15a.
At this time, even if the force for pulling the operation rod 42 is loosened, the operation rod 42
Since the ball 48 is locked in the concave portion 50 of the cam groove 47, the ball 48 does not move upward even when the tensile force of the tension spring 41 acts. As a result, when the electric shutter 3 is in an emergency release state, the operating rod 42 is pulled downward, and the ball 48 that moves laterally in the concave groove 45 as the operating rod 42 descends is moved to the cam groove 47.
The brake device 7 can be released quickly and easily only by engaging with the concave portion 50 of. In this case, it is needless to say that a locking member for specially locking the operating rod 42 is unnecessary. To return the brake device 7 to the braking state, the operation
When the ball 48 is pulled downward, the ball 48 is
5 is disengaged from the concave portion 50 by lowering. Therefore, if the operating rod 42 is moved upward at this time, the ball 48 moves counterclockwise along the cam groove 47 and returns to the original position shown in FIG. As a result, the tensile force applied to the tension spring 41 decreases, so that the force of the pressing spring 15a overcomes the force of the tension spring 41, and moves the plunger 15 toward the electric motor 8 to exert a braking action on the brake device 7. Grant,
The idling of the motor 8 is prevented.

The emergency release devices 30 and 30a of the present invention include:
The example in which the shutter 6 is manually opened when the shutter 6 is closed has been described. However, even when a power failure occurs when the shutter 6 is lowered, the emergency release device 3 is opened.
0, 30a is manually operated as described above, and the brake device 7 is operated.
Is released, and in this state, the shutter 6 is manually lowered while the electric motor 8 is idling to close the window portion 2 so that the present invention is established.

[0024]

As described above, according to the present invention, a pull cord is attached to a plunger of an electromagnetic magnet for releasing a brake device of a shutter switch through a spring member, and the pull cord is attached to the outside of the shutter switch. So that the plunger can be manually operated from the outside,
In the event of an emergency such as a power outage, unlike the conventional case, in which the brake of the shutter is released by manually operating the brake release device of the shutter opening / closing device by going up to the ceiling, the pull cord is externally connected. By simply operating against the force of the spring member, the brake device of the shutter opening / closing device can be manually released safely and promptly, which makes it easy to manually release the shutter, especially in an emergency. It is convenient. In addition, a hook spring that maintains the tension of the pull cord is attached to the end of the pull cord that is led out from the shutter opening / closing device, so that when the brake device is manually released, the release state can be easily set. It is convenient to maintain.

Further, since the manual emergency release device for the brake device can be provided by combining a tension cord and a spring member, it can be manufactured economically with a simple structure.

Further, in another embodiment of the present invention, one of the tension cables is attached to a plunger of an electromagnetic magnet, and the other end is connected to an operation rod provided in a shutter opening / closing device so as to be vertically movable via a tension spring. The operating rod is further provided with a locking means for locking the operating rod when it is lowered, between the shutter opening and closing device, so that the operating rod is operated to release the brake device manually. Even when the operating rod is released from the hand, the position of the operating rod is automatically held by the locking means, so that the operation of releasing the brake device in an emergency can be performed quickly, reliably, and safely. There is also.

In addition, in the present invention, since the tension member is provided with a predetermined slack by the spring member connected to the tension member, an extra load is applied to the plunger by the urging force of the spring member or the like. Is added, and when the emergency release of the brake device is released, there is also an advantage that the braking of the brake device can be reliably performed without any trouble.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a shutter opening / closing device of an electric shutter provided with an emergency opening device according to the present invention.

FIG. 2 is a perspective view showing an attached state of an electric shutter.

FIG. 3 is a perspective view showing a use state of the electric shutter.

FIG. 4 is a vertical sectional view showing a main part of the brake device provided with the emergency release device according to the present invention during braking.

FIG. 5 is a side view of the emergency release device of the present invention.

FIG. 6 is a vertical sectional view showing a main part of the brake device provided with the emergency release device according to the present invention when the brake device is manually released.

FIG. 7 is a longitudinal sectional view showing a state of a braking device provided with another embodiment of the emergency release device of the present invention at the time of braking.

FIG. 8 is a longitudinal sectional view showing a main part of FIG. 7;

9 is a longitudinal sectional view showing a state in which the emergency release device of FIG. 7 is manually operated to release the brake device.

FIG. 10 is a side view showing a main part of FIG. 9 in a longitudinal section.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shutter opening-and-closing device 3 Electric shutter 4 Case 5 Shutter take-up cylinder 6 Shutter 7 Brake device 8 Electric motor 12 Electromagnetic magnet 15 Plunger 27 Coil spring 30 Emergency release device 30a Emergency release device 31 Tension cable 35 Hanging spring 41 Tension spring 42 Operating rod 45 concave groove 46 locking step 47 cam groove 48 ball 50 concave

Claims (2)

(57) [Scope of request for utility model registration] [Claim 1] to支着one end of the tensile cord to plunger of the electromagnet to release the braking device installed in the shutter opener, Oite in the middle of the tensile cord, impart a predetermined slack in the tensile cord during extension telescopically engaging the compression spring
Sealed, further, the outside of the shutter driving device, hanging
The tensioned state of the pull cord is maintained by being hooked on a stopper.
And a hook spring for holding the other end of the pull cord.
An emergency release device for an electric shutter, wherein the emergency release device is attached to a latch spring . 2. One end of a pull cord is attached to a plunger of an electromagnetic magnet for releasing a brake device installed in a shutter switch, and the other end of the pull cord is connected to a pull cord provided to be vertically movable in the shutter switch . Operation for pulling and pulling back
The operation rod is attached to the rod via a tension spring, and when the operation rod is lowered, the operation rod is locked between the shutter rod and the shutter to maintain the tensioned state of the pull cord, and the locking is released. A locking means for releasing the tension state of the pull cord when the cable is pulled , and further, supporting a tension cord for operating the operating rod on the operating rod.
An emergency release device for an electric shutter that is worn .