JPH083311B2 - Rotation control device for rotating body - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation control device that controls the rotation of a rotating body used in a winding device for a member such as a shutter that automatically opens and closes, a roller conveying device, and the like.

2. Description of the Related Art Conventionally, for example, a shutter used for a window of a house, a garage or the like is shifting from a driving type to an electric type. As shown in FIGS. 6 and 7, the electric shutter is generally provided with a roof 3 serving as an eaves above the window hole 2 opened in the outer wall 1 of the house, and a table 4 is attached to the lower portion. The upper rails are provided on the upper surface and the lower surface of the window hole 2, respectively.
5, a lower rail 6 is laid, a sliding door 7 containing glass is slidably mounted between the rails 5 and 6, and the roof 3
The eaves part is made hollow to form a winding chamber 9 for the shutter 8 which also serves as a shutter. In this winding chamber 9, a roll 10 for winding the shutter 8 and an electric motor for driving the roll 10 to rotate.
The shutter 8 which accommodates a winding device 12 composed of 11 and which has a large number of slats fitted and joined to each other is attached to the roll 10 so that the shutter 8 can be wound up, and the electric motor 11 is normally or reversely rotated by energization. Thus, the shutter 8 is configured to move up and down along the guide rail 13. Further, in the electric shutter having the above structure, the electric motor
When the power supply to 11 is cut off and the raising / lowering operation of the shutter 8 is stopped, the brake device 14 shown in FIG. 8 operates to maintain the stopped state. For example, as shown in FIG. 8, the brake device 14 includes an electromagnet 15, and a plunger 16 that is attracted to or released from the electromagnet 15 by exciting or demagnetizing a coil 15a of the electromagnet 15. Plunger 16
A spring 17 for constantly urging the motor to the release side and a brake lining 18 at a position corresponding to the plunger 16
It consists of a brake wheel 19 fixed to the rotor shaft of 11, and the current is cut off to the electromagnet 15 at the time of braking, and the plunger 16 is pressed against the brake lining 18 by the biasing force of the spring 17 to hold it in contact with the electric motor. 11 is braked so that the shutter 8 does not freely open and close.

[Problems to be Solved by the Invention]

Then, the braking device 14 causes the braking force to act on the electric motor 11 when not energized by the force of the normal spring 17,
When driving a rotating body such as a shutter, the electric motor 15 is energized and the electromagnet 15 is energized at the same time, and the electromagnetic force attracts the plunger 16 to the electromagnet 15 side against the force of the spring 17 to release the braking. Then, the electric motor 11 is activated to rotate the rotating body, and when the rotating body is, for example, the shutter 8, the opening / closing operation can be smoothly performed.

However, in the above-mentioned state, when a power failure state occurs, the braking force is applied to the electric motor by the force of the spring 17, so that when the rotating body is a shutter, the opening / closing operation is performed by the plunger 16 or the brake wheel 19. There was no way to open or close the lever 20 (see Fig. 9) for manual operation that was previously installed on the side except for manual operation. In particular, in an emergency such as a fire that occurs when the shutter is closed, the human mind is likely to fall into a panic state, and moreover, the manual operation lever 20 is usually installed in an unobtrusive ceiling or the like. Therefore, it is almost impossible to operate the manual operation lever 20 by removing the ceiling plate in the emergency,
The braking of the electric motor 11 cannot be released smoothly, and further,
There was a danger of causing a big accident.

Further, the brake device 14 is, for example, a member that forcibly releases the plunger 16 of the electromagnet 15 from the brake wheel 19 side in order to release the braking of the rotating body such as the shutter in an emergency such as a power failure, and a manual operation. It must be in drivable communication with the operating lever 20, i.e. the braking device 14 requires a special mechanically structured braking release means for manual release in an emergency. Moreover, the electromagnet 15 has a plunger.
Spring 17 for always urging 16 toward brake wheel 19
In order to insert and hold this, a spring insertion hole 15b must be specially drilled in the iron core 15c of the electromagnet 15, and many parts are required to manufacture the brake device 14 using the electromagnet 15. Of course, there is a problem that the structure becomes complicated with the increase in the number of parts used, the assembly is troublesome, and the manufacturing cost becomes high.

In view of the above-mentioned problems, the present invention is designed to quickly and surely release the braking of the rotating body by a simple constitutional means when the drive control of the rotating body such as the winding cylinder for winding the shutter is performed in an emergency. Another object of the present invention is to provide a rotation control device for a rotating body.

[Means for solving the problem]

According to the present invention, a permanent magnet is used as a plunger of an electromagnet that forms a main part of a brake device for a rotating body that constitutes a winding body of a shutter, and the electromagnet is connected to an energization control means for switching its polarity. Then, the permanent magnet is attracted by energizing the electromagnet, or, conversely, is moved to the brake wheel side of the braking device to release the braking state of the braking device or maintain the braking, and The energization control means is provided with an energy storage means capable of storing electric energy for performing emergency energization of the electromagnet in the event of a power failure, and in an emergency, the electric energy is supplied to the electromagnet to release the braking of the brake device. It is characterized in that it is configured in.

[Action]

According to the present invention, when a rotating body such as a wind-up cylinder of a shutter is driven, by energizing an operation switch, energization is performed from energization control means so that a magnetic force is generated in the electromagnet in a direction to attract a plunger made of a permanent magnet. , The plunger is attracted to the electromagnet side to release the brake device to rotate the rotating body, and when the rotating body is braked, the electromagnet is released from the attraction of the plunger by breaking the operation switch,
Moreover, the polarity is switched by the energization control means to energize so that the magnetic poles of the electromagnet and the plunger generate magnetic force in the direction in which they repel each other, and the plunger composed of the permanent magnet is moved to the brake wheel side to move the rotor. When braking is performed by the braking device, or when braking of the rotating body is released at the time of power failure, an emergency switch is turned on to store electrical energy, for example, the electric magnet is energized by discharging the electric charge from the capacitor. , It is possible to manually operate the rotating body by releasing the braking of the rotating body by attracting the plunger to the electromagnet.When the plunger is attracted to the electromagnet side by using the permanent magnet, the plunger is attracted to the electromagnet. The energized state can be maintained by energizing only when it is turned on, which makes continuous energization of the electromagnet unnecessary and stops the operation. In some cases, the energization from a capacitor etc. is used to electrically release the braking of the brake device to facilitate the manual operation of the rotating body. It is characterized in that the braking force can be maintained without using the pressing and urging means.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. Note that the present invention will be described, for example, as an example implemented in an electric shutter opening / closing device used for a window of a house, a garage, or the like.

In FIG. 1, reference numeral 21 denotes a shutter opening / closing device provided with a rotation control device 22 of the present invention. The rotation control device 22 is housed in a cylindrical case 23, and the rotation control device 22 is inserted inside to perform the control. It is constituted by a hollow pipe-shaped winding cylinder 25 which is driven and rotated by a device 24.

Next, the detailed structure of the rotation control device 22 will be described with reference to FIGS. The rotation control device 22 includes, from the left side of FIG. 1, a braking device 26 having an electromagnet 30, an electric motor 27 having a forward rotation and a reverse rotation function, and a plurality of rotation speed reducing units for rotating the winding cylinder 25. The planetary gear transmission 28 and the components are inserted and arranged in the case 23 in a horizontal row. As shown in FIG. 3, the braking device 26 includes an electromagnet 30 in which a coil 29a is wound around an iron core 29, a disc-shaped plunger 31 made of a permanent magnet, and an attracting surface 30a of the electromagnet 30 directed toward the electric motor 27 side. And a guide pin 32 that is provided so as to project so that the plunger 31 can move in the horizontal direction and is engaged and supported so as not to rotate, and a key or the like is used for the rotor shaft 33 of the electric motor 27 facing the plunger 31. Brake wheel 34 that has been fastened and
When the coil 29a of the electromagnet 30 is excited, the plunger 31 is attracted to the attraction surface 30a of the electromagnet 30 and the braking device 26 is formed. Is released, or the braking force is applied to the electric motor 27 by being sucked toward the brake wheel 34 side. Next, as shown in FIG. 1, the electric motor 27 is housed between the brake device 26 and the planetary gear transmission device 28 in the case 23, and the rotor shaft 33 thereof has the brake wheel 34 fixed to one end thereof. The other end is rotatably supported by roller bearings 38, 38a attached to the case 23 via a locking portion 37 while being drive-coupled to the drive shaft 36 of the planetary gear transmission 28. The drive shaft 36 drivingly coupled to the rotor shaft 33 of the electric motor 27 includes a roller bearing 38a and a bearing body 39 fitted to the end of the case 23 located on the planetary gear transmission 28 side.
Is coupled to the electric motor 27 through a plurality of planetary gear groups arranged between the bearing 40 and the bearing 40, and is projected from the bearing 40 to the outside of the case 23 by a predetermined length so as to be rotatable. ing. Then, the case 23 is installed by welding or the like so that the brake device 26, the electric motor 27, and the planetary gear transmission device 28 described above are accommodated and arranged in a straight line in a horizontal direction and are horizontally arranged on one bracket 41 of the winding cylinder 25. There is. On the other hand, the winding cylinder 25 having the rotation control device 22 built therein is formed in a hollow pipe shape, and one end thereof is a bearing member on a bracket 41 for horizontally supporting the rotation control device 22 as shown in FIG. It is rotatably fitted and held via 42, and the other end thereof is fixed to a disc-shaped mounting body 44 in which a fixed shaft 43 is horizontally projected toward the side of the winding drum 25. Then, the winding cylinder 25 and the rotation control device
As shown in FIG. 1, the boss 22 of the connecting wheel 45 is fixed to the protruding end of the drive shaft 36 protruding from the bearing body 39 of the case 23 by a set screw or the like, and is attached to the outer peripheral portion of the connecting wheel 45. By screwing a set screw from the outside of the winding cylinder 25 to the connecting wheel 45, the winding cylinder 25 is drivably connected to the rotation control device 22 via the connecting wheel 45. As shown in FIG. 1, in the shutter opening / closing device 21 having the above-described structure, a rectangular locking shaft 46 projecting on the bracket 41 side is non-rotatably fitted to a side wall 47 of a winding chamber (not shown), and is attached to the mounting body 44 side. The fixed fixed shaft 43 is attached to the winding chamber by inserting it into the side wall 48 of the winding chamber via the bearing member 49. As a result, one end of the winding body 25 is fitted to the bracket 41 via the bearing member 42, and the other end is fixed to the mounting body 44.
Since the fixed shaft 43 is inserted and supported by the bearing member 49 of the side wall 48, the fixed shaft 43 is rotatably supported by the bracket 41 and the fixed shaft 43, and the rotational force of the rotation control device 22 is connected to the drive shaft 36 → Good transmission can take place via the wheel 45.

Reference numeral 50 shown in FIG. 2 is a shutter attached to the winding cylinder 25.

Next, the configuration of the energization control circuit 51 for energizing the electric motor 27 and the electromagnet 30, that is, for driving and controlling the rotation control device 22 will be described with reference to FIG.

_First , the energizing circuit 51a of the electric motor 27 includes the timers T ₁ and T ₂ that set the energizing time (about 1 to 2 seconds) to the electromagnet 30, and the direction in which the current energizing the coil 29a of the electromagnet 30 flows, that is, The relays R ₁ and R ₂ for switching the polarity and the normally-closed contact R ₂ b of the relay R ₂ are connected in parallel to the power source 52 together with the electric motor 27. 53 is an operation switch.

Further, the energization circuit 51b of the electromagnet 30, the timer T _1, normally closed auxiliary contact T ₁ b of T _2, and T ₂ b, normally open contacts R ₁ a _1, R ₁ a ₂ and normally closed contact of the relay R ₁ R ₁ b ₁ and R ₁ b ₂ are connected in parallel with the electromagnet 30 to the power source 52 via the rectifying element D without being restricted by the operation switch 53, and the power source 52 and the electromagnet 30 are connected to each other. A capacitor C, which serves as a means for supplying an emergency power supply in the event of a power failure, is inserted between the two, and 54 is an emergency switch that opens and closes the circuit between the capacitor C and the electromagnet 30 and is attached at a predetermined position in the room.

 Next, the operation will be described.

First, the case where the shutter 50 is lowered will be described. When the operation switch 53 is turned on in FIG. 4, the relays R ₁ , R ₂ , the timer T ₁ and the electric motor 27 are energized, and the relay R ₁
Normally closed contacts R ₁ a ₁ and R ₁ a ₂ are closed, and normally closed contact R of relay R ₁ is closed.
₁ b ₁ and R ₁ b ₂ open, and the normally closed contact R ₂ b of relay R ₂ opens at the same time. As a result, the coil 29a of the electromagnet 30 has a power supply 52
A current is supplied from and flows in the direction in which the permanent magnet plungeer 31 is attracted to the attracting surface 30a (direction of arrow X in FIG. 4). That is, when the magnetic pole on the electromagnet 30 side of the plunger 31 is the S pole, the electromagnet 30 The attraction surface 30a of the device supplies a current to the coil 29a in the direction of becoming the N pole, so that the plunger 31 disengages the brake wheel 34 and is attracted to the electromagnet 30 to release the brake device 26. For this reason, the electric motor 27 is released from its braking and is started, and the shutter 50 wound on the winding drum 25 is gradually lowered. When the plunger 31 is attracted to the electromagnet 30, the timer T ₁ is operated to open the normally closed auxiliary contact T ₁ b, interrupt the energization of the electromagnet 30, however, since the plunger 31 is made of a permanent magnet, an electromagnet The brake device 26 continues to be released while being sucked into 30 (53, 27, R _{1 in} FIG. 5,
See R ₂ , T ₁ , 30).

If the operation switch 53 is opened (or the operation switch 53 may be released by a limit switch (not shown)) when the shutter 50 descends to the fixed position, the electric power to the electric motor 27 is cut off and the relay R the normally closed contact of the ₂ R ₂ b timer T ₂ is energized to close. Meanwhile, relay R ₁
And timer T ₁ are de-energized, relay R ₁ normally open contact R ₁ a ₁ ,
R ₁ a ₂ opens and, conversely, the normally closed contacts R ₁ b ₁ and R ₁ b ₂ close and the electromagnet 30
A current flows through the coil 29a in the opposite direction to the above (the direction of arrow Y in FIG. 4). That is, when the relay R ₁ is de-energized, the normally open contacts R ₁ a ₁ , R ₁ a ₂ and the normally closed contacts R ₁ b ₁ , R ₁ b ₂ are switched, whereby the electromagnet 30 The direction of the current flowing through the coil 29a is changed. That is, an electric current is caused to flow in the direction in which the magnetic pole that repels the plunger 31 is generated in the electromagnet 30. As described above, when a reverse current flows through the coil 29a of the electromagnet 30, the coil 29a is excited and the magnetic pole of the attracting surface 30a is switched from the N pole to the S pole. On the other hand, since the magnetic pole on the electromagnet 30 side of the plunger 31 remains the S pole,
Plunger 31 attracted to attraction surface 30a of 30 is electromagnet 3
When the polarity of 0 is switched from the N pole to the S pole, it rapidly repels and moves to the brake wheel 34 side, contacts the brake lining 35, and brakes the electric motor 27. That is, the brake device 26 is differentially operated. As a result, in the electric motor 27, the plunger 31 is engaged with the guide pin 32 in a non-rotatable manner and is attracted to the brake wheel 34 side, so that sudden braking is applied to stop and the descent of the shutter 50 is completed. When the plunger 31 is attracted to the brake wheel 34, the timer T ₂ operates to open the normally closed auxiliary contact T ₂ b,
Turn off the power to the electromagnet 30. In this case, since the plunger 31 is a permanent magnet, it is adsorbed to the brake wheel 34 via the brake lining 35, so that the electric motor 27 does not release the braking and maintains the braking state.
The shutter 50 cannot be opened manually (see 53, 27, R ₁ , R ₂ , T ₁ , T ₂ , 30 in Fig. 5).

Subsequently, when the shutter 50 is opened, the brake device is operated by operating the operation switch 53 as described above.
26 is the same as the above, released and braking operation, shutter
The winding drum 50 can be wound around the winding drum 26 and released. on the other hand,
The capacitor C inserted in the energizing circuit 51b of the electromagnet 30 is always connected to the power source 52 and is kept in a charged state.

Next, in the event of a power failure in an emergency such as a fire accident, the electric motor
The case where the braking of 27 is released and the shutter 50 is opened will be described.

In this case, since the power supply 52 is cut off by a power failure,
The electric motor 27 and the electromagnet 30 cannot be energized. Therefore, the electric motor 27 is braked by the brake device 26, and the shutter 50 cannot be manually pushed up. When a power failure occurs due to a fire or the like, and the shutter 50 is opened urgently to escape to the outside, the present invention, when the emergency switch 54 mounted on the indoor side not shown in FIG. The charged electric charge is rapidly discharged and its current is transferred to the coil 29a of the electromagnet 30 and the plunger 31.
Flow in the direction of sucking (see arrow X in Fig. 4),
In FIG. 1, 31 is attracted to the attraction surface 30a of the electromagnet 30. That is, the magnetic field of the N pole is generated on the attracting surface of the electromagnet 30 by the current supplied from the capacitor C, similarly to when the braking of the electric motor 27 is released. Therefore, Plunger 31
Since the side of the electromagnet 30 has a south pole,
31 is attracted to the electromagnet 30, and the brake device 26 can be released quickly and easily. As a result, the electric motor 27 is allowed to idle, and the shutter 50 only receives a light resistance in a non-braking state from both inside and outside due to the action of a spring (not shown) inside the shutter opening / closing device 21. It can be easily opened with a light force by human power.
Therefore, in an emergency, the shutter 50 can be manually opened to escape to the outside, and in the garage, the vehicle can be urgently pulled out to the outside to perform fire extinguishing work through the opening of the shutter. On the other hand, even at the time of power failure, unless the emergency switch 54 is turned on, the brake device 26 is in operation, so that the shutter 50 is kept in the locked state, and intrusion from the outside can be reliably prevented.

The present invention has been described with reference to an embodiment in which, as an energizing means in an emergency such as a fire, the charging current of the capacitor inserted in the energization control circuit is applied to the electromagnet to release the braking of the brake device. Without being limited thereto, for example, the present invention can be realized by using a rechargeable battery as an energizing means for an electromagnet in an emergency.

Further, although the present invention has been described with respect to the shutter as an embodiment of the rotating body, the present invention is not limited to this, and blinds, roll curtains, rollers for transportation and the like can be similarly diverted and used.

〔The invention's effect〕

As described above, in the present invention, when the power source of the electric motor that drives the rotating body is cut off in an emergency such as a fire, the electromagnet is urgently energized by the storage means such as a capacitor to release the braking of the electric motor. Since it is possible to drive the rotating body, it is possible to reliably prevent an unexpected situation due to braking of the rotating body in the event of an emergency.

In addition, a permanent magnet is used for the plunger of the electromagnet used in the brake device, and moreover, by switching the direction of the current flowing through the electromagnet, the plunger only energizes the electromagnet and attracts it. Since it can be released, there is no need to use a spring to hold the plunger in the release position when de-energized, or to always energize during suction to continue the suction operation.The electromagnet is energized only when the plunger is activated. Since the rotation control device can be manufactured in a small structure and light weight with a simple structure,
Since electric energy can be saved, power consumption can be reduced.

Furthermore, when releasing the braking of the rotating body in an emergency, when the emergency switch is turned on, the stored electric energy is supplied to the electromagnet and the braking can be released instantly. The handling operation can be performed quickly and reliably.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a shutter opening / closing device equipped with a rotation control device of the present invention, FIG. 2 is a perspective view showing an example in which the present invention is used in a shutter opening / closing device, and FIG. 3 is a main part of the device of the present invention. Sectional drawing, FIG. 4 is an electric circuit diagram of the present invention, FIG. 5 is the same timing chart, FIG. 6 is a perspective view showing a use state of the shutter opening and closing device, and FIG. 7 is a structure of a conventional shutter opening and closing device. FIG. 8 is a sectional view schematically showing the main part of the conventional apparatus, and FIG. 9 is a perspective view showing a conventional embodiment for manually operating the shutter opening / closing device. 22 …… Rotation control device, 25 …… Winding cylinder, 26 …… Brake device, 27 …… Electric motor, 30 …… Electromagnet, 31 …… Plunger,
51 …… energization control circuit, c …… capacitor

Claims (2)

[Claims] 1. A device in which a brake device attached to an electric motor for rotating a rotating body such as a wind-up cylinder of a shutter is operated by attracting and releasing an electromagnet, wherein the electromagnet is provided with a plunger made of a permanent magnet. At the same time, when the plunger is attracted to or released from the electromagnet, an electrification control means for switching the direction of the current flowing through the electromagnet is additionally provided. 2. The rotation control device according to claim 1, wherein the energization control means for switching the direction of the current flowing through the electromagnet energizes the electromagnet only in an emergency to release the braking of the rotating body. A rotation control device for a rotating body, further comprising release means.