JPH11322221A - Main rope hanging for 2:1 roping elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a main rope hanging method for a 2:1 roping elevator which can reduce cost and allow high efficient replacement of a main rope. SOLUTION: This elevator is provided with a rope brake 13 engaged with a main rope 2 tensed between a wire drum 1 and a hoist sheave 5, and while the frictional force of the rope brake 13 is being adjusted, the main rope 2 is drawn from the wire drum 1 to be hung downward in a hoistway 3. The frictional force generated between the hoist sheave 5, the outer-periphery surface of a deflector wheel 6, and the main rope 2 can cancel part of the dead load of a U-shaped part of the main rope 2, or reduce a load imposed on the rope brake 13, thus it is possible to minimize the strength of the rope brake 13 for downsizing. The other end of the main rope 2 can be retained by relatively small effort, thus it is also possible to fine-adjust the amount for drawing the main rope 2 from the wire drum 1, and determine the appropriate length of the main rope 2 easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main rope hanging method for a 2: 1 roping elevator.

[0002]

2. Description of the Related Art FIG. 4 is a view for explaining a conventional example of a main rope hanging work method of a 2: 1 roping elevator, and FIG. 5 is a view showing a rope brake used in a conventional main rope hanging work method.

In the elevator shown in FIG. 4, a wire drum 1 on which a main rope 2 is wound so as to be able to be pulled out has a top floor landing 12.
Machine room 4 provided at the top of the hoistway 3
In addition, a hoisting sheave 5 around which the main rope 2 is wound and a deflecting wheel 6 are installed. On the floor 4a of the machine room 4, a pair of rope stoppers 7a and 7b for fixing both ends of the main rope 2 respectively, and a rope brake 8 located near the deflector 6 and applying a predetermined frictional force to the main rope 2 And is installed. The car 9 has a car pulley 9a around which the main rope 2 is wound, and the counterweight 10 also has a counter pulley 10a around which the main rope 2 is wound.

[0004] As a conventional main rope hanging work method, first, the car 9 is lifted by a hoist (not shown), and the car 9 is temporarily held on the floor 4 a of the machine room 4 by the temporary holder 11. Next, the wire drum 1 is installed on the top floor landing 12, and one end of the main rope 2 is pulled out from the wire drum 1 and wound around the car pulley 9a, the hoisting sheave 5 and the deflector wheel 6, and then the main rope 2 Is fixed to the weight-side rope stopper 7b.

Next, the main rope 2 is engaged with the rope brake 8 located near the deflector wheel 6 to adjust the frictional force of the rope brake 8, thereby preventing the main rope 2 from drooping at an excessive speed. While gradually the main rope 2
The U-shaped part 2a of the main rope 2 is wound around a counter pulley 10a of a counterweight 10 installed at the bottom of the hoistway 3 as shown in FIG. Is cut at a predetermined position near the wire drum 1, and the car-side end of the cut main rope 2 is fixed to the car-side rope stopper 7a to complete the main rope hooking method. .

The prior art relating to this type of main rope hanging work method is disclosed in, for example, Japanese Patent Application Laid-Open No. 52-7104.
No. 3 is cited.

[0007]

In the above-mentioned conventional main rope hanging method, the U-shaped portion 2 of the main rope 2 is used.
As the "a" hangs down, the weight of the U-shaped portion 2a increases, and the load applied to the rope brake 8 increases. Therefore, it is necessary to increase the size of the rope brake 8 so that the rope brake 8 has strength. However, there is a problem that the cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances in the prior art, and has as its object to reduce the cost and to perform the main rope replacement operation efficiently with the main rope of a 2: 1 roping elevator. It is to provide a hanging work method.

[0009]

In order to achieve the above object, the present invention provides a hoist in which a wire drum on which a main rope is wound so as to be able to be pulled out is installed on a top floor landing and installed in a machine room at the top of a hoistway. After hanging the main rope pulled out from the wire drum on the machine sheave and the deflector, one end of the main rope is fixed to a counterweight weight side rope stop installed on the floor of the machine room, and the In a main rope hooking method for a 2: 1 roping elevator in which a main rope is pulled out and hung downward in a U-shape toward the lower part of the hoistway, the main rope hung work method stretched between the wire drum and the hoist sheave. A rope brake that engages with the main rope and applies a predetermined frictional force to the main rope is provided. Are a configuration to droop downward of the shaft is pulled out of the main rope.

In the present invention constructed as described above, after the main rope pulled out from the wire drum is wrapped around the hoist sheave and the deflecting wheel, the main rope stretched between the wire drum and the hoist sheave. Since the rope brake is engaged with the rope, as the main rope deflects and hangs down in a U-shape from the vehicle in the hoistway, the weight of the U-shaped portion of the main rope increases. A part of the self-weight is offset by the frictional force generated between the outer peripheral surface of the main rope and the main rope. As a result, the load on the rope brake can be reduced, so that the strength of the rope brake can be relatively small, and the cost can be reduced by downsizing the rope brake.

Further, even when the main rope is suspended in a U-shape in the hoistway, the other end of the main rope can be held with a relatively small force. Adjustment is possible, that is, an appropriate length of the main rope can be easily determined, so that the main rope hanging operation can be performed efficiently.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a main rope hanging work method for a 2: 1 roping elevator according to the present invention. FIG. 1 is a diagram showing a state in which a main rope is replaced in a 2: 1 roping elevator using a main rope hanging work method according to an embodiment of the present invention, and FIG. 2 is used in the main rope hanging work method of the present embodiment. FIG. 3 is a front view of the rope brake and its peripheral portion, and FIG. 3 is a perspective view of the rope brake and its peripheral portion. In FIGS. 1 to 3, the same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals.

A hoisting machine 50 shown in FIG. 2 has a rotating shaft 51 to which the above-described hoisting sheave 5 is attached, and a rotating shaft 51
, A bearing 53 for rotatably supporting one end of the rotary shaft 51, a machine base 54 on which the drive 52 and the bearing 53 are mounted, and a floor 4a.
A machine beam 55 mounted on the top and extending in a direction orthogonal to the longitudinal direction of the machine base 54 and on which the machine base 54 is mounted.

In the main rope hanging work method of the present embodiment, as shown in FIG. 1, the main rope hanging work method is stretched between the wire drum 1 and the hoisting sheave 5 as shown in FIG. The provision of the rope brake 13 that engages with the main rope 2 is provided, and other configurations are basically the same.

As shown in FIGS. 2 and 3, the rope brake 13 is disposed below the hoisting sheave 5 and is attached to a lower surface of a pair of machine beams 55.
And a plurality of, for example, four rope holding portions 132 attached to the side surface of the rope receiving portion 131.

The rope receiving portion 131 has a click 131a.
Is fixed to the pair of machine beams 55. Each rope holding portion 132 has an engaging groove 1 for engaging with the main rope 2.
32b and a pair of through holes 132c into which the mounting bolts 132a are inserted are provided.

According to the main rope hanging work method of this embodiment, first, as in the conventional case, the car 9 is lifted by a hoist (not shown), and the car 9 is held by the temporary holding tool 11 in the machine room. 4 on the floor 4a,
Next, the wire drum 1 is installed on the top floor landing 12, and one end of the main rope 2 is pulled out from the wire drum 1 and wound around the car pulley 9a, the hoisting sheave 5 and the deflector wheel 6, and then the main rope 2 Is fixed to the weight-side rope stopper 7b.

Next, after attaching the rope receiving portion 131 to the lower surfaces of the pair of machine beams 55 and fixing the rope receiving portion 131 with the click 131a, the rope holding portion 132 is engaged with the main rope 2 while the engaging groove 132b is engaged with the rope holding portion 132. The mounting bolts 132a are inserted into the through holes 132c of the portion 132, and the mounting bolts 132a are screwed into the through holes 131b of the rope receiving portion 131, and the main rope 2 is clamped by the rope receiving portion 131 and the rope pressing portion 132. .

Next, by tightening or loosening the mounting bolts 132a, the frictional force of the rope brake 8 is adjusted, and while the main rope 2 is prevented from hanging at an excessive speed, the main rope 2 is gradually drawn. As shown in FIG. 1, the U-shaped portion 2a of the main rope 2 is suspended in a U-shape.
Around the counter pulley 10a of the counterweight 10 installed at the bottom of the main rope 2, and finally cut the other end of the main rope 2 at a predetermined position near the wire drum 1, and cut the car-side end of the cut main rope 2 The main rope hanging work method is finished by fixing to the car side rope stopper 7a.

In the embodiment constructed as above, one end of the main rope 2 is pulled out and wound around the car pulley 9a, the hoisting sheave 5, and the deflector wheel 6, and then the car pulley 9a and the hoisting sheave 5 Since the rope brake 13 is engaged with the main rope 2 stretched between the main ropes 2, the U-shaped portion of the main rope 2 is Although the own weight of 2a increases, a part of the own weight of the U-shaped portion 2a can be offset by the frictional force generated between the outer peripheral surface of the hoisting sheave 5 and the deflecting wheel 6 and the main rope 2, and the rope brake 8 is applied. The load can be reduced.

In this embodiment, the rope brake 1
3 comprises only a rope receiving portion 131 attached to the lower surfaces of the pair of machine beams 55 and four rope holding portions 132 attached to the side surfaces of the rope receiving portion 131, and has a simple and small configuration.

In this embodiment, even when the main rope 2 is suspended in a U-shape in the hoistway 3, the main rope 2
Can be held with a relatively small force, the amount of pulling out the main rope 2 from the wire drum 1 can be finely adjusted, and an appropriate length of the main rope 2 can be easily determined. It is possible to carry out the hanging operation of 2 efficiently.

[0023]

As described above, according to the present invention, when the main rope is suspended from the vehicle in a U-shape in the hoistway, the outer rope of the hoisting sheave and the deflector wheel and the main rope are connected to each other. The load on the rope brake can be reduced by canceling a part of the main rope's own weight with the frictional force generated between the ropes, so that the rope brake can be relatively low in strength and the amount of main rope pulled out from the wire drum can be reduced. Fine adjustment is possible and the appropriate length of the main rope can be easily determined. Therefore, there is an effect that the size of the rope brake can be reduced and the cost can be reduced, and there is an effect that the main rope hanging operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a main rope is replaced in a 2: 1 roping elevator using a main rope hanging work method according to an embodiment of the present invention.

FIG. 2 is a front view of a rope brake used in the main rope hanging work method of the present embodiment and a peripheral portion thereof.

FIG. 3 is a perspective view of a rope brake and a peripheral portion thereof.

FIG. 4 is a diagram illustrating a conventional example of a main rope hanging work method of a 2: 1 roping elevator.

FIG. 5 is a view showing a rope brake used in a conventional main rope hanging work method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire drum 2 Main rope 3 Hoistway 4 Machine room 4a Floor 5 Hoisting sheave 6 Deflector car 7a, 7b Rope stop 9 Riding car 10 Counterweight 11 Temporary holding tool 12 Top floor landing 13 Rope brake 131 Rope receiving part 131a Click 132 Rope holding part 132a Mounting bolt 132b Engagement groove 132c Through hole

Claims (1)

[Claims] 1. A wire drum on which a main rope is wound so as to be able to be pulled out is installed at a landing on the top floor, and a main drum pulled out from the wire drum is put on a hoisting sheave and a deflector mounted in a machine room at the top of a hoistway. After wrapping the rope, one end of the main rope is fixed to a counterweight-side rope stop installed on the floor of the machine room, and the main rope is pulled out from the wire drum and U-shaped downwardly of the hoistway. In the method of hanging a main rope of a 2: 1 roping elevator, the main rope is engaged with the main rope stretched between the wire drum and the hoisting sheave, and a predetermined friction is applied to the main rope. A rope brake for applying force is provided, and while adjusting the frictional force of the rope brake, the main rope is pulled out from the wire drum and hangs down the hoistway. 1 the main rope threading operation method of roping elevator: 2, characterized in that the the cause.