JPS60179535A - Brake device in elevator - Google Patents

Abstract

PURPOSE:To reduce braking distance and shock upon stop of an elevator having a brake device, by disposing a resilient member between an electromagnetic coil for braking a drive unit and a reduction gear unit, and a shoe arm. CONSTITUTION:There is provided a resilient member between an electromagnetic coil 10 for braking a drive unit and a reduction gear unit in a brake device, and the shoe arm 16 of a brake shoe 16. Accordingly, the forces of a brake spring 19 and the resilient member 21 are at least cancelled out therebetween without the brake shoe 16 being separated from a brake drum 4 at one time, and a force having an amount with which the brake spring 19 overcomes the resilient member 21, is effected as a braking force to the brake shoe 16. Thereby, there may be provided a brake device having a characteristic variation which may eliminate shock upon stop.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electromagnetic brake device for a drum type elevator.

[Traces of the invention” signpost and electric point between them]

Since the drum type elevator does not have a counterweight, the operating characteristics of the elevator when going up and down are extremely different.

That is, the winding drum is configured so that the rope can be wound around the entire lifting stroke. When there is no load, a rotational moment due to the weight of the corner acts on the winding drum, and when there is a load, a rotational moment proportional to the amount of snow acts on the winding drum.

The hoisting machine that brakes the winding machine has a brake device built into the reducer, and a brake device with a capacity commensurate with the braking torque is adopted.

χ has a great influence on the braking action during climbing, mechanic operation, and JFC mode, and when climbing, the weight of the car and the applied load act as a sum on the braking force side, so the braking distance is short, and may even be too short. many.

On the other hand, when landing on the nearest floor or the like during descending operation, the braking distance becomes longer because the vehicle's own weight and load l act on the braking force as area-side power. The above appears as an extreme difference in braking distance.

In addition, if we look at the above from typical driving characteristics such as ride comfort, 1
If the braking characteristics of two brake devices are constant when ascending and descending, the problem is that when ascending, the stop shock and stopping force vary depending on the load, and when descending, the braking distance increases, making it difficult to maintain the landing stability. In any case, there are concerns about riding comfort and safety when getting on and off due to the difference in height when landing on the floor.

However, in conventional drum type elevators, when ascending and descending, 1
Since it had two brakes and a single electromagnetic coil, it was not possible to control the braking force by changing it when going up and down.

[Purpose of the invention]

The present invention was made in order to solve the above-mentioned drawbacks, and the present invention is made by configuring an element that changes the braking force in one brake device and dealing with the 1'' dynamic torque difference between ascending and descending. The purpose is to reduce braking distance and stop impact, thereby achieving ride comfort and high landing axis.

[Summary of the Invention] The present invention provides a reduction gear provided with a drive on the input side, a winding drum that engages with the output shaft of the reduction gear, and a reduction gear that is incorporated into the drive or the reduction gear for commercial use. When the electromagnetic coil is energized, the electromagnetic force releases the brake shoe from the brake drum via the shoe arm, and when the electromagnetic coil is energized, the coil is deenergized and the brake spring that is pressed via the shoe arm is released onto the brake shoe. In the case where the electromagnetic coil and the shoe arm are engaged with each other, an elastic member such as a spring member is interposed between the electromagnetic coil and the shoe arm to gradually open and close the brake.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings.

In Figs. 1 and 2, for example, a mechanical hoist is equipped with a hoist M, and a rope 2 is attached to the hoist 1 suspended from the hoistway.
As mentioned above, the drum type elevator that raises and lowers the elevator has a large braking difference when going up and down, so there are many problems when landing on the floor.
Change characteristics during braking were absolutely required.

Therefore, in the present invention, a drive unit 3 is attached to the input side shaft 6 of a reduction gear 5 in a hoisting machine M, and a brake drum 4 is provided on the same axis, and an electromagnetic coil or a brake spring that interlocks with a brake shoe that engages on the outer periphery of the drive unit 3 is provided. Brake device Br equipped with etc.
T-Attach to apply braking when landing on the floor, etc.

Incidentally, the reduction gear 5 has recently been reconsidered in terms of transmission efficiency, with spur gear type reducers such as helical and double wheels being energy-saving. The product of the radius R and the load W, that is, the moment M
-KW conditions overlap and the braking difference during ascending and descending is further exacerbated, making it necessary to have a wide range of braking characteristics.

As shown in FIG. 3, the present invention provides a brake device Br
A support 7 attached to the main body has a coil 8 therein, and an electromagnetic coil 10 consisting of nine yoke irons 9 (magnetic path) is provided, and a male and female iron core 11a formed in a conical or concave shape at the center thereof. ,
At the same time, a mm body 15 is attached to the outer side thereof, which has a threaded part that allows the 17 member 12 and an adjusting member 13 such as a nut to be seen, and a threaded part that can be screwed to the iron 11b.

The iron cores 11a and 11b are provided in the cylindrical direction so that the iron cores can move forward and backward by energizing and de-energizing the electromagnetic coils.

On the other hand, the brake drum 4 is integrally and coaxially attached to the input shaft 2 (or drive shaft), and its outer circumference is formed into a cylindrical shape, and brake shoes 1 are arranged symmetrically from the left and right on that surface.
6 is fixedly attached to the shoe arm 17.

The shoe arm 17 is engaged with the fulcrum 7a, one side is engaged with the adjustment body 15 of the electromagnetic coil 10, and the other side is connected to the outside of the connecting rod 18 via an adjustment stopper 188 to connect the left and right shoe arms 17.
When the brake spring 19 of the first elastic member is applied to the outside of one end of the first elastic member and the stop member 20 is attached to the other end, the adjustment stopper 188 is moved inward to generate a spring force in the brake spring 19.

Further, on the adjustment body 15, abutting the shoe arm 17,
In addition, a second elastic member 21 inserted between the adjustment members 13 is interposed.

In this way, the attraction characteristic of the electromagnetic coil 10 is the iron core 11a.

By combining this with the second elastic member 21, the brake shoe 16 is moved to the brake drum at once by combining this with the second elastic member 21. 4, at least the first brake spring 19 and the second elastic member 21 are made to cancel each other out, and the amount that the brake spring 19 overcomes is applied to the brake shoe 16 as a braking force.

That is, as a brake device Br)
According to the present invention, the process is roughly divided into three stages.

As shown in FIG. 4, the brake is completely released, and the second elastic member 21 is almost completely deflected by the attractive force of the electromagnetic coil engaged with the shoe arm 17 and the adjusting body 15.

FIG. 5 shows a state in which the second elastic member 21 is slightly bent by the attraction force of the electromagnetic coil, thereby canceling out the braking force to some extent.

If this state is used for stopping braking force during upward and backward movement, the braking action will not be the full brake torque, but a damped stopping action will be obtained.

In FIG. 6, the brake spring is fully applied, and the second elastic member 21 is completely released.

Therefore, in this case, when used during descending operation, the brake torque is maximum and υ is suitable.

Although the second elastic member 21 is shaped like a plate spring, it can be simply replaced with a plate spring, a coil spring, or the like.

Further, the second elastic member may be provided on the adjustment member 15.

According to the above, when stopping during ascending operation, the electromagnetic coil is auxiliary energized (the excitation current remains energized), and the second elastic member is slightly bent to weaken the action of the brake splash. (reducing the brake torque) to land on the nearest floor, and then release the auxiliary bias to maintain the stopped state.

On the other hand, when stopping during descending operation, the electromagnetic coil is completely deenergized and all brake springs are applied, thereby landing on the nearest floor.

Thus, at startup, the electromagnetic coil is energized to bend the first brake spring (elastic member) and the second elastic member, thereby separating the brake shoes from the brake drum and driving the vehicle.

[Overall effects of the present invention]

According to the present invention, a second elastic member is interposed in the electromagnetic force of the brake and the brake shoe operating part, and when the brake is stopped during ascending operation, it acts to reduce the brake container of the brake, thereby eliminating the stopping shock. A brake with characteristic changes that can be obtained is obtained.

[Brief Description of the Drawings] Fig. 1 is a side view of the elevator, Fig. 2 is a front view of Fig. 1, Fig. 3 is a front view of the pre-kicking device of the present invention, and Figs. 4 to 6 are FIG. 4 is an explanatory diagram of the operation of FIG. 3; 3... Drive i 4 Brake drum 5 Reducer 5a Output shaft 10 Electromagnetic coil 16- Brake shaft 17/Shoe arm 19 First elastic member 21 Second elastic member (7317) Agent Patent attorney Rule Yu Kondo (1 idiot) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A reduction gear provided on the input side of the drive machine, a winding drum that engages with the output shaft of this reduction gear, and a winding drum that is incorporated into the drive machine or reduction gear for braking, and which is energized by an electromagnetic coil to brake with its electromagnetic force. A brake shoe is released from a drum via a shoe arm, and a first elastic member such as a spring that deenergizes the electromagnetic coil and presses it via the shoe arm during braking is engaged with the brake shoe, wherein the electromagnetic coil A brake device for an elevator in which a second elastic member is interposed between the shoe arm and the shoe arm.