JPH02299484A - Rotation controller for rotor - Google Patents

Abstract

PURPOSE:To reduce power consumption by employing a permanent magnet as the plunger of an electromagnet for a brake unit and applying attracting/ releasing force through the electromagnet thereby driving a brake. CONSTITUTION:A brake unit 26 comprises an electromagnet 30 where a coil 29a is applied onto a core 29, a disc plunger 31 composed of a permanent magnet, a guide pin 32 for engaging/supporting the plunger 31 movably in horizontal direction, a brake wheel 34, and a brake lining 35. When the brake is released, power is fed so that the plunger 31 comprising the electromagnet 30 and the permanent magnet are attracted each other thus separating the brake wheel 34 from the brake lining 35. When power is fed reversely, the electromagnet 30 and the plunger 31 repel each other and the brake lining 35 presses the brake wheel 34 thus applying brake. Since a permanent magnet is employed as the plunger 31, the plunger 31 is attracted to the electromagnet 30 or the brake wheel 34 even when power supply is interrupted, thus maintaining braked state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotation control device for controlling the rotation of a rotating body used in a winding device for automatically opening and closing members such as a shutter, a roller conveying device, and the like.

2. Description of the Related Art Shutters conventionally used, for example, on bay windows of houses, garages, etc., are shifting from manual shutters to electric shutters. As shown in FIGS. 6 and 7, the electric shutter generally has a roof 3, which also serves as an eaves, installed above a window hole 2 opened in the outer wall of the house, and a stand 4 installed at the bottom. Upper rails 5. are provided on the upper and lower surfaces of the window 7L2, respectively. A lower rail 6 is laid, and a glass-filled sliding door 7 is slidably attached between the rails 5 and 6, and the 1 m3 eaves section is hollowed out to serve as a winding chamber 9 for a shutter 8 that also serves as a rain door. This winding chamber 9 accommodates a winding device 12 consisting of a roll 10 for taking the shutter 8@ and an electric motor 111 that rotationally drives this roll 10, and also serves as the rain door in which a large number of slats are fitted and connected to each other. The shutter 8 is attached to the roll 10 so that it can be rolled up, and an electric! The shutter 8 is moved up and down along the guide rail 13 by rotating the shutter 11 forward or backward by applying electricity. In the electric shutter configured as described above, when the power to the electric W111 is cut off and the vertical movement of the shutter 8 is stopped, the brake device shown in FIG. 8 is applied! 14 acts to maintain the stopped state. For example, as shown in FIG. 8, the brake device 14 includes an electromagnet 15, a plunger 16 that is attracted to or released from the electromagnet 15 by exciting or demagnetizing a coil 15a of the electromagnet 15, and a plunger 16 that is attracted to or released from the electromagnet 15. A spring 17 that always urges the plunger 16 toward the release side and a brake lining 18 are attached to the position corresponding to the plunger 16,
When braking, the electromagnet 15 is de-energized and the plunger 16 is pressed against the brake lining 18 by the biasing force of the spring 17 to maintain contact with the brake lining 18. 11 to prevent the shutter 8 from freely opening and closing.

[Problem to be solved by the invention]

The brake device 14 normally applies a braking force to the electric all when not energized by the force of the spring 17, and when driving a rotating body such as a shutter, the electric a
At the same time as power is applied to ll, the electromagnet 15 is also energized, and the electromagnetic force attracts the plunger 16 to the electromagnet 15 side against the force of the spring 17 to release the brake, and the electric all starts to rotate the rotating body. This rotary body is, for example, the shutter 8.
In this case, the opening and closing operations can be performed smoothly.

However, if a power outage occurs in the above state, the braking force is applied to the electric motor by the force of the spring 17, so if this is a shutter as a rotary body, its opening/closing operation is performed by the plunger 16 or the brake wheel 1.
Manual operation lever 2 installed on the 9 side in advance
0 (see Figure 9) was the only way to open and close it. In particular, in an emergency situation such as a fire occurring when the shutter is closed, people are likely to fall into a state of panic. Moreover, the manual operation lever 20 is usually installed in a hidden place such as the ceiling. Therefore, in the event of an emergency, it is almost impossible to remove the ceiling plate and operate the manual operation lever 20, and the brake of the electric motor 11 cannot be smoothly released, which may lead to a serious accident.

The brake device 14 also connects the plunger 16 of the electromagnet 15 to the brake wheel 1, for example, in order to release the braking of a rotating body such as a shutter in the event of an emergency such as a power outage.
A member forcibly opening from the 9 side and a manual operation lever 20
In other words, the brake device 14 requires a special mechanical brake release means for manual release in an emergency. Furthermore, the electromagnet 15 has a spring 17 for always urging the plunger 16 toward the brake wheel 19, and a spring insertion hole 15b must be specially drilled in the iron core 15c of the electromagnet 15 to insert and hold the spring 17. In order to manufacture the brake device 14 using the electromagnet 15, it goes without saying that many parts are required, and as the number of used parts increases, the structure becomes complicated and assembly is time-consuming. There was a problem of high

In view of the above-mentioned problems, the present invention provides a method for quickly and reliably releasing the braking of the rotating body using simple configuration means when controlling the drive of a rotating body such as a take-up cylinder that winds up a shutter in an emergency. An object of the present invention is to provide a rotation control device for a rotating body.

[Means to solve the problem]

The present invention uses a permanent magnet as a plunger of an electromagnet forming a main part of a brake device for a rotating body constituting a winding drum of a shutter, etc., and the electromagnet is connected to an energization control means for switching its polarity. The permanent magnet is configured to be attracted by energizing the electromagnet or, conversely, to be moved to the brake wheel side of the brake device to release the braking state of the brake device or to maintain the braking state, and The energization control means uses an electromagnet during a power outage! (a) It is characterized in that it is equipped with an energy storage means capable of storing electrical energy for performing sudden energization, and is configured to supply the electrical energy to an electromagnet to release the braking of the brake device in an emergency.

(Function) When the rotating body such as the take-up cylinder of the shutter is driven, the present invention controls energization so that when the operation switch is turned on, the electromagnet generates a magnetic force in the direction of attracting the plunger made of a permanent magnet. When energizing the means, the plunger is attracted to the electromagnet, the brake device is released, and the rotating body is rotated. When braking the rotating body, the operation switch is shut off. Release the suction,
In addition, the energization control means switches the polarity and energizes the electromagnet so that magnetic force is generated in a direction in which the magnetic poles of the electromagnet and the plunger repel each other, and the plunger, which is made of a permanent magnet, is moved toward the brake wheel and the rotating body is Braking is performed by a brake device, and when the brake of the rotating body is released in the event of a power outage, an emergency switch is turned on and an electromagnet is energized by storing electrical energy, for example by discharging the charge from a capacitor. , plunger! Manual operation of the rotating body is made possible by releasing the braking of the rotating body by attracting it to the magnet, and when the plunger is attracted to the electromagnet by using a permanent magnet, the electromagnet is used only when the plunger is being attracted. By energizing, the attraction state can be maintained, which eliminates the need to continuously energize the electromagnet, and in the event of a power outage, the braking of the brake device can be electrically released using the energization from the capacitor, etc. The present invention is characterized in that the manual operation of the rotating body is facilitated, and during braking, the braking force can be maintained by the action of a permanent magnet without using any special pressing means for the plunger.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. The present invention will be described with reference to an example in which the present invention is applied to an electric shutter opening/closing machine used for the windows of houses, garages, and the like.

In FIG. 1, 21 is a shutter opening/closing machine equipped with a rotation control device 22 of the present invention, and the rotation control device 22 built in a cylindrical case 23 and this rotation control device! 22 is inserted inside the winding drum 25, and a hollow pipe-shaped winding drum 25 is driven and rotated by the control value N24.

Next, the detailed structure of the rotation control device 22 will be explained with reference to FIGS. 1 and 3. The zero rotation control device 22 includes, from the left side of FIG. It consists of an electric motor 27 and a plurality of planetary gear transmission devices 28 that decelerate the rotation of the electric motor 27 and rotate the take-up drum 25, and these members are inserted into the case 23 in a horizontal line. There is. As shown in FIG. 3, the brake device 26 includes an electromagnet 30 with a coil 29a wound around an iron core 29, a disk-shaped plunger 31 made of a permanent magnet, and an electric motor 812 on the attraction surface 30a of the electromagnet 30.
a guide bin 32 that protrudes toward the 7 side and holds and supports the plunger 31 so that it can be moved horizontally and not rotate;
A brake wheel 34 is fixed to a rotor shaft 33 using a key or the like, and a plunger 3 is attached to this brake wheel 34.
The coil 2 of the electromagnet 30 consists of an annular brake lining 35 with high wear resistance attached toward the 1 side.
When 9a is excited, the plunger 31 is attracted to the attraction surface 30a of the electromagnet 30 to release the brake device 26, or is attracted to the brake wheel 34 to apply braking force to the electric motor 1127. As shown in FIG. 1, the zero-order electric motor 27 is connected to the brake device inside the case 23! 26 and the planetary gear transmission 28, the rotor shaft 33 has a brake wheel 34 fixed on one end, and the other end is drivingly connected to the drive shaft 36 of the planetary gear transmission 28. , a locking member 37 is attached to the case 23.
It is rotatably supported by roller bearings 38, 38a attached via the roller bearings 38, 38a. Further, the drive shaft 36 drivingly connected to the rotor shaft 33 of the electric motor 27 has a roller bearing 38a and a bearing 40 of a bearing body 39 fitted to the end of the case 23 located on the second side of the planetary gear transmission. It is drivably connected to the electric motor 8127 via a plurality of planetary gear groups arranged between them, and is rotatably protruded from the bearing 40 to the outside of the case 23 by a predetermined length. The case 23 includes the brake device 26, the electric I127,
The planetary gear transmission 28 is housed and arranged horizontally and linearly on one bracket 41 of the winding drum 25 in a horizontal state t8.
It is attached by connection etc. On the other hand, the winding drum 25 containing the rotation control device 22 is formed in the shape of a hollow pipe, and one end thereof is connected to the rotation control device 22 as shown in FIG.
2 is rotatably fitted and held via a bearing member 42 to a bracket 41 that horizontally supports the take-up drum 25, and the other end has a fixed shaft 43 projecting horizontally toward the side of the winding drum 25. The winding cylinder 25 and the rotation control device 22 are fixed to the body 44, and as shown in FIG. The rotation control device 2
A winding cylinder 25 is drivably connected to the winding cylinder 2 through a connecting wheel 45. As shown in FIG. 1, the shutter opening/closing device 21 having the above structure has a rectangular locking shaft 4 protruding from the bracket 41 side.
6 is non-rotatably fitted to a side wall 47 of a winding chamber (not shown) and is fixed to the mounting body 44 side.The fixed shaft 43 is inserted into a side wall 48 of the winding chamber via a bearing member 49 to prevent winding. Installed in the chamber. As a result, although one end of the winding drum 25 is fitted to the bracket 41 via the bearing member 42 and the other end is fixed to the mounting body 44, the fixed shaft 43 of this mounting body 44 is attached to the side wall. By being inserted and supported by the bearing member 49 of 48, it is rotatably supported by the bracket 41 and the fixed shaft 43, and the rotational force of the rotation control device 22 is transmitted through the drive shaft 36 → the connecting wheel 5. can be transmitted to.

Note that 50 shown in FIG. 2 is a shutter attached to the winding cylinder 25.

Next, in Fig. 4, electric v3 $127 and electromagnet 30
The configuration of the energization control circuit 51 that energizes the rotation control device 22, that is, drives and controls the rotation control device 22, will be described.

First, the energizing circuit 51a of the electric @21 is connected to the electromagnet 30.
Timers T+ and T set the energization time (approximately 1 to 2 seconds) to
x, and a relay R7 for switching the direction of current flowing through the coil 29a of the electromagnet 30, that is, the polarity.
Rx and the normally closed contacts R and b of relay R2 are connected to the electric 8I
121 and the power supply 52 in parallel. 53
is an operating switch.

Further, the energizing circuit 51b of the electromagnet 30 is connected to the timer T3. T8
Normally closed auxiliary contacts Tub, Tab, normally open contacts R+a+ + RIal and normally closed contacts R+b+, R of relay R9
+bm is connected to the power supply 52 together with the electromagnet 30 without being restricted by the operation switch 53 via the rectifying element.
A capacitor C is inserted and connected between the power supply 52 and the electromagnet 30 to serve as a means of supplying emergency power in the event of a power outage. It is an emergency switch that opens and closes and is installed at a designated location in the room.

Next, the operation will be explained.

First, the case where the shutter 50 is lowered will be described. In FIG. 4, when the operation switch 53 is turned on, relays R1, R1, timer T, and electric! a27 is energized, the normally open contacts R1al + RIal of relay R2 close, and the normally closed contacts R1b, , R, b of relay R6 open,
In addition, the normally closed contact Rub of relay R8 is also opened at the same time. As a result, current is supplied from the power source 52 to the coil 29a of the electromagnet 30 in the direction of attracting the plunger 31 made of a permanent magnet to the attraction surface 30a. (X arrow direction in Figure 4),
That is, when the magnetic pole on the electromagnet 30 side of the plunger 31 is the south pole, the attraction surface 30a of the electromagnet 30 supplies current to the coil 29a in the direction of the north pole, so that the plunger 31
The brake wheel 34 is released and attracted to the electromagnet 30, releasing the brake device 2G. For this reason electric 41
27 is activated when the brake is released, and the shutter 50 wound on the winding cylinder 25 is gradually lowered. The electromagnet 3
When the plunger 31 is attracted to 0, the timer TI operates, opens its normally closed auxiliary contacts T and b, and cuts off the power to the electromagnet 30. However, since the plunger 31 is made of a permanent magnet, it is not attracted to the electromagnet 30. The brake device 26 continues to be released while the
, T, , 30).

When the operating switch 53 is released when the shutter 50 has descended to the normal position (or the operating switch 53 may be released using a limit switch (not shown)), the power to the electric motor 27 is cut off, and at the same time, the relay R3 is turned off.
Normally closed contacts R and b close and timer T8 is energized. On the other hand, relay R1 and timer T are de-energized, and relay R
1 normally open contact R+all RIal is open, and conversely, normally closed contact R1b1. R+bt is closed and the coil 29 of the electromagnet 30
A current flows in the opposite direction to that described above (in the direction of the Y arrow in FIG. 4), that is, when the relay R9 is de-energized, its normally open contact R.

al r R+a= and the normally closed contacts R, b, , R, b, are switched, and thereby the coil 2 of the electromagnet 3o
This is to change the direction of the current flowing through 9a. That is, current is passed in a direction that causes a magnetic pole in the electromagnet 30 to repel the plunger 31. As mentioned above, t
When a current in the opposite direction flows through the coil 29a of the iron stone 3o, the coil 29a is excited and the magnetic pole of the attraction surface 30a is Ni
The polarity is switched from the S pole to the S pole. On the other hand, plunger 31
Since the magnetic pole of the electromagnet 30 (II remains the S pole), the plunger 31, which had been attracted to the attracting surface 30a of the N magnet 30, is now rapidly attracted to the N-3i polarity. The brake wheel 34
It moves to the side and contacts the brake lining 35 to apply braking to the electric motor 27. That is, the brake device 26 is activated. As a result, the plunger 31 of the electric motor 27 is engaged with the guide bin 32 so as not to rotate and is attracted to the brake wheel 34 side, so that sudden braking is applied.
Then, the shutter 50 finishes lowering. When the plunger 31 is attracted to the brake wheel 34, the timer T is activated and its normally closed auxiliary contact T is activated.

b to cut off the power to the electromagnet 30. In this case, since the plunger 31 is a permanent magnet, the brake wheel 3
4 through the brake lining 35, the electric motor 27 is not released from braking and maintains the braking state, so that the shutter 50 cannot be opened manually (see 53 in FIG. 5). 27.R,,R,,T
,,T.

30).

Next, when opening the shutter 50, by operating the operation switch 53 in the same manner as described above, the brake device 26 is released and braked in the same manner as described above, and the shutter 50 is wound onto the winding cylinder 26. Can be opened. On the other hand, the capacitor C inserted into the energizing circuit 51b of the electromagnet 30 is always connected to the power source 52 and kept in a charged state.

Next, in the event of a power outage due to an emergency such as a fire accident, the motor 2
The case where the brake 7 is released and the shutter 50 is opened will be explained.

In this case, since the power supply 52 is cut off due to a power outage,
Electric motor27. The electromagnet 30 cannot be energized. Therefore, the electric Ia 27 is braked by the brake device 26, and the shutter 50 cannot be pushed up manually. In the event of a power outage due to a fire, etc., the shutter 50 must be opened in an emergency. When escaping outdoors, the present invention provides that when the emergency switch 54 installed on the indoor side (not shown in FIG. 4) is turned on, the charge stored in the capacitor C is
The current is rapidly discharged and flows through the coil 29 of the electromagnet 3o.
a, the flow flows in the direction that attracts the plunger 31 (in the direction of the X arrow in FIG. 4), and the plunger 31 in FIG.
UjLf on the suction surface 30a of 0? let That is, electromagnet 3
Due to the current supplied from the capacitor C, an N-pole magnetic pole is generated on the attracting surface of the o, similar to when the brake of the motor 27 is released. Therefore, the electromagnet 3o of the plunger 31
Since the side is 5IIjI, the plunger 31
is attracted by the electromagnet 30, allowing the brake device 26 to be released quickly and easily. As a result, the electric motor 27 becomes in a state where it can idle, and the shutter 50
Since the door only receives light resistance from both indoors and outdoors without braking, it can be opened easily by hand with light force. Therefore, in the event of an emergency, the shutter 50 can be manually opened to allow the person to escape to the outside, and in the garage, the vehicle can be pulled outside in an emergency and fire extinguishing work can be carried out through the opening of the shutter. On the other hand, even during a power outage, unless the emergency switch 54 is turned on, the brake device 26 is in operation, so the shutter 50 is kept in a locked state, and intrusion from the outside can be reliably prevented.

The present invention has been described with reference to an embodiment in which the charging current of a capacitor inserted and connected to an energization control circuit is applied to an electromagnet to release the braking of a brake device as a energization means in an emergency such as a fire outbreak. Without limitation, for example, the present invention can be realized even if a rechargeable battery or the like is used as a means for energizing the electromagnet in an emergency.

Furthermore, although the present invention has been described with reference to a shunter as an embodiment of the rotary body, the present invention is not limited to this, and can be similarly used for blinds, roll curtains, conveyance rollers, and the like.

〔Effect of the invention〕

As explained above, in the present invention, when the electric motor that drives the rotating body is turned off in an emergency such as a fire outbreak,
V! is applied to the electromagnet by means of storing electricity from a capacitor, etc. By suddenly energizing the motor and releasing the brakes on the motor, it is possible to drive the rotating body, thereby reliably preventing unexpected situations from occurring due to braking being applied to the rotating body in the event of an emergency. I can do it.

In addition, the electromagnet used in the brake device uses a permanent magnet in its plunger, and by switching the direction of the current flowing through the electromagnet, the plunger can be
Just by energizing 1t1 stone, it can be sucked and released, so it is not possible to use a spring to hold the plunger in the release position when it is not energized, or to continue the suction operation by always energizing it during suction. Since there is no electromagnet at all, and the electromagnet only needs to be energized when the plunger is activated, the rotation control device can be manufactured with a simple structure, small and lightweight, and it is possible to save electrical energy, reducing power consumption. can do.

Furthermore, when an emergency switch is turned on, the brakes on rotating bodies such as shutter openers can be released instantly by supplying stored electrical energy to the electromagnet. Handling operations can be performed quickly and reliably.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a shutter opening/closing machine equipped with the rotation control device of the present invention, Fig. 2 is a perspective view showing an example of using the present invention in a shutter opening/closing machine, and Fig. 3 shows the main parts of the device of the present invention. 4 is an electric circuit diagram of the present invention, and FIG. 5 is the same (
6 is a perspective view showing the usage state of the shutter opening/closing device, FIG. 7 is a sectional view schematically showing the structure of the conventional shutter opening/closing device, and FIG. 8 is the same (main parts of the conventional device). The sectional view shown in FIG. 9 is a perspective view showing a conventional embodiment in which the shutter opening/closing device is manually operated. 22. Rotation control device, 25. Winding cylinder, 26. Brake device, 27. Electric motor,

Claims (2)

[Claims] (1) In a device in which a brake device attached to an electric motor that rotates a rotating body such as a winding drum of a shutter is operated by attraction and release operations of an electromagnet, the electromagnet is equipped with a plunger made of a permanent magnet, and A rotation control device for a rotating body, characterized in that a device for controlling the rotation of a rotating body is provided with energization control means for switching the direction of current flowing through the electromagnet when the plunger is attracted to or released from the electromagnet. (2) In the rotation control device according to claim 1, the energization control means for switching the flow direction of the current energized to the electromagnet includes a brake release means for energizing the electromagnet and releasing the brake of the rotating body only in an emergency. A rotation control device for a rotating body, characterized in that it is equipped with a.