JPH0715668U - Braking equipment for low press elevators - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the braking system that keeps the car stopped in a low press elevator that does not use a main rope or counterweight. [Structure] Guide part 20 fixed to the car during operation
However, the guide rail 3 is grasped via the braking shoe 22. Therefore, if the car is operated when the car descends, the guide portion 20 also descends as the car descends, and the braking shoe 22 bites between the guide portion 20 and the guide rail 3 to prevent the car from descending. On the contrary, if the car is operated when the car is raised, the guide portion 20 is also raised as the car is raised, and the braking shoe 22
Is relatively lowered and is disengaged from between the guide portion 20 and the guide rail 3, so that the raising of the car is not prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a car braking device provided in a low press elevator that is driven by a linear motor or the like and moves up and down a car without using a main rope or a counterweight.

[0002]

[Prior art]

 FIG. 5 is a diagram showing a conventional low press elevator described in, for example, Japanese Patent Laid-Open No. 4-201964. In the figure, on the side wall 1 of the hoistway, a large number of primary coils 2 are arranged vertically and a pair of guide rails 3 are provided. A plurality of secondary conductors 5 are arranged so as to face the primary coil 2 in a car 4 that moves up and down in the hoistway, and the primary coil 2 and the secondary conductor 5 constitute a linear motor.

Roller guides 7 that roll along the guide rails 3 are provided on the top, bottom, left, and right of the car 4, and at the bottom, braking that operates when the car 4 is stopped and maintains the stopped state of the car 4 is performed. A device 8 is provided. In this braking device 8, as shown in FIG. 6, a control shoe 9 for gripping the guide rail 3 from both sides is fixed to one end of each lever 10, and each lever 10 is rotatable about a pin 11 as an axis. Is attached to.

A compression spring 12 is provided between the other ends of the levers 10, and each braking shoe 9 is pressed against the guide rail 3 by the pressing force of the spring 12. Reference numeral 13 is a rod connected to the other end of each lever 10, and 14 is an electromagnet. When the electromagnet 14 is excited, the rod 13 is attracted and both levers 10 compress the spring 12 to rotate. , Each braking shoe 9 is separated from the guide rail 3.

Next, the operation of the braking device 8 will be described. When the start command for the car 4 is issued, the braking device 8 is deactivated. That is, the electromagnet 14 is excited, the rod 13 is attracted, and the braking shoe 9 separates from the guide rail 3. When the car 4 moves up or down and stops at the target floor, the braking device 8 is activated. That is, the electromagnet 14 is de-excited, and each braking shoe 9 holds the guide rail 3 and holds the car 4 in a stopped state. In this way, the braking device 8 operates so as to maintain the stopped state of the car 4 every time the car 4 stops at the destination floor.

However, in the case of the braking device 8 described above, when the braking device 8 is activated due to a power failure or an abnormality while the car 4 is rising, the car 4 suddenly stops and the passengers inside the car 4 float up. In this case, there is a risk that passengers may collide with the ceiling of the car 4.

Therefore, conventionally, when the traveling direction of the car 4 is detected and the braking command is issued while the car 4 is rising, the braking device 8 is not operated until the car 4 stops, The operation of the braking device 8 during the ascent of 4 was prevented. Further, it has been considered to use a battery as a measure for preventing the electromagnet 14 from being de-excited due to a power failure and the braking device 8 from operating.

[0008]

[Problems to be solved by the device]

 However, the above method requires a special control device for controlling the operation of the braking device 8 according to the traveling direction of the car 4 and also requires a battery. The present invention is intended to solve the above problems, and prevents a sudden stop while the car is rising without using a special control device or a battery.

[0009]

[Means for Solving the Problems]

 According to the present invention, a braking device is provided with a guide part having an inclined surface whose upper part is inclined toward the guide rail, and a braking shoe arranged on the guide rail side of the guide part. It is configured to hold the car in a stopped state by being sandwiched between it and the guide rail.

[0010]

[Action]

 In the braking device of the present invention, since the upper part of the guide part is inclined toward the guide rail side, the wedge effect of the braking shoe has a braking effect when the car descends, but when the car ascends, There is almost no braking effect. Therefore, it is possible to prevent the car from descending, and it is possible to prevent a sudden stop while the car is rising.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a braking device of this embodiment, a diagram corresponding to FIG. 6, and FIG. 2 is a sectional view taken along line AA of FIG. In the figure, the same reference numerals as those in FIG. 6 indicate the same parts, and the guide rail 3 side of the lever 10 constitutes a guide portion 20 which is inclined so that its upper portion approaches the guide rail 3 side.

Reference numeral 21 denotes a guide plate fixed to the guide portion 20, reference numeral 22 denotes a triangular braking shoe, which faces the inclined surface of the guide portion 20 via the roller 23 and is engaged with the guide plate 21 by a groove 24. It is guided by and can be moved up and down. Reference numeral 25 denotes a support rod fixed to the upper end of the braking shoe 22 and penetrating the guide portion 20, and the weak compression spring 26 supports the braking shoe 22. It should be noted that, when the braking device is in the non-operating state, that is, the guide portion 20 is away from the guide rail 3, the braking shoe 22 may not come into contact with the guide rail 3 due to vibration during operation of the car 4. It is set.

The operation of this embodiment will be described. When a command to start the car 4 is issued, the electromagnet 14 attracts the rod 13, compresses the spring 12, and the guide portion 20 moves away from the guide rail 3, whereby the braking shoe 22 moves from the guide rail 3. Leave. When the car 4 moves up or down and stops at the target floor, the electromagnetic stone 14 is de-excited, and the spring 12 causes the guide portion 20 to move in the direction of gripping the guide rail 3. Therefore, the brake shoe 22 is pushed by the guide portion 20 and holds the guide rail 3 to hold the stopped state of the car 4.

Next, a case where the braking device operates due to a power failure or the like while the car 4 is moving up and down will be described. First, when the braking device operates while the car 4 is descending, the guide portion 20 grips the guide rail 3 via the braking shoe 22. As a result, the braking shoe 22 is pressed against the guide rail 3. When the car 4 further descends, the guide portion 20 fixed to the car 4 also descends, so that the braking shoe 22 bites between the inclined portion of the guide portion 20 and the guide rail 3 to prevent the car 4 from descending. .

On the contrary, when the braking device operates while the car 4 is rising, the guide portion 20 grips the guide rail 3 via the braking shoe 22 and the braking shoe 22 is pressed against the guide rail 3 in the same manner as above. . However, when the car 4 rises, the guide portion 20 also rises and the braking shoe 22 relatively descends, and the pushing force of the braking shoe 22 against the guide rail 3 by the guide portion 20 disappears. It does not prevent the rise of 4.

In this case, the car 4, which has no driving force due to a power failure or the like, eventually has a rising speed of zero due to natural deceleration due to gravity. After that, when the car 4 tries to move in the descending direction, the braking shoe 22 bites between the guide portion 20 and the guide rail 3, and the car 4 is prevented from descending. As described above, according to this embodiment, it is possible to prevent a sudden stop while the car is rising, without using a special control device or a battery.

Another embodiment of the present invention will be described with reference to FIGS. 3 is a view corresponding to FIG. 2, and FIG. 4 is a sectional view taken along the line BB of FIG. 3, and the same reference numerals as those in FIGS. 1 and 2 designate the same parts. In the figure, 30 is a pulling rod connected to the braking shoe 22, 31 is a lever having an intermediate part pivotally attached to the car 4 by a pin 32, a pulling rod 30 at one end, and a rod 13 at the other end, Reference numeral 33 is a guide portion fixed to the car 4. In this embodiment, when the electromagnet 14 is de-excited, the spring 12 pulls up the pulling rod 30 and the braking shoe 22 is bitten between the guide rail 3 and the guide portion 33 to keep the car 4 stopped. . In addition, by exciting the electromagnet 14, the spring 12 is compressed, the pull-up bar 30 is pushed down, and the braking shoe 22 is separated from between the guide rail 3 and the guide portion 33.

Next, a case where the braking device operates due to a power failure or the like while the car 4 is moving up and down will be described. First, when the braking device is operated while the car 4 is descending, the braking shoe 22 is pulled up and bites between the inclined portion of the guide portion 33 and the guide rail 3 to prevent the car 4 from descending. If the car 4 further descends in this state, the guide portion 33 also descends, so that the braking shoe 22 bites between the inclined portion of the guide portion 33 and the guide rail 3 to prevent the car 4 from descending. .

On the contrary, when the braking device is operated while the car 4 is rising, the braking shoe 22 is pulled up and bites between the inclined portion of the guide portion 33 and the guide rail 3 as in the above, and the car 4 Try to stop the rise of. However, when the car 4 rises, the guide portion 33 also rises, and the braking shoe 22 tends to come off between the guide portion 33 and the guide rail 3, so that the wedge action of the braking shoe 22 does not work sufficiently. In this case, as the car 4 rises, the brake shoe 22 also rises via the lever 31, but since the wedge action of the brake shoe 22 does not work sufficiently, the car 4 does not stop suddenly but stops gently. , Or will continue to rise. When the car 4 continues to rise, as in the case of FIG. 2, when the car 4 turns from upward to downward due to gravity, the downward movement of the car 4 is blocked.

As described above, also in the present embodiment, like the embodiment of FIG. 2, it is possible to prevent the sudden stop during the ascent of the car without using a special control device or a battery. Although the electromagnet 14 is used in each of the above-described embodiments, the invention is not limited to this, and another method such as a hydraulic method may be used.

[0021]

[Effect of device]

 As described above, according to the present invention, it is possible to prevent an abrupt stop while the car is rising without using a special control device or battery, so that passengers in the car float up and the car is placed on the ceiling of the car. It is possible to avoid a collision.

[Brief description of drawings]

FIG. 1 is a diagram showing a braking device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view showing another embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a diagram showing a conventional low press elevator.

FIG. 6 is a diagram showing a conventional braking device.

[Explanation of symbols]

 1 Sidewall of hoistway 2 Primary coil of linear motor 3 Guide rail 4 Car 5 Secondary conductor of linear motor 8 Braking device 9,22 Braking shoe 10,31 Lever 20,33 Guide part

Claims (1)

[Scope of utility model registration request] 1. A low press elevator driven by a linear motor or the like, which raises and lowers a car along a guide rail without using a main rope or a counterweight, braking by holding the car by holding the guide rail. The device is installed in the car, and the braking device includes a guide part having an inclined surface whose upper part is inclined in the guide rail direction, and a braking shoe arranged on the guide rail side of the guide part. Is clamped between the guide portion and the guide rail to prevent the car from descending. A low-press elevator braking device.