JPH0726600U - Speed governor such as shutter - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a speed governor such as a shutter that constitutes a governor from a single member and that can regulate the descending speed of the slat when the slat descends by its own weight. To aim. [Structure] Engagement portion 16 in which drive shaft 2 of a switch is inserted
A weight portion 17 having a friction surface 17a, and an engaging portion 16
A governor is integrally formed from the variable support piece 18 that connects the weight part 17 and the friction part 17a as the drive shaft 2 rotates.
Is in sliding contact with the inner peripheral surface of the governor casing 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a speed governor attached to an opening / closing device, and more particularly to a speed governor that regulates the descending speed of the shutter curtain when the shutter curtain is lowered by its own weight in the event of a power failure or disaster prevention. It is a thing.

[0002]

[Prior art]

 In the event of an emergency such as a fire or power failure, the shatter-caten is lowered by its own weight by pulling a descent string, and in such a case, the shutter speed is controlled to control the descent speed. The speed governor is attached to the machine. FIG. 1 is a front view showing a conventional speed governor. In the speed governor 1, a boss 3 is mounted on a drive shaft 2 of an opening / closing machine, and governor bodies 4, 4 are opposed to each other with the drive shaft 2 as a center. The governor bodies 4 and 4 are urged in the opposite directions by springs 5 while being provided so as to be able to open freely. When the drive shaft 2 rotates, the governor bodies 4 and 4 are opened by centrifugal force, and the friction plates 6 and 6 provided facing the side portions of the governor bodies 4 and 4 hit the inner peripheral surface of the governor casing 7. The sliding contact makes it possible to brake the rotation of the drive shaft 2. In the figure, 8 and 8 indicate auxiliary weights. However, the conventional speed governor has a large number of parts as described above, and the cost is high due to the necessity of assembling the parts.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above-mentioned conventional art with the object of improving it, and has a simple structure formed from one member, but at the time of slat's own weight lowering, An object of the present invention is to provide a speed control device such as a shutter that can regulate the descent speed of slats.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the technical means adopted by the present invention has an engaging portion through which the drive shaft is inserted so that the governor rotates in accordance with the rotation of the drive shaft of the opening / closing machine, and a friction surface. A governor is integrally formed from a weight portion and a variable support piece that connects the engaging portion and the weight portion, the support piece is deformed when the drive shaft rotates, and the friction surface of the weight portion is included in the governor casing. It is characterized in that the rotation of the drive shaft is braked by slidingly contacting the peripheral surface.

[0005]

[Action]

 Since the present invention is configured as described above, the governor rotates in synchronization with the rotation of the drive shaft of the opening / closing machine, the centrifugal force of the weight portion deforms the support piece, and the friction surface of the weight portion becomes the governor cover. -Brakes the rotation of the drive shaft by making sliding contact with the inner peripheral surface of the thing.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to an illustrated embodiment. FIG. 2 shows a side view of the shutter device. The shutter device opens and closes the opening by winding the slat 10 from the winding drum 9 or winding the slat 10 on the winding drum 9. It has become. The slat 10 is unwound and unwound by the opening / closing machine 11, the sprocket 12 is fixed to the drive shaft of the opening / closing machine 11, and the chain 14 is wound around the sprocket 13 of the winding drum 9 of the slat. As a result, the driving force of the switch 11 is transmitted to the winding drum 9. Also, in the event of an emergency such as a fire, the brake is released so that the slat 10 can descend by its own weight.

FIG. 3 is a simplified side view of the switchgear showing the mounting position of the speed governor, in which G is a reduction gear, M is a motor, and B is a brake. The speed device 1 is located between the motor M and the brake B.

FIG. 4 shows a speed governor according to the present invention, in which the speed governor 1 comprises a governor 15 integrally formed of a resin material. The governor 15 includes an engaging portion 16 through which the drive shaft 2 is inserted, weight portions 17 and 17 provided with the friction surfaces 17a and 17a facing each other around the engaging portion, an engaging portion 16 and a weight. The frictional surfaces 17a and 17a of the weight portions 17 and 17 facing the governor casing 7 follow the inner surface shape of the governor casing 7. When the drive shaft 2 rotates, the centrifugal force of the weight portions 17, 17 deforms the support pieces 18, 18, 18, 18 made of a resin material, and the friction surfaces of the weight portions 17, 17 are deformed. The rotation of the drive shaft 2 is braked by abutting 17a, 17a on the inner peripheral surface of the governor casing 7 and slidingly contacting them.

The operation of the speed governor 1 configured as described above will be described. In an emergency such as a fire, the brake B is released so that the slat 10 can be lowered by its own weight. For example, in the case of the manual type, the slat 10 is lowered by pulling a not-shown descent string to open it. Close the department. The take-up shaft and the drive shaft 2 of the opening / closing machine 11 are interlockingly connected, and the drive shaft 2 rotates as the slat 10 descends. When the drive shaft 2 rotates and the governor 15 rotates, a resin having elasticity is used. The supporting pieces 18, 18, 18, 18 made of material are deformed by centrifugal force, and the friction surfaces 17a, 17a of the weight portions 17, 17 are brought into sliding contact with the inner peripheral surface of the governor casing 7. Since the weight portions 17 and 17 are made of a resin material having a large friction coefficient, the friction surfaces 17a and 17a are brought into sliding contact with the inner peripheral surface of the governor casing 7, thereby braking the rotation of the drive shaft 2 and slats. A descent rate of 10 can be regulated. In this embodiment, since the governor is molded with the resin material, it is lighter in weight and smaller in inertia moment than the conventional governor, so that the load on the reducer and the brake is reduced. .

Further, the invention according to the present application is not limited to the shape of the embodiment, and the point is that it rotates with the rotation of the drive shaft, the support piece is deformed during rotation, and the friction surface of the weight portion is changed. Any number may be used as long as it is in sliding contact with the inner peripheral surface of the governor casing, and the number of weight portions and supporting pieces is not limited to that in the embodiment. Incidentally, it is optional to mix a weight such as lead in the weight portion or to form the friction surface of the weight portion with a material having high wear resistance.

[0011]

EFFECTS OF THE INVENTION In summary, the present invention provides an engaging portion through which the drive shaft is inserted so that the governor rotates as the drive shaft of the switchgear rotates, a weight portion having a friction surface, and an engaging portion. A governor is integrally formed from a variable support piece that connects the weight part and the weight part, and when the drive shaft rotates, the support part is deformed, and the friction surface of the weight part slides on the inner peripheral surface of the governor casing. Since the rotation of the drive shaft is braked, the number of parts can be significantly reduced as compared with the conventional governor composed of a plurality of members, and the cost can be reduced. The centrifugal force of the weight part during rotation deforms the support piece, and the friction surface of the weight part slides on the inner peripheral surface of the governor casing to brake the rotation of the drive shaft. Although it is molded to have a simple structure, the rotation of the drive shaft can be reliably braked.

[Brief description of drawings]

FIG. 1 is a front view showing a conventional speed governor.

FIG. 2 is a side view of a shutter device.

FIG. 3 is a simplified side view of the switch.

FIG. 4 is a front view showing a speed governor according to the present invention.

[Explanation of symbols]

 1 Governor 2 Drive shaft 3 Boss 4 Governor body 5 Spring 6 Friction plate 7 Governor casing 8 Auxiliary weight 9 Winding drum 10 Slat 11 Opener 12 Sprocket 13 Sprocket 14 Chain 15 Governor 16 Engagement part 17 Weight part 17a Friction surface 18 Support piece G Reduction gear M Motor B brake

Claims (1)

[Scope of utility model registration request] 1. An engaging portion having the drive shaft inserted therein so that the governor rotates in accordance with rotation of a drive shaft of an opening / closing device, a weight portion having a friction surface, and the engaging portion and the weight portion are connected to each other. A governor is integrally formed with the variable support piece, the support piece is deformed when the drive shaft rotates, and the friction surface of the weight portion slides on the inner peripheral surface of the governor casing to brake the rotation of the drive shaft. A speed control device such as a shutter characterized by the above.