JP2000255932A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator reducing the size of a hoistway even though a load on a car is increased. SOLUTION: A rail 2 is extended along a hoist path of a balance weight 1, and a pair of rollers 3a holding the rail 2 from both sides are provided for rotation on the balance weight 1. A rotary drive mean 3 rotating at least one of the rollers 3a is provided on the balance weight 1. A hoistway side inversion sheave 6 to which a rope 5 is hooked is provided at the top of a hoistway 21. The balance weight 1 is hoisted along the rail 2 by rotating at least one of the rollers 3a with the rotary drive mean 3 to roll the rollers 3a on the rail 2, thereby hoisting a car 7 in the hoistway 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator using a rope for driving a car, and more particularly to an elevator capable of saving space in a hoistway by eliminating a machine room.

[0002]

2. Description of the Related Art Conventionally, many proposals have been made for elevator systems that do not require a machine room. For example, a method has been proposed in which a motor is installed on a counterweight and the car is raised and lowered by the power of the motor. Specifically, JP-A-6-255959 and JP-A-7-137 have been proposed.
No. 963, JP-A-7-137964, JP-A-9-12
Japanese Patent No. 4259 discloses an elevator of this type.

FIG. 6 shows a schematic structure of a conventional elevator in which a motor is installed on a counterweight. In this elevator, a drive motor 22 is provided inside a counterweight 1.
The rope 5 is hung on a traction sheave 20 that rotates coaxially with the drive motor 22.
One end of the rope 5 is fixed to the upper part of the hoistway 21 by the fixing member 11.
The other end is fixed to the upper end of the car 7 via a pair of return wheels 6 above the hoistway 21 after being hung.

[0004] A junction 14 under the elevator cable below the car 7 and a junction 16 of the elevator cable building.
Control panel 17 by elevator cable 15 passing through
And the counterweight 1 are connected. Reference numeral 13 in FIG. 6 denotes a brake device for a guide rail (not shown) of the counterweight 1, and reference numeral 12 denotes a brake device for the drive motor 22.

In the conventional elevator shown in FIG. 6, the drive motor 22 rotates the traction sheave 20 to raise and lower the counterweight 1 by itself, thereby raising and lowering the car 7.

As another method, there has been proposed a method in which a motor is installed in a car and a roller that sandwiches a guide rail of the car is rotated by the motor to run by itself.

[0007]

However, in a conventional system in which a motor is installed inside a counterweight and a car is driven via a rope by a traction sheave, the size of the hoistway is reduced (the machine room is not required). Although this is an efficient method to achieve this, the increase in the weight of the car,
It is necessary to arrange a large-capacity motor capable of driving a car and a traction sheave for hanging a sufficient number of ropes to suspend the car in a limited space in the counterweight. As the number of ropes increases, the thickness of the traction sheave must be increased, resulting in an increase in the overall thickness of the counterweight.

Further, in a conventional system in which a roller installed between a guide rail is rotated by a motor installed in a car to thereby make the car self-propelled, a required torque which increases with an increase in the weight of the car is increased. If it can be generated by the motor and the frictional force enough to support the car can be secured between the roller and the guide rail, it is possible to eliminate the counterweight, but to generate a large torque It is necessary to increase the size of the motor, and as the size of the motor increases, the weight increases by that amount, resulting in a vicious cycle.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems, and has as its object to provide an elevator capable of reducing the size of a hoistway even when the load on a car increases.

[0010]

SUMMARY OF THE INVENTION The present invention is directed to an elevator of the type utilizing a rope for driving a car, the balance being suspended by the rope, and extending along the elevating track of the balance. A rail provided, a pair of rollers rotatably provided on the counterweight, sandwiching the rail from both sides, and a roller provided on the counterweight to rotate at least one of the pair of rollers And a hoistway-side turning sheave provided at the upper part of the hoistway and around which the rope is hung, and the rotary drive means rotates at least one of the rollers to roll on the rail. The counterweight is moved up and down along the rail by moving the car, whereby the car is moved up and down in the hoistway.

It is preferable that the rail is extended corresponding to a vertical center line of the counterweight and functions as a guide rail for guiding the lifting / lowering operation of the counterweight.

Preferably, both ends of the rope are fixed to the car via a pair of hoistway-side turning sheaves provided above the hoistway.

[0013] Further, a pair of car-side turning sheaves are provided on the car, and the ropes sent from the pair of hoistway-side turning sheaves are passed over each of the pair of car-side turning sheaves. Is desirably fixed to the upper part of the hoistway.

It is preferable that the apparatus further comprises a lifting sheave rotatably provided on the counterweight, and the rope is stretched over the lifting sheave.

[0015] The pair of lifting sheaves having a common rotation axis with the rotation axis of the pair of rollers and rotatable independently of the pair of rollers is provided on the counterweight. The pair of rollers are movable together with the pair of lifting sheaves in a direction pressed against the rail, and the rollers are pressed against the rails by a force transmitted from the rope to the lifting sheave, whereby the pair of rollers is moved. It is desirable to increase the holding force of the rail by the roller.

According to the present invention, there is provided an elevator of a type utilizing a rope for driving a car, a counterweight suspended by the rope, a guide rail for guiding an ascent / descent operation of the car, and A rail extending along the elevating track, a pair of rollers provided rotatably on the car, and a pair of rollers sandwiching the rail from both sides, and a pair of rollers provided on the car, and at least one of the pair of rollers A rotary drive unit for rotating the roller, and a hoistway-side turning sheave provided on an upper portion of the hoistway and around which the rope is hung, wherein the at least one roller is rotated by the rotary drive unit, and The car is adapted to move up and down in a hoistway by rolling on rails.

Further, a pair of lifting sheaves having a common rotation axis with the rotation axes of the pair of rollers and capable of rotating independently of the pair of rollers are provided in the car, and the rope is provided with: The pair of elevating sheaves are hung, the pair of rollers is movable with the pair of elevating sheaves in a direction pressed against the rail,
It is preferable that the roller is pressed against the rail by a force transmitted from the rope to the lifting sheave, thereby increasing a clamping force of the pair of rollers on the rail.

Preferably, the rotation driving means comprises a motor provided on the counterweight or the car, and the at least one roller is provided on a rotating portion of the motor.

Preferably, the rail is formed of a member having an I-shaped cross section, and the pair of rollers desirably sandwich both side concave portions of the member having an I-shaped cross section.

It is desirable to provide a turning sheave braking means for braking the rotation of the hoistway-side turning sheave.

Further, it is desirable to provide a roller braking means for braking the rotation of the roller.

Further, it is preferable that a lifting / lowering braking means for braking the lifting / lowering of the counterweight or the car by utilizing a frictional force with the rail is provided on the counterweight or the car.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment Hereinafter, an elevator according to a first embodiment of the present invention will be described with reference to FIGS. Note that the same components as those of the conventional elevator shown in FIG.

FIG. 1 is an overall configuration diagram schematically showing an elevator according to the present embodiment, FIG. 2 is a perspective view showing a counterweight portion, and FIG. 3 is a diagram showing the inside of the counterweight from directly above. FIG.

As shown in FIG. 1, the elevator according to the present embodiment is a type in which the rope 5 is used for driving the car 7. The car 7 is guided up and down by a guide rail (not shown). Both ends of the rope 5 are fixed to a car 7 via a pair of hoistway-side turning sheaves (return wheel) 6 provided at an upper portion of the hoistway 21.

The counterweight 1 is suspended by an intermediate portion of the rope 5, and the rail 2 extends from the floor surface 9 of the hoistway 21 to the ceiling surface 8 along the lifting track of the counterweight 1. Has been established. As shown in FIG. 2 and FIG.
Is extended corresponding to the vertical center line of the counterweight 1. The counterweight 1 has a recess 1a formed along the vertical centerline thereof, and the rail 2 is received in the recess 1a.

The rail 2 functions as a guide rail for guiding the lifting / lowering operation of the counterweight 1. By making the rail 2 function as a guide rail of the counterweight 1 in this manner, it is not necessary to separately provide guide rails on both sides of the counterweight 1, and therefore, guide shoes and the like are provided on both left and right sides of the counterweight 1. There is no need, and the width of the weight body is almost the entire width of the counterweight 1, so that the space of the hoistway 21 can be saved and the cost can be significantly reduced.

As shown in FIGS. 1 to 3, a rotating drive means comprising a pair of motors 3 is provided inside the counterweight 1 and a roller 3a is provided on the outer periphery or shaft of the rotating portion of the motor 3.
And a pair of rollers 3a sandwich the rail 2 from both sides thereof. The roller 3a can be composed of a tire made of an elastic material such as rubber.

Further, a pair of elevating sheaves 4 are provided at fixed portions of the pair of motors 3, and each elevating sheave 4 has a common rotation axis with the rotation axis of each roller 3a. It can rotate freely independently of.

The rope 5 is stretched over a pair of elevating sheaves 4, and these elevating sheaves 4 are not provided with a rotational driving force, and hardly rotate when the car 7 is driven. Accordingly, these lifting sheaves 4 are different from the traction sheave 20 in the conventional elevator shown in FIG.
The counterweight 1 can be made thinner, and thus the entire counterweight 1 can be made thinner.

The pair of rollers 3 is movable together with the pair of lifting sheaves 4 in the direction pressed against the rail 2. Therefore, the lifting sheave 4
The pair of rollers 3 are pressed against the rails 2 by the force transmitted to the rails 2, whereby the clamping force of the pair of rollers 3 on the rails 2 increases. This pinching force increases with an increase in the load weight of the car 7.

The rail 2 can be made of a member having a T-shaped cross section as shown in FIG. 2, but it can also be constituted by a member having an I-shaped cross section as shown in FIG. When a member having an I-shaped cross section is used, the roller 3a can be prevented from coming off from the rail 2 by sandwiching the concave portions on both sides of the rail 2 formed of the member having the I-shaped cross section between a pair of rollers 3a.

In the present embodiment, two motors 3 are provided to directly apply the rotational driving force to both the pair of rollers 3a. However, as a modified example, the number of motors 3 to be installed is one. Alternatively, one of the rollers 3a may be provided on the rotating portion of the motor 3, and the other roller 3a may not be directly applied with the rotational driving force. When two motors 3 are provided, the load on each motor 3 can be reduced by half, and when one motor 3 is used, the space saving inside the counterweight 1 and the counterweight 1 can be reduced. Can be reduced in size.

In order to synchronize the two motors 3, a belt may be provided between the shafts of the two motors 3.

In the elevator of the present embodiment having the above-described structure, the motor 3 is driven to rotate the roller 3a, and the roller 3a is rolled along the rail 2 by the frictional force between the roller 3a and the rail 2. By moving the counterweight 1, the counterweight 1 runs by itself along the rail 2 and moves up and down, whereby the car 7 moves up and down in the hoistway 21.

The car 7 is braked by the hoistway-side turning sheave 6
This can be achieved by providing a turning sheave braking means (not shown) for braking the rotation of. The turning sheave braking means may be configured, for example, to provide a disk or a cylindrical portion coaxially with the hoistway-side turning sheave 6 and to perform braking by the force of a spring. By providing the turning sheave control means in this manner, the limited space above the hoistway 21 can be effectively used without complicating the mechanism inside the counterweight 1. Further, since the turning sheave braking means is fixed at a fixed position, its adjustment, maintenance work, manual opening mechanism and the like become easy.

Further, a roller braking means (not shown) for braking the rotation of the roller 3a may be provided in the motor 3 to brake the car 7. The roller braking means has a configuration in which, for example, a braking member (shoe) is directly pressed from both sides to a rotating portion of the motor 3, or a disk is provided coaxially and integrally with the rotating portion of the motor 3, and the disk is sandwiched by the braking member. can do. By providing the roller braking means in this manner, the configuration of the upper portion of the hoistway 21 is not complicated, and the rotation of the motor 3 can be reliably braked.

Further, the counterweight 1 is made using a frictional force generated by pressing a braking member (shoe) against the rail 2.
The counterweight 1 may be provided with a lifting / lowering braking means (not shown) for braking the vertical movement of the counterweight. In this way, hoistway 2
The structure of the top portion of the motor 1 and the structure of the motor 3 are not complicated, and the operation of the counterweight 1 can be reliably braked.

As described above, according to the elevator according to the present embodiment, the motor 3 which is the drive source for driving the car 7 is mounted on the counterweight 1, so that the motor is installed in the hoistway 21. It is not necessary to provide any beams, support members, etc., and space saving inside the hoistway 21 can be realized.

In the present embodiment, the counterweight 1
The rail 2 is sandwiched between a pair of rollers 3a provided in the vehicle, and the roller 3a is rotationally driven by the motor 3 to drive the counterweight 1 and the car 7 up and down. Therefore, even when the motor weight increases in accordance with the increase in the loading weight of the car 7, the motor weight is not the car but the counterweight 1
, And the restriction on the motor weight can be eased as compared with the case where the motor is installed in the car 7.

Second Embodiment Next, an elevator according to a second embodiment of the present invention will be described with reference to FIG. Note that the present embodiment is a partial modification of the configuration of the above-described first embodiment. Hereinafter, portions different from the first embodiment will be described.

As shown in FIG. 4, in the elevator according to the present embodiment, a pair of car-side turning sheaves 10 are provided below the car 7. Then, the rope 5 sent from the pair of hoistway-side turning sheaves 6 is wrapped around each of the pair of car-side turning sheaves 10, and the rope 5
Are fixed to the ceiling surface 8 of the hoistway 21.

According to the present embodiment having the above-described structure, the torque of the motor 3 required to raise and lower the car 7 is reduced by half, and the capacity of the motor 3 can be reduced.

Third Embodiment Next, an elevator according to a third embodiment of the present invention will be described with reference to FIG. The same components as those in the above-described first embodiment are denoted by the same reference numerals and will be described.

FIG. 5 is an overall structural view schematically showing an elevator according to the present embodiment. As shown in FIG. 5, in this embodiment, the motor 3 and the lifting sheave 4 are not the counterweight 1 but the car. 7.

Further, apart from a guide rail (not shown) for guiding the raising and lowering operation of the car 7, the rail 2 is extended along the raising and lowering track of the car 7.
Are sandwiched from both sides by a pair of rollers 3a.

One end of the rope 5 is fixed to the counterweight 1 by a fixing mechanism (not shown), and the rope 5 is connected to a pair of hoistway-side turning sheaves (turning wheel) provided above the hoistway 21. 6) and is passed over a pair of lifting sheaves 4 of a car 7 via a car 6. The counterweight 1 is moved up and down along guide rails (not shown) provided on both right and left sides thereof.

The configuration of the motor 3 and the lifting sheave 4 in the present embodiment is the same as the configuration shown in FIGS. 2 and 3, and a roller 3a is provided on the outer periphery or shaft of the rotating part of the motor 3, Rollers 3a sandwich the rail 2 from both sides thereof. Further, a pair of elevating sheaves 4 are provided at fixed portions of the pair of motors 3, and each elevating sheave 4 has a common rotation axis with the rotation axis of each roller 3a,
It can rotate freely independently of each roller 3a.

The rope 5 is stretched over a pair of elevating sheaves 4, and these elevating sheaves 4 do not receive a rotational driving force, and hardly rotate when the car 7 is driven. Therefore, unlike the traction sheave, these lifting sheaves 4 can simplify the groove shape and reduce the thickness.

Further, the pair of rollers 3 can move together with the pair of lifting sheaves 4 in the direction pressed against the rail 2. Therefore, the lifting sheave 4
The pair of rollers 3 are pressed against the rails 2 by the force transmitted to the rails 2, whereby the clamping force of the pair of rollers 3 on the rails 2 increases. This pinching force increases with an increase in the load weight of the car 7.

The rail 2 can be made of a member having a T-shaped cross section as shown in FIG. 2, but it can also be constituted by a member having an I-shaped cross section as shown in FIG. When a member having an I-shaped cross section is used, the roller 3a can be prevented from coming off from the rail 2 by sandwiching the concave portions on both sides of the rail 2 formed of the member having the I-shaped cross section between a pair of rollers 3a.

In this embodiment, two motors 3 are provided to directly apply the rotational driving force to both of the pair of rollers 3a. However, as a modified example, one motor 3 is installed. Alternatively, one of the rollers 3a may be provided on the rotating portion of the motor 3, and the other roller 3a may not be directly applied with the rotational driving force. When two motors 3 are provided, the load on each motor 3 can be reduced by half, and when one motor 3 is provided, the protruding portion from the car 7 can be reduced.

In order to synchronize the two motors 3, a belt may be provided between the shafts of the two motors 3.

In the elevator of the present embodiment having the above configuration, the motor 3 is driven to rotate the roller 3a, and the roller 3a is rolled along the rail 2 by the frictional force between the roller 3a and the rail 2. By moving the car 7, the car 7 runs along the rail 2 and moves up and down.

The car 7 is braked by the hoistway-side turning sheave 6.
This can be achieved by providing a turning sheave braking means (not shown) for braking the rotation of. The turning sheave braking means may be configured, for example, to provide a disk or a cylindrical portion coaxially with the hoistway-side turning sheave 6 and to perform braking by the force of a spring. By providing the turning sheave control means in this way, the limited space above the hoistway 21 can be effectively used. Further, since the turning sheave braking means is fixed at a fixed position, its adjustment, maintenance work, manual opening mechanism and the like become easy.

Further, a roller braking means (not shown) for braking the rotation of the roller 3a may be provided in the motor 3 to brake the car 7. The roller braking means has, for example, a configuration in which a braking member (shoe) is directly pressed from both sides against a rotating portion of the motor 3 or a configuration in which a disk is provided coaxially and integrally with the rotating portion of the motor 3 and the disk is sandwiched by the braking member. can do. By providing the roller braking means in this manner, the configuration of the upper portion of the hoistway 21 is not complicated, and the rotation of the motor 3 can be reliably braked.

The counterweight 1 is made using the frictional force generated by pressing the braking member (shoe) against the rail 2.
The car 7 may be provided with an elevating braking means (not shown) for braking the elevating movement. In this way, hoistway 2
The structure of the top of the vehicle 1 and the structure of the motor 3 are not complicated, and the operation of the car 7 can be reliably braked.

As described above, according to the elevator according to the present embodiment, the motor 3 which is a drive source for driving the car 7 is mounted on the car 7, so that the motor There is no need to provide beams, support members, and the like, and space saving inside the hoistway 21 can be realized.

Further, since the motor 3 and the roller 3a are installed below the car 7, the operation for adjusting the motor 3 and the roller 3a can be performed from the car 7.

[0060]

As described above, according to the elevator according to the present invention, since the rotary driving means, which is the driving source for driving the car, is mounted on the counterweight, the driving source can be installed in the hoistway. There is no need to provide beams, support members, and the like, and space saving inside the hoistway can be realized. Also, the rail is pinched by a pair of rollers provided on the counterweight,
Since the balance weight and the car are driven up and down by rotating the rollers by the rotary driving means, the driving source weight accompanying the increase in the loaded weight of the car is compared with the case where the driving source is installed in the car. Can be relaxed.

According to the elevator according to the present invention,
Since the car is equipped with rotary drive means, which is a drive source for driving the car, there is no need to provide beams or support members for installing the drive source in the hoistway, thus saving space inside the hoistway. Can be realized. In addition, since the rotary drive means and the rollers are installed in the car, the adjustment work thereof can be performed from the car.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram schematically showing an elevator according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a counterweight portion of the elevator according to the first embodiment of the present invention.

FIG. 3 is a view of the inside of the counterweight of the elevator according to the first embodiment of the present invention as viewed from directly above.

FIG. 4 is an overall configuration diagram schematically showing an elevator according to a second embodiment of the present invention.

FIG. 5 is an overall configuration diagram schematically showing an elevator according to a third embodiment of the present invention.

FIG. 6 is an overall configuration diagram schematically showing a conventional elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Counterweight 2 Rail 3 Motor 3a Roller 4 Elevating sheave 5 Rope 6 Hoistway side turning sheave 7 Riding car 10 Riding car side turning sheave 21 Hoistway

Claims (13)

[Claims] 1. An elevator using a rope for driving a car, comprising: a balancing weight suspended by the rope; a rail extending along a lifting orbit of the balancing weight; A pair of rollers rotatably provided on a counterweight and sandwiching the rail from both sides; a rotation driving means provided on the counterweight and rotating at least one of the pair of rollers; A hoistway-side turning sheave provided at an upper part of a road, and on which the rope is hung, wherein the counterweight is rotated by rotating the at least one roller by the rotation driving means on the rail. The elevator is adapted to move up and down along the rail, whereby the car moves up and down in the hoistway. 2. The apparatus according to claim 1, wherein said rail extends along a vertical center line of said counterweight, and also functions as a guide rail for guiding the lifting / lowering operation of said counterweight. The elevator as described. 3. The rope of claim 1, wherein both ends of the rope are fixed to the car via a pair of hoistway-side turning sheaves provided at an upper portion of the hoistway. Item 3. The elevator according to item 2. 4. A pair of car-side turning sheaves are provided on the car, and the ropes sent from the pair of hoistway-side turning sheaves are respectively wound around the pair of car-side turning sheaves. The elevator according to claim 1, wherein the elevator is fixed to an upper portion of the hoistway. 5. The lifting sheave provided rotatably on the counterweight, wherein the rope is stretched over the lifting sheave. Elevator. 6. A pair of said lifting sheaves having a common rotation axis with a rotation axis of said pair of rollers and being rotatable independently of said pair of rollers is provided on said counterweight. The pair of rollers are movable together with the pair of lifting sheaves in a direction pressed against the rail, and the rollers are pressed against the rails by a force transmitted from the rope to the lifting sheave, whereby the pair of rollers is moved. 6. The elevator according to claim 5, wherein a clamping force of said rail by said roller is increased. 7. An elevator of the type utilizing a rope for driving a car, a counterweight suspended by the rope, a guide rail for guiding the raising and lowering operation of the car, and an elevating track of the car. And a pair of rollers that are rotatably provided on the car, and that sandwich the rail from both sides, and that are provided on the car, and at least one roller of the pair of rollers. Rotating drive means for rotating, and a hoistway-side turning sheave provided at the upper part of the hoistway and around which the rope is hung, wherein the rotary drive means rotates at least one of the rollers to rotate on the rail. The elevator is characterized in that the car is moved up and down in a hoistway by rolling. 8. A pair of lifting sheaves having a common rotation axis with the rotation axes of the pair of rollers and capable of rotating independently of the pair of rollers are provided on the car, and the rope comprises: The pair of elevating sheaves are stretched, and the pair of rollers are movable together with the pair of elevating sheaves in a direction pressed against the rail, and by a force transmitted to the elevating sheave from the rope. The elevator according to claim 7, wherein the roller is pressed against the rail, whereby a force for holding the rail by the pair of rollers is increased. 9. The motor according to claim 1, wherein said rotation driving means comprises a motor provided on said counterweight or said car, and said at least one roller is provided on a rotating portion of said motor. The elevator according to claim 8. 10. The rail according to claim 1, wherein said rail is constituted by a member having an I-shaped cross section, and said pair of rollers sandwiches both side concave portions of said member having an I-shaped cross section. The elevator according to one of the preceding claims. 11. The elevator according to claim 1, further comprising a turning sheave braking means for braking the rotation of the hoistway-side turning sheave. 12. An elevator according to claim 1, further comprising a roller braking means for braking the rotation of said roller. 13. A lifting / lowering braking means for braking the lifting / lowering of the counterweight or the car using a frictional force with the rail is provided on the counterweight or the car. The elevator according to any one of claims 1 to 12.