JPH06156950A - Elevator - Google Patents

Abstract

PURPOSE:To suppress the generation of noise of an elevator, to facilitate work to extend an elevator shaft, and to shorten a rope by a method wherein the intermediate parts of ropes are run in an S-shape around a pair of sheaves one at a time and a tension is exerted on the ropes. CONSTITUTION:A pair of sheaves, i.e., a first drive sheave 36 and a first driven sheave 44 and a second driven sheave 38 and a second driven sheave 46, which are reversed to each other through gears 48, 50, and 52 by rotation of a driven motor 34, are arranged to a drive mechanism 18 positioned above a car 14. A stretch force is exerted on first and second ropes 16 and 16a, suspended from the top support beams 22 of guide rails 12 and 12, by means of balance weights 26 and 26. The first ropes 16 and 16a are run in an S-shape around the sheaves 36 and 44 and 38 and 46, making a pair, one at a time. This constitution causes elimination of a balance weight elevated in parallel to the car 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator, and more particularly to an elevator in which a cage is vertically guided along a hoistway which is successively added as work progresses.

[0002]

2. Description of the Related Art An elevator cage is usually hung from a hoistway via a pulley hung on a folded part of a rope extending downward from the upper part of the hoistway to support a folded rope above the machine room in the hoistway. Raises and lowers according to the amount of winch rope. Then, the rope extending through the winch extends downward again, suspends the balance weight via the pulley, and extends upward again to be fixed. In addition, the construction elevator is attached to the building frame of the building to be elevated, and is used to lift workers and relatively lightweight and small materials. The structure is such that the lifting height of the cage can be raised one by one. Such an elevator for construction work is generally driven up and down by a motor. The drive mechanism is generally known as a rack gear type or a winch type.

In the former rack gear type, a rack gear temporarily installed on the side of the building body is engaged with a pinion gear provided on the cage side, and the cage is moved up and down by driving the pinion gear by a motor. . On the other hand, the latter winch type is disclosed, for example, in Japanese Utility Model Publication No. 57-25880 and Japanese Utility Model Publication No. 57-25881 (B66B 9/1).
As disclosed in 8), a rope hoisting device (winch)
The cage is hung from the rope that is fed out from the rope, and by driving the winch with a motor, the rope is wound and unwound to raise and lower the cage.

By the way, the winch type construction elevator disclosed in the above publication stores a rope hoisting device as a drive mechanism, a rope unwinding device and a winding device for adjusting the length of the rope in one machine room. However, this machine room is arranged independently of the cage at the upper end of the hoistway that guides the cage up and down. In addition, the rope is hung down in a folded state between the rope hoisting device and the rope unwinding device, and the balance weight is movably hung on the bent portion at the lower end of the rope so that the balance weight balances with the mass of the cage. It has become.

[0005]

However, since the balance weight for balancing the weight of the cage is provided so as to allow the cage to pass through, the hoistway must be enlarged. Further, in the case of a construction elevator, in the conventional construction elevator, in the rack gear type, noise and vibration occur in the meshing portion between the rack gear and the pinion gear, which causes noise pollution around the construction site. There is. On the other hand, in the winch type disclosed in the above-mentioned publication, the rope is hung in a folded state and the balance weight is hung at the bent portion at the lower end thereof. Will be significantly longer. In addition, this winch type uses a rope hoist,
Since the machine room provided with the rope feeding device and the winding device is provided at the upper end of the hoistway independently of the cage, when the hoistway is replenished and raised, the Japanese Patent Publication No. 59-35
821, Japanese Patent Publication No. 59-35822 (B66)
As disclosed in B 7/00), it is necessary to lift and move the weighted machine room each time, and there is a problem that the work requires a great deal of labor.

In view of such conventional problems, the present invention reduces the space of the hoistway, suppresses noise generation when used for construction, and provides a drive mechanism on the cage side. In addition to facilitating the work of adding hoistways,
It is an object of the present invention to provide an elevator in which the folded portion of the rope is eliminated and the rope is shortened.

[0007]

In order to achieve the above object, the present invention hangs one or a plurality of ropes from the upper end to the lower end of a hoistway, and at the same time, by a drive motor and this drive motor. The cage is provided with a drive mechanism having one or more pairs of sheaves that rotate in opposite directions to each other, and one intermediate portion of the rope is wound around each pair of sheaves in an S shape, and the rope is appropriately attached to the rope. It is composed by adding a great tension.

[0008]

In the elevator of the present invention having the above-described structure, the intermediate portion of the rope suspended from the upper end of the hoistway is wound into S-shapes on the sheaves which form a pair of drive mechanisms and rotate in opposite directions. Since the rope is turned and an appropriate tension is applied to the rope, the cage can be hung on the rope due to the frictional force generated in the S-shaped winding portion between the rope and the sheave forming a pair. Then, by rotating the sheave forward and backward by the drive motor, the rope wound in the S shape can be pulled up or down to raise and lower the cage. Therefore, in the elevator of the present invention, since the drive mechanism is provided in the cage, the balance weight that moves up and down in parallel with the cage becomes unnecessary, and the space of the hoistway can be reduced. Further, when used for construction, even when the hoistway is extended and extended upward, it is sufficient to simply lengthen the rope, and the hoistway joining work is greatly simplified. Further, the rope may be arranged linearly with the upper end and the lower end of the hoistway appropriately tensioned, and the length of the rope can be shortened to the minimum necessary.

[0009]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 6 show an embodiment of a construction elevator according to the present invention, FIG. 1 is a front view showing the whole construction elevator, FIG. 2 is a side view showing the whole construction elevator, and FIG. 3 is a construction work. FIG. 4 is a front view of a balance weight provided at a lower end portion of a rope of a work elevator, FIG. 4 is a side view of the balance weight, FIG. 5 is a front view of a drive mechanism provided in the construction elevator, and FIG. 6 is a side view of the drive mechanism.

That is, as shown in FIGS. 1 and 2, the construction elevator 10 of the present embodiment is provided with a pair of left and right guide rails 12 and 12 as a hoistway vertically attached to a building frame (not shown). The cage 14 is supported by the guide rails 12, 12 via rollers 13, 13, ... The cage 14 has two first and second ropes 16, 16
The cage 14 is suspended from the rope 16 via the drive mechanism 18 attached to the upper side of the cage 14,
It is adapted to be moved up and down along 16a. A lower support 2 is provided between the lower ends of the pair of guide rails 12, 12.
0 is attached and the top support beam 22 is provided between the upper ends.
Is installed. And the two ropes 16, 16
a is a combination of the tail members 24, 2 in the center of the top support beam 22.
Suspended via 4. The lower ends of the two ropes 16 and 16a suspended from the top support beam 22 are located at the lower ends of the guide rails 12 and 12,
The balance weight 2 is passed through a winding drum 28 described later.
6 and 26 are attached to each rope 1
An appropriate tension force is applied to 6, 16a.

At the upper end of the balance weight 26,
A winding drum 28 is provided as shown in FIGS. 3 and 4, and the lower ends of the ropes 16 and 16a are wound around the winding drum 28 by a predetermined length. Considering the length of the ropes 16 and 16a wound around the winding drum 28, the length of the cage 14 that can be raised to the uppermost floor in a state where the guide rails 12 that are successively added are extended to the maximum. Will be decided. The ropes 16 and 16a
Is wound on the take-up drum 28 before the take-up drum 28 is wound.
Is guided by a guide sheave 30 that is movable in the direction of the central axis of the ropes 16, 16a.
Is delivered smoothly.

On the other hand, as shown in FIGS. 5 and 6, the drive mechanism 18 includes a drive motor 34 arranged in the center of the frame 32, and a rotary shaft 34a arranged in the horizontal direction of the drive motor 34. The first drive sheave 36 and the second drive sheave 38 are integrally rotatably attached thereto. A first driven shaft 40 and a second driven shaft 42 are rotatably provided on the frame 32 in the up-down direction of the rotating shaft 34a and parallel to the rotating shaft 34a. 1
The driven sheave 44 is attached to the second driven shaft 42 by the second driven sheave 4
6 are attached so that they can rotate together. The first drive sheave 36 and the first driven sheave 44, and the second drive sheave 38 and the second driven sheave 46 form a pair, and their outer circumferences are arranged in the vertical direction.

Further, the rotating shaft 34a and the first and second
Gears 48, 50, 52 are attached to the driven shafts 40, 42, and the gears 48, 50 and the gears 48, 52 are meshed with each other, whereby the first drive sheave 36, the first driven sheave 44, and the second drive sheave 38. And the second driven sheave 46
Are designed so that each pair rotates in opposite directions. Then, the drive mechanism 18 is attached to the upper center portion of the cage 14 via the bracket 54 attached to the lower end portion of the frame 32.

As shown by the broken line in FIG. 5, the first rope 16 circulates the first drive sheave 36 from the lower side to the upper side for more than a half turn, and from the lower side to the upper side of the first driven sheave 44. After being wound more than a half round and wound in an S shape, it is hung vertically and connected to the balance weight 26. On the other hand, the second rope 16a circulates the second driven sheave 46 from the lower side to the upper side for a half or more as shown by the alternate long and short dash line in FIG.
After wrapping around 8 from the lower side to the upper side for more than half a round, and similarly wound in an S shape, it is suspended in the vertical direction and connected to the balance weight 26.

In the construction elevator 10 of the present embodiment having the above-described structure, the drive mechanism 18 provided on the upper side of the cage 14 has the gear 4 driven by the rotation of the drive motor 34.
Two pairs of sheaves that are rotated in opposite directions via 8, 50, 52, that is, the first drive sheave 36 and the first driven sheave 4
4 and the second drive sheave 38 and the second driven sheave 46, and the first and second ropes 16 and 16a hung from the top support beam 22 of the guide rails 12 and 12.
In addition, an appropriate tension force is applied by the balance weights 26, 26, and each of the first and second ropes 16, 16a is formed into an S-shape on the sheaves 36 and 44 and 38 and 46 forming a pair, respectively. It is wound. Therefore, the cage 14 includes ropes 16 and 16a and sheaves 36 and 44.
The cage 14 is hung while being held by the ropes 16 and 16a without slipping off due to the frictional force of the wound portions with 38 and 46. By rotating the drive motor 34 forward and backward in this state, the two pairs of sheaves 36 and 44 and 38 and 46 pull the ropes 16 and 16a upward or downward, so that the cage 14 moves up or down. be able to.

On the other hand, in order to increase the ascending distance of the cage 14 as the construction progresses, the top support beam 22 at the upper ends of the guide rails 12 and 12 is removed and another upper end of the guide rails 12 and 12 is provided. Add the guide rails 12 respectively. Then, the top support beam 22 is attached between the upper ends of the guide rails 12, 12 that have been added. At this time, as the guide rails 12 and 12 extend, the rope 1
6, 16a need to be extended, but in the present embodiment, from the winding drum 28 provided on the balance weights 26, 26,
The ropes 16 and 16a are adapted to be extended as much as they are extended.

Therefore, the construction elevator 10 of this embodiment
Since the drive mechanism 18 is provided in the cage 14, the ropes 16 and 16a are simply wound without moving the drive mechanism 18 even when the guide rails 12 and 12 are extended and extended upward. It is sufficient to extend the drum 28 from the drum 28, and the work of adding the guide rails 12, 12 is greatly simplified. In addition, the ropes 16 and 16a
Can be arranged linearly by tensioning between the upper and lower ends of the guide rail 12, and therefore the ropes 16, 16
The length of a can be minimized by shortening it.

In this embodiment, the ropes 16 and 16 are
Although the case where two a are provided is disclosed, the number of ropes may be one or three or more without being limited to this, and in this case, the sheaves of the drive mechanism 18 that are paired with each other to rotate in reverse are the ropes. It may be provided according to the number.

In this embodiment, the construction elevator has been described, but it can also be used for a normal elevator,
In that case, passing and passing cannot be done, but it is possible to install multiple cages above and below the hoistway.
You can effectively use the hoistway in a limited space.

[0020]

As described above, in the elevator according to the present invention, the intermediate portion of the rope suspended from the upper end portion of the hoistway serves as a sheave which makes a pair of drive mechanisms and rotates in opposite directions. Since the cage is hung on the rope by winding each in an S-shape and applying an appropriate tension to the rope, the balance weight that goes up and down in parallel with the cage is unnecessary, and the space of the hoistway is reduced. be able to. In addition, when it is used for construction, if the hoistway is added and it extends upward, it is sufficient to simply lengthen the rope.
It is possible to greatly simplify the work of connecting hoistways.
Further, the rope may be arranged linearly by appropriately tensioning the upper end and the lower end of the hoistway, and various excellent effects that the length of the rope can be shortened to the necessary minimum. Play. Further, it is possible to provide a plurality of cages above and below the hoistway, and the hoistway in a limited space can be effectively used.

[Brief description of drawings]

FIG. 1 is an overall front view showing an embodiment of a construction elevator according to the present invention.

FIG. 2 is an overall side view showing an embodiment of a construction elevator according to the present invention.

FIG. 3 is a front view of a balance weight used in an embodiment of the construction elevator according to the present invention.

FIG. 4 is a side view of a balance weight used in an embodiment of the construction elevator according to the present invention.

FIG. 5 is a front view of a drive mechanism provided in an embodiment of the construction elevator according to the present invention.

FIG. 6 is a side view of a drive mechanism provided in an embodiment of the construction elevator according to the present invention.

[Explanation of symbols]

10 Elevator for Construction 12 Guide Rail (Hoistway) 14 Cage 16 First Rope 16a Second Rope 18 Drive Mechanism 26 Balance Weight 34 Drive Motor 36 First Drive Sheave 38 Second Drive Sheave 44 First Driven Sheave 46 Second Driven Sheave

Claims (1)

[Claims] 1. A drive provided with a drive motor and one or a plurality of pairs of sheaves that rotate in opposite directions by the drive motor while suspending one or a plurality of ropes from an upper end to a lower end of a hoistway. An elevator characterized in that a mechanism is provided in a cage, one intermediate portion of the rope is wound around each pair of sheaves in an S shape, and an appropriate tension is applied to the rope.