JPS59212371A - Elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a traction-type elevator that is obtained by winding a main lobe provided on the output shaft of a main lobe hoisting machine and by friction between the groove of the main sheave and the main rope. Regarding.

[Technical background of the invention and its problems]

Conventionally, as shown in Fig. 1, a traction type elevator has a main rope 2 wound around a main sheep L of a hoist placed in a machine room, a heel 3 at one end of the main lobe 2, and a heel 3 at the other end I. : A counterweight 4 is provided to create a frictional force between the main sheave 1 and the main rope 2 of the hoist! At the same time, the control device controls the speed of the hoist and causes it to land on the nearest floor.

At this time, the main sheave 1 is directly braked and mechanically locked by a braking device built into the hoisting machine.

By the way, in a traction-type elevator, when the main sheave 1 is stopped, there is a difference in tension acting on the main lobe 2 of the counterweight 4 and the main sheave 3, and due to the friction sheave, traction (there are two limits. In other words, the main sheave l
Tracrayons differ depending on the groove shape and the corner, which exceeds the limit! In this case, it is conceivable that the main lobe 3 may slip even though the main V-11 is stationary.

Particularly in cargo elevators, etc., when loading and unloading objects, a forklift or other cargo machine is used, so when the cargo handling machine itself gets into the car, it becomes temporarily overloaded, and at this time the main sheave L and The above-mentioned phenomenon may occur when the static friction with the main rope 2 exceeds 1 small limit, making the loading and unloading of bulky objects dangerous. For this reason, in the past, measures were taken to make the Vf center thicker and the corner Z of the makikawa thicker in order to achieve traction, but there was a strength limit, and the m center of the upper right moxibustion itself crystallized, resulting in earthquake resistance and economical problems. There was also a problem.

[Purpose of the invention]

The present invention was made in order to eliminate the conventional drawbacks,
The purpose is to prevent the main rope from slipping by preventing the tension difference between the loads on both sides of the main rope from increasing.

[Summary of the invention]

When the elevator is stopped and an excessively large load is loaded on the initial car, the main rope tension ratio of the car and counterweight exceeds the limit of 7, and the main rope tension ratio is kept within the limit (to prevent the main rope from slipping). It has two shafts and one that brakes the rope itself, which mechanism is installed near the deflection sheave.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

In Fig. 2, a machine beam installed in the elevator machine room is mounted on the machine beam with anti-vibration rubber, etc.
1 degree, and a groove in which the main rope 2 engages is provided on the outer periphery of a main sheave I mounted on the output shaft of the hoist.

Both ends of the main rope 2 wound around the groove are lowered into the bamboo path, and a heel 3 is attached to one end and a counterweight 4 is attached to the other end, and the rope is suspended via a deflecting sheave 5 on one side. .

A braking mechanism 6 is provided on the outside of the main rope 2 in contact with the deflecting sheave 5 so as to face the deflecting sheave 5.

This braking mechanism 6 includes a lever 9 which is rotatably attached to an identification table 7 by a shaft 8, and a V knee 10 is bonded or fastened to the opposite surface of the deflection sheave 5 which is attached to the main rope 2 side of the lever 9. It is fixed.

Furthermore, one end of an electromagnetic device 12 for rotating the lever 9 is coupled to the end 11 of the lever 9 in a link shape, and the other end is rotatably attached to a fixed base t3 via a shaft 14. It's being talked about.

When the electromagnetic device 12 is energized, the end 11
and the distance C11k of the axis 141iJ is extended and deenergized (deenergized).
It is equipped with a MH7t that expands and contracts when it is turned.

Further, the electromagnetic device 12 of the operating device can be replaced with any other expandable/retractable device such as a hydraulic cylinder or a pneumatic cylinder.

According to the above configuration, when the elevator has landed at the nearest floor and a forklift carrying a large amount of cargo is simultaneously loaded into the car, if excess weight is expected, the control device is activated in advance. The built-in braking mechanism 6 is activated to release the shoe from the main rope and separate it when the brake mechanism 6 is not working.

That is, the control flI mechanism 6 energizes the electromagnetic device 12,
By rotating the shaft 8 of the lever 9 clockwise as a pivot hinge, the shoe 10 presses the main rope 2 and deflects it against the sheave 5, thereby separating the main rope 2 and the shoe 10.
By increasing the frictional force between the main rope 2 and the deflection sheave 5, the main rope tension between the main sheep 2 and the deflection sheave 5 is increased by 11.

This means that when the car 3 side is loaded, a tension A is generated, and when the main sheep l is stopped, the main rope 2 is stationary.
This occurs when s'< ・IB, so in order to prevent this, the braking mechanism 6 increases the tension on the part of the main rope 2 passed between the main sheep l and the deflection sheave 51, thereby reducing the tension difference. can be made smaller.

〔Effect of the invention〕

As a result of the above, when landing on the nearest floor, there are cases where oversized baggage such as ID items is constantly loaded or accidentally overloaded.
When the system of the present invention #J3. Q: If you have a oak tree, you can prevent the h1 drop from happening.

With the rise of high-rise buildings, there are an increasing number of people using elevators for large and small items to carry &-1 speculators into the temple. By doing so, even if there is a temporary increase in the number of items, such as excess baggage in the basket, 773 will not be dropped due to unloading of baggage.

The tension on the main lobe side in the straw and main sheep can be adjusted to within 7 + - lJd by the invention.

However, the main lobe's 75° angle may be 74°, and the center of gravity of the hoist will not be raised and there will be no problem in terms of earthquake resistance.

Further, the main sheave groove does not need to have a special groove shape, and may be a general undercut type.

Therefore, in the present invention, even if the force for directly gripping the main lobe is small, it can sufficiently support the IB overload on the car side, and other great effects can be obtained.

[Brief explanation of the drawing]

1st lb+ is a simplified overview of conventional elevators 411
Figures 1 and 2 are side views of the main parts of the present invention, 4...
・Main sheep, 2... Main lobe, 5...
・Deflection sheep, 6...braking mechanism, IO...
Whoosh. (7317) Agent Patent Attorney Noriyuki Chika (Idiot 1)
given name)

Claims (1)

[Claims] The output shaft of the hoist (a main sheave attached to two shafts, a main rope wound through a deflecting V-beam provided near the main sheave, and a portion of the main rope wound around the deflecting sheave) An elevator characterized by being equipped with a braking mechanism that presses or separates a shoe from the outside.