JP2009102153A - Safety device in multi-car system elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a multi-car system elevator wherein an emergency brake does not actuate, and a push rod breaks other mechanism of an elevator when the push rod is broken or bent because the push rod should be made long and large in the case where a speed is high, loading mass of a car is large, or a car moving distance required until the car is stopped by an emergency brake is long. <P>SOLUTION: A safety device in the multi-car system elevator comprises: rope 4a fixed to a first car 1a and moving with the first car in a hoistway; an operating piece 12a fixed to the rope while keeping a safety distance from the first car toward a second car 1b; and an emergency stopping means provided on the second car and pushed by the operating piece to press a guide rail and stop the second car. The emergency stop of the multi-car system elevator is ensured without using the push rod. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a safety device for a multi-car elevator having a plurality of baskets in a hoistway.

Japanese Unexamined Patent Application Publication No. 2004-10272 is a safety device for an elevator for preventing collision between cars or reducing impact at the time of collision in a multi-car elevator having a plurality of cages in a hoistway.
An elevator described in Japanese Patent Application Laid-Open No. 2004-10272 includes a push bar that is pushed by the other car when the two cars approach each other and a guide that interlocks with the push bar and stops the movement of the car. The rail pressing means is intended to prevent collision between the cages or reduce impact during collision.

JP 2004-10272 A

In the conventional invention described in Japanese Patent Application Laid-Open No. 2004-10272, it is possible to prevent the collision between the cars or reduce the impact at the time of the collision, but the speed of the car and the load mass are large, and the car is stopped by the emergency brake. When the moving distance of the basket required for this is large, it is necessary to make the push rod long. For this reason, the mass of the basket increases. In addition, when the push rod falls down or bends, the emergency brake is not activated, and the push rod may damage other mechanisms of the elevator.

A multi-car elevator according to the present invention is a multi-car elevator having a first car and a second car in the same hoistway, and is fixed to the first car and moves along the hoistway together with the first car. A rope, a working piece fixed to the rope at a safe distance from the first car to the second car, and a guide rail pressed by the working piece provided on the second car And an emergency stop means for stopping the second basket.

Moreover, in the multi-car system elevator according to the present invention, the operating piece can be freely fixed to the rope.

Further, in the multi-car system elevator according to the present invention, the emergency stop means includes a rotating body that rotates around the fulcrum by being pushed by the operating piece, a pressing body that is connected to the rotating body and presses the guide rail, It is equipped with.

In the multi-car elevator according to the present invention, the operating piece pushes through the rotating body and penetrates.

As described above, the multicar system elevator according to the present invention is a multicar system elevator having a first car and a second car in the same hoistway, and is fixed to the first car and the first car. And a rope that moves in the hoistway, an operating piece fixed to the rope at a safe distance from the first car to the second car, and provided on the second car and pushed by the operating piece. And the emergency stop means for stopping the second car by pressing the guide rail, and the speed of the car and the load mass are large, and the travel distance of the car required for the car to stop by braking by the emergency brake Even when the vehicle is large, the safety of the elevator can be ensured by a simple mechanism.

In the multi-car system elevator according to the present invention, since the operating piece can be freely fixed to the rope, the administrator of the elevator can freely adjust the distance from the second basket to the operating piece. Depending on the speed and load mass of each car, it can be set freely according to the distance required for braking.

Further, in the multi-car system elevator according to the present invention, the emergency stop means includes a rotating body that rotates about a fulcrum by being pushed by the operating piece, and a pressing body that is connected to the rotating body and presses the guide rail. Because of this, even if the speed and load mass of the car is large and the distance required for the car to stop due to braking by an emergency brake is large, the safety of the elevator is ensured by a simple mechanism. can do.

Moreover, in the multi-car system elevator according to the present invention, the operating piece pushes and penetrates the rotating body, so that damage to the rope and the operating lever can be prevented. In other words, if the engagement between the operating piece and the rotating body is not released, the rope tension becomes weak and the tension of the other rope parts becomes abnormally strong, leading to rope breakage and damage to the rotating body. can do.

The elevator will be described with reference to FIG. FIG. 1 is a longitudinal sectional view of the entire system of a general elevator (not a multi-type elevator). In the hoistway, a car 1, a counter weight 2, a car 1 and a hoisting rope 3 connecting the counter weight 2 are disposed. The basket 1 and the counterweight 2 suspended in a manner of hanging on the hoisting rope 3 move up and down in the hoistway in opposite directions. Further, a governor rope 4 of a governor 5 is fixed to the basket 1, and the governor rope 4 is stretched in a ring shape in the hoistway through the governor 5 and a pulley 6 at the bottom of the hoistway. It is arranged to be able to.
In the machine room 7, a sheave 8 around which the hoisting rope 3 is wound, a hoisting machine 9 that drives the sheave 8, and a control device 10 that controls the rotating direction and the rotational speed of the hoisting machine 9 are disposed. The control device 10 controls the raising / lowering operation of the basket 1 (commands for traveling direction, high speed operation, low speed operation, etc.) via the hoisting machine 9. The elevator system is not limited to the one having the machine room 7 as described above. For example, an MRL (machine roomless) type having no machine room may be employed.

2 and 3 are longitudinal sectional views of the hoistway of the multi-car type elevator having two baskets in the present embodiment. As shown in FIG. 2, 1b is a cage located on the upper side in the hoistway, and 1a is a cage located on the lower side. As shown in FIG. 3, the cage 1a arranged on the lower side includes a guide rail pressing means 100a and a guide rail pressing means 200a which are emergency stop means for the cage 1a. The guide rail pressing means 100a stops the downward runaway of the cage 1a, and the guide rail pressing means 200a stops the upward runaway of the cage 1a and prevents a collision with the basket 1b. Further, the basket 1a is provided with a connecting portion 11a for fixing the basket 1a to the governor rope 4a. An operating piece 12a is attached and fixed to the governor rope 4a at a place where a safety distance X is placed upward from the upper end of the cage 1a. The operating piece 12a can be freely fixed to the governor rope 4a, and the distance between the operating piece 12a and the cage 1a can be freely changed according to the braking distance of the emergency stop.

The guide rail pressing means 100a is not for preventing the collision between the cages, but for stopping the runaway in the downward direction of the cage 1a. In the case where the car 1a runs down in the downward direction, the governor 5a grasps the governor rope 4a, thereby the emergency stop of the car 1a is intended.

On the other hand, the cage 1b disposed on the upper side stops the runaway in the downward direction of the cage 1b, guide rail pressing means 200b for preventing the collision with the cage 1a, and the guide rail press for stopping the upward runaway in the cage 1b. Means 100b are provided. The basket 1b is provided with a connecting portion 11b that fixes the basket 1b to the governor rope 4b. An operating piece 12b is attached and fixed to the governor rope 4b at a place where a safety distance Y is provided downward from the lower end of the cage 1b. The operating piece 12b can be freely fixed to the governor rope 4b, and the distance between the operating piece 12b and the cage 1b can be freely changed according to the braking distance of the emergency stop.

The guide rail pressing means 100b is not for preventing collision between the cages but for stopping the runaway in the upward direction of the cage 1b. When the runaway upward of the car 1b, the speed governor 5b grasps the speed governor rope 4b, thereby the emergency stop of the car 1b.

Here, an example of a formula for the safety distances X and Y will be described. The elevator specifications are as follows: Rated speed: 120 m / min, Overspeed detection speed: 156 m / min, Emergency stop operating speed: 168 m / min, Emergency stop deceleration: 0.6 G, Permissible closest distance between upper and lower cages: J = 1 m, distance between the operating lever and the cage end: K = 0.5 m, and the following situation is assumed in consideration of the worst situation.

When the car 1b is running away in the downward direction, the car 1a is running away in the upward direction, the lowering speed of the car 1b when the rotating body described later is operating is an emergency stop operating speed (the lowering speed exceeds the preset emergency stop operating speed). Since the emergency stop is operated by the speed governor, the lowering speed does not exceed this operating speed), the rising speed of the cage 1a when the operating lever is operated is the overspeed detection speed (the overspeed with the rising speed set in advance). If the speed exceeds the detection speed, the governor turns off the elevator power and the brake is applied. Therefore, the ascending speed will not exceed this speed.) First, the car 1b that descends at a speed of 168 m / min has a deceleration of 0.6G. The distance L necessary for stopping is L = (168/60) ² /(2*0.6*9.8)=0.67 m, and the cage 1a rising at a speed of 156 m / min is reduced by 0.6 G. Distance required to stop at speed M is M = (156/60) ² /(2*0.6*9.8)=0.57m Therefore, the distance L + M + J + K = 0.67 + 0.57 + 1.00 + 0 .50 = 2.74 m. Therefore, the safety distances X and Y are usually longer than the distance L. In addition, although it demonstrated on the assumption that the value of distance X and Y was different, it may be the same value.

4 to 7 are detailed views of the guide rail pressing means fixed to the upper part of the car 1a and the lower part of the car 1b. 4 and 5 show details of the B part in FIG. 2, and FIGS. 6 and 7 show details of the A part in FIG. 4 and 6 show a state where the emergency stop is not activated, and FIGS. 5 and 7 show a state where the emergency stop is activated.

The configuration of the guide rail pressing means 200b will be described with reference to FIG. FIG. 4 shows a case where the guide rail pressing means 200b is viewed from above the hoistway. A gap is formed by the cover 13b which is fixed to the guide rail pressing means 200b and has a U-shape and one end of the first operating lever 14b. Although this clearance is sufficient for the governor rope 4a to pass, the gap is adjusted so that the work piece 12a contacts one end of the first operating lever 14b when the work piece 12a passes. It is. In addition, the cover 13b is not limited to what is carrying out the U-shape, What is necessary is just the shape which guides and passes the governor rope 4a. For example, the shape may be a semicircle.

The rotating body that is pushed by the operating piece 12a and pushes up the movable pressing body 18b described later includes, for example, a first operating lever 14b and a second operating lever 15b. The first actuating lever 14b has one end disposed above the actuating piece 12a and the other end fixed to the shaft 16b. Normally, the first actuating lever 14b is arranged substantially parallel to the floor of the car 1b. When the car 1a and the car 1b approach each other, one end is pushed by the working piece 12a and the other end is fixed to the shaft 16b. Therefore, the first actuating lever 14b rotates around the shaft 16b.

Since the other end of the second operating lever 15b is also fixed to the shaft 16b and the angle formed by the second operating lever 15b and the first operating lever 14b is constant, the first operation is performed. When the other end of the lever 14b rotates about the shaft 16, the second operating lever 15b also rotates about the shaft 16 by the same angle. One end of the second operating lever 15b is pushed upward by the rotation of the second operating lever 15b around the shaft 16.

One end of the second operating lever 15b is connected to a movable pressing body 18b that presses the guide rail 17b via a shaft 19b. The movable pressing body 18b is pushed up by one end of the second operating lever 15b and presses the guide rail 17b along an inclined surface having a certain angle with the guide rail 17b.

A fixed pressing body 20b fixed to the car 1b is disposed at a position facing the movable pressing body 18b with the guide rail 17b interposed therebetween. There is a certain gap between the fixed pressing body 20b and the guide rail 17b at normal times (when the car 1a and the car 1b are sufficiently separated). When the movable pressing body 18b is operated by the second actuating lever 15b and the movable pressing body 18b is pressed against the guide rail 17b, the cage 1b is relatively moved by the reaction force from the guide rail 17. For this reason, the fixed pressing body 20b presses the guide rail 17b.

For example, in FIGS. 4 and 5, after the movable pressing body 18b comes into contact with the guide rail 17b, the guide rail 17b does not move because the guide rail 17b is fixed to the hoistway wall, and the cage 1b moves to the right. . Thereby, the fixed pressing body 20b presses the guide rail 17b. Further, when the movable pressing body 18b bites into the guide rail 17b, a frictional force is generated between the movable pressing body 18b and the fixed pressing body 20b and the guide rail 17b, and the cage 1b is stopped.

Similarly, as shown in FIGS. 6 and 7, also in the cage 1a, the guide rail pressing means 100a includes a cover 13a, a first operating lever 14a, a second operating lever 15a, a movable pressing body 18a, and a fixed pressing body 20a. It is composed of

Next, the operation of the multicar elevator according to the embodiment of the present invention will be described. A case where the upper car 1b and the lower car 1a shown in FIGS. 2 and 3 approach each other will be described.

Here, when the car approaches, (i) when the car 1a runs upward and the car 1b runs downward, (ii) the car 1a runs or stops downward, and the car 1b exceeds it. When traveling downward at a speed, (iii) the cage 1b may travel or stop upward, and the cage 1a may travel upward at a speed higher than that. This will be sequentially described below.

(I) When the car 1a travels upward and the car 1b travels downward When the car 1a and the car 1b approach due to control runaway or the like, in the guide rail pressing means 200b provided in the car 1b, the operating piece 12a is The first operating lever 14b is contacted and pushed. Since one end of the first operating lever 14 b is pushed upward, the first operating lever 14 b rotates about the shaft 16. Since the first operating lever 14b and the second operating lever 15b are always designed to have a constant angle, the other end of the second operating lever 15b rotates around the fixed shaft 16b. . Due to the rotation of the second operating lever 15b, one end of the second operating lever 15b pushes the movable pressing body 18b upward. At this time, the movable pressing body 18b moves along the slope fixed to the car 1b in advance as shown in FIGS. 4 and 5, and presses the guide rail 17b. Moreover, the fixed pressing body 20b presses the guide rail 17b by the reaction force from the guide rail 17b. That is, after the movable pressing body 18b comes into contact with the guide rail 17b, the guide rail 17b does not move because the guide rail 17b is fixed to the hoistway wall, and the cage 1b moves relatively to the right. Thereby, the fixed pressing body 20b and the guide rail 17b contact and press. Furthermore, when the movable pressing body 18b bites into the wedge, a frictional force is generated between the movable pressing body 18b, the fixed pressing body 20b, and the guide rail 17b, and the cage 1b is stopped.

Similarly, in the cage 1a, as shown in FIGS. 6 and 7, the guide piece 17a is pressed by the movable pressing body 18a and the fixed pressing body 20a when the operating piece 12b pushes the rotating body. Since the car 1a that has traveled upwards is stopped, a frictional force is generated between the movable pressing body 18a and the guide rail 17, and the frictional force causes the pressing body relatively to the car 1a. 18a moves downward along the slope. For this reason, the pressing force for braking the guide rail 17a by the pressing body 18a is further increased. Thereby, the collision of the two baskets 1a and 1b can be prevented.

(Ii) When the cage 1a travels or stops downward and the cage 1b travels downward at a speed higher than that, when the cage 1b approaches the cage 1a due to control runaway or the like, the guide rail provided in the cage 1b In the pressing means 200b, the operating piece 12a contacts and presses the first operating lever 14b. Since one end of the first operating lever 14 b is pushed upward, the first operating lever 14 b rotates about the shaft 16. Since the first operating lever 14b and the second operating lever 15b always have a constant angle and the other end of the second operating lever 15b is fixed to the shaft 16b, the second operating lever 15b It rotates around the axis 16b. By the rotation of the second operating lever 15b, the other end of the second operating lever 15b pushes the movable pressing body 18b upward. At this time, the movable pressing body 18b moves along the slope and presses the guide rail 17b.

A frictional force is generated between the movable pressing body 18b and the guide rail 17b, and the movable pressing body 18b moves upward along the slope relative to the car 1b by this frictional force. For this reason, the pressing force for further braking the guide rail 17b by the movable pressing body 18b becomes stronger.

On the other hand, in the cage 1a, when the operating piece 12b presses the first operating lever 14a, the guide rail 17a is instantaneously pressed by the movable pressing body 18a. For this reason, a frictional force is generated between the movable pressing body 18a and the guide rail 17a. By this frictional force, the movable pressing body 18a moves upward along the slope relative to the car 1a. For this reason, the pressing force which brakes the guide rail 17a by the movable pressing body 18a does not arise.

As a result, the car 1b stops suddenly, whereas the car 1a does not stop suddenly. For this reason, the collision of the two baskets 1a and 1b is avoided.

(Iii) When the cage 1b travels or stops upward and the cage 1a travels upward at a speed higher than that, when the cage 1a approaches the cage 1b due to a control runaway or the like, a guide rail provided in the cage 1a In the pressing means 200a, the operating piece 12b contacts and pushes the first operating lever 14a. Since one end of the first operating lever 14a is pushed downward, the first operating lever 14a rotates around the shaft 16a. Since the first operating lever 14a and the second operating lever 15a always have a constant angle and one end of the second operating lever 15a is fixed to the shaft 16a, the second operating lever 15a also has a shaft. It rotates around 16a.
Due to the rotation of the second operating lever 15a, one end of the second operating lever 15a pushes the movable pressing body 18a downward. At this time, the pressing body 18a moves along the slope and presses the guide rail 17a.

A frictional force is generated between the movable pressing body 18a and the guide rail 17a, and the movable pressing body 18a moves downward along the slope relative to the car 1a. For this reason, the pressing force for braking the guide rail 17a is further increased by the movable pressing body 18a.

On the other hand, in the cage 1b, when the operating piece 12a presses the first operating lever 14b, the guide rail 17b is instantaneously pressed by the movable pressing body 18b. For this reason, a frictional force is generated between the movable pressing body 18b and the guide rail 17b. By this frictional force, the movable pressing body 18b moves downward along the slope relative to the car 1b. For this reason, the pressing force which brakes the guide rail 17b by the movable pressing body 18b does not arise.

As a result, the car 1a stops suddenly, whereas the car 1b does not stop suddenly. For this reason, the collision of the two baskets 1a and 1b is avoided.

It is a figure which shows the structure of a general elevator. It is a figure which shows the whole structure of the multi-elevator in this Embodiment. It is a figure which shows the relationship between the two baskets in this Embodiment. It is a figure which shows the B section detail in FIG. It is a figure which shows the B section detail in FIG. It is a figure which shows the A section detail in FIG. It is a figure which shows the A section detail in FIG.

Explanation of symbols

Basket 1, counterweight 2, guide rail pressing means 100a, guide rail pressing means 200a, guide rail pressing means 100b, guide rail pressing means 200b, hoisting rope 3, governor rope 4, governor 5, pulley 6, machine Chamber 7, sheave 8, hoisting machine 9, control device 10, connecting portion 11, operating piece 12, cover 13, first operating lever 14, second operating lever 15, shaft 16, guide rail 17, movable pressing body 18, shaft 19, fixed pressing body 20

Claims (4)

In a multi-car system elevator having a first car and a second car in the same hoistway,
A rope fixed to the first car and moving along a hoistway with the first car;
An operating piece fixed to the rope at a safe distance from the first car to the second car;
Emergency stop means for stopping the second basket by pressing the guide rail by being provided on the second basket and being pushed by the operating piece;
A multi-car elevator characterized by comprising The operating piece can be freely fixed to the rope;
The multi-car system elevator according to claim 1, wherein: The emergency stop means is
A rotating body that rotates around a fulcrum by being pushed by the operating piece;
A pressing body connected to the rotating body and pressing the guide rail;
The multi-car elevator according to claim 1 or 2, further comprising: The operating piece is
Pushing and penetrating the rotating body;
The multi-car system elevator according to claim 3.

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