Elevator rail lifting system and lifting method

Abstract

To provide an elevator rail lifting system capable of reducing damage to workers even when a part of a guide rail lifting mechanism falls.SOLUTION: An elevator rail lifting system 1 for lifting a rail 3b installed in an elevator hoistway 2, comprises a gondola 12 that moves up and down along a gondola wire 24 arranged vertically in the hoistway 2, and a lifting machine 11 that moves up and down along a lifting wire 23 arranged vertically in the hoistway 2, the lifting machine 11 having a suspension structure that suspends the rail 3b.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an elevator rail lifting system and method for lifting a guide rail to a desired height within a hoistway during elevator installation. [Background technology]

[0002] A known prior art for installing guide rails in elevator hoistways is the elevator installation method of Patent Document 1. For example, the document discloses a rail installation method in which guide rails are sequentially connected from the top step downwards in lines 19, upper right column, page 3 to line 1, upper right column, page 4, and in Figures 2 and 3. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-088684 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, a sling rope is hung from a lifting beam erected at the top of the hoistway, and a pulley (pulley) attached to the lower end of the sling rope is used to lift the guide rail (see Figure 2 of the document, etc.). Therefore, if the pulley (pulley) falls from a high place due to a defect or breakage of the sling rope and collides with a worker in the hoistway, there is a possibility that the worker may be seriously injured.

[0005] Therefore, an object of the present invention is to provide an elevator rail lifting system and lifting method that can reduce injury to workers even if part of the guide rail lifting mechanism falls. [Means for solving the problem]

[0006] In order to solve the above problems, the elevator rail lifting system of the present invention is a lifting system for lifting a rail installed in an elevator hoistway, and includes a gondola that rises and falls along a gondola wire arranged vertically in the hoistway, and a lifting machine that rises and falls along a lifting wire arranged vertically in the hoistway, the lifting machine having a suspension structure that suspends the rail. Effect of the Invention

[0007] According to the elevator rail lifting system and lifting method of the present invention, even if part of the guide rail lifting mechanism falls, damage to workers can be reduced. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a plan view of the hoistway after the elevator is installed. [Diagram 2] 1 shows an example of use of the lifting system according to one embodiment. [Diagram 3] FIG. 2 is a functional block diagram of a lifting system according to an embodiment. [Figure 4] FIG. 2 is a plan view of the hoistway before the elevator is installed. [Diagram 5] 1 shows an example of a suspension structure for a rail before installation in a lifting system according to an embodiment. [Figure 6] 13 is another example of a suspension structure for a rail before installation in the lifting system of an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of the elevator rail lifting system of the present invention will be described below with reference to the drawings. In the following, the up, down, front, back, left and right directions are defined as shown in each drawing.

[0010] <Hoistway after elevator installation> Fig. 1 is a plan view of a hoistway 2 after an elevator has been installed, looking down from above. Since the elevator illustrated here is a bucket elevator, a pair of car rails 31 that guide the ascent and descent of a car 4 and a pair of counterweight rails 32 that guide the ascent and descent of a counterweight 5 are installed inside the hoistway 2. Hereinafter, these rails will be collectively referred to as guide rails 3. In the figure, 21 denotes a landing door, and 41 denotes a car door.

[0011] A guide shoe (not shown) that fits with the car rail 31 is provided on the side of the car 4, and this slides on the car rail 31 to suppress vibrations in the front-rear and left-right directions when the car is raised and lowered. Similarly, a guide shoe (not shown) that fits with the counterweight rail 32 is provided on the side of the counterweight 5, and this slides on the counterweight rail 32 to suppress vibrations in the front-rear and left-right directions when the counterweight is raised and lowered.

[0012] <How to install guide rail 3> Next, a method for installing the guide rail 3 will be described with reference to FIGS.

[0013] In order to guide the ascent and descent of the car 4 and counterweight 5 over the entire height of the hoistway 2, each guide rail 3 is installed vertically from the upper end to the lower end of the hoistway 2. Because the material for the guide rails 3 is a rail with a length of about 3 to 5 m, it is rare that one guide rail 3 can be constructed with only one rail, and usually, a guide rail 3 of a length approximately equal to the entire height of the hoistway 2 is constructed by sequentially adding a new rail (hereinafter referred to as the "rail before installation 3b") to an existing rail 3a already installed on the inner wall of the hoistway 2.

[0014] 2 shows an example of the use of the lifting system 1 of this embodiment when a pre-installation rail 3b is added to the upper end of an existing rail 3a. This lifting system 1 is a system equipped with a lifting machine 11 and a gondola 12, and uses structures such as a beam 22, a lifting wire 23, and a gondola wire 24 installed in a hoistway 2 to lift and lower the lifting machine 11 and the gondola 12 individually.

[0015] 3 is a functional block diagram of the lifting system 1. As shown in the figure, the lifting machine 11 includes a drive unit 11a and a control unit 11b that controls the drive unit 11a. The gondola 12 includes a drive unit 12a, a control unit 12b that controls the drive unit 12a, and an operation unit 12c that receives operations from the worker W.

[0016] The control unit 11b of the lifting machine 11 and the control unit 12b of the gondola 12 are connected to each other so that they can communicate with each other via wired or wireless communication, so that the lifting machine 11 can be raised and lowered by commands from a worker W via the operation unit 12c and the control unit 12b, or the lifting and lowering of the lifting machine 11 can be controlled by commands automatically generated by the control unit 12b of the gondola 12.

[0017] When both control units are connected by wire, a communication cable of about 5 m is used, so the control unit 12b of the gondola 12 regulates the lifting and lowering control of both the lifting machine 11 and the gondola 12 so that the distance between them is kept such that the communication cable is not damaged. Each component will be described in detail below.

[0018] <<Lifting machine 11>> As shown in FIG. 2, the lifting machine 11 is a machine that lifts itself to a desired height along a lifting wire 23 arranged vertically in the elevator shaft 2 by driving the driving unit 11a, and is, for example, an electric endless winder. In this lifting machine 11, the wire insertion port and the wire discharge port of the driving unit 11a are arranged in a straight line in the vertical direction. In addition, the lifting machine 11 of this embodiment is provided with a hanging mechanism (details will be described later) for hanging the pre-installation rail 3b, so that when the pre-installation rail 3b is hung from the lifting machine 11, the lifting machine 11 and the pre-installation rail 3b rise and fall in synchronization. Note that when installing an elevator, it is necessary to install a lifting machine 11 for each guide rail 3, but for simplification, only one lifting machine 11 and one lifting wire 23 are shown in FIG. 2.

[0019] <<Gondola 12>> 2, the gondola 12 is a machine that, by driving the drive unit 12a, lifts a work platform, which serves as a work space for a worker W, to a desired height along a gondola wire 24 that is arranged vertically in the elevator shaft 2. In this gondola 12, the wire insertion port and wire discharge port of the drive unit 12a are arranged vertically in a straight line.

[0020] <<Other Structures>> As structures necessary for the lifting and lowering of the lifting machine 11, an appropriate number of beams 22 (for example, two) are horizontally installed at the upper end of the hoistway 2. Similarly, as structures necessary for the lifting and lowering of the gondola 12, an appropriate number of beams 22 (for example, one) are horizontally installed at the upper end of the hoistway 2. The lifting wires 23 and the gondola wires 24 are connected to the beams 22 via platform wires, hoisting devices, slinging wires, beam clamps, etc.

[0021] Fig. 4 is a plan view of the hoistway 2 before the elevator is installed, looking down from above, and illustrates the installation positions of the lifting wires 23 and the gondola wires 24. As is clear from a comparison of Fig. 1 and Fig. 4, each lifting wire 23 is disposed near the position where the car rail 31 and the counterweight rail 32 should be disposed, and at a position that does not impede the ascent and descent of the gondola 12. In addition, a pair of gondola wires 24 are disposed in the center of the hoistway 2.

[0022] In addition, although Figure 4 shows all four lifting wires 23 necessary to install the four guide rails 3 (31, 32), it is not necessary to install all of them at the same time. For example, the lifting wire 23 for the car rail 31 may be stretched, used to install the car rail 31 over its entire height, the lifting wire 23 for the car rail 31 may be removed, the lifting wire 23 for the counterweight rail 32 may be stretched, used to install the counterweight rail 32 over its entire height, and the lifting wire 23 for the counterweight rail 32 may be removed. In this manner, the installation work of the guide rails 3 may be carried out while rearranging the lifting wires 23.

[0023] <<An example of the suspension structure of the rail 3b before installation>> 5 shows an example of a structure for suspending the pre-installation rail 3b from a lifting machine 11. As shown in the figure, a high-rigidity suspension bracket 11c is fixed to the main body of the lifting machine 11 with bolts or the like. The upper end of the pre-installation rail 3b is suspended from the suspension bracket 11c via a suspension tool 11d such as a shackle attached to the lower part of the suspension bracket 11c, a sling wire 11e suspended from the suspension tool 11d, and a suspension tool 11f such as a shackle attached to the lower end of the sling wire 11e.

[0024] When the pre-installed rail 3b is raised to the height of the gondola 12 in this manner, the lifting machine 11 with the pre-installed rail 3b suspended therefrom is in a position lower than the gondola 12 for most of the time. Therefore, even if the sling wire that suspends the lifting wire 23 from the upper beam 22 or the sling wire 11e that suspends the pre-installed rail 3b from the lifting machine 11 breaks, the worker W on the gondola 12 will not be injured by the lifting machine 11 or the pre-installed rail 3b that fall as a result of the wire breakage.

[0025] 2, when the guide rail 3 is installed, it is also planned that the lifting machine 11 will rise to a position higher than the worker W on the gondola 12. However, even in such a case, unlike Patent Document 1 in which the pulley is located at the top of the elevator, the distance between the lifting machine 11 and the pre-installation rail 3b and the worker W is extremely short, so that even if the lifting machine 11 or the pre-installation rail 3b falls due to the breakage of the sling wire or the like, the collision energy at the time of contact with the worker W is relatively small, and the possibility of the worker W suffering fatal injury is low.

[0026] <<Another example of the suspension structure of rail 3b before installation>> When the pre-installation rail 3b for the top rail is suspended using the method shown in Figure 5 and lifted to the top end of the elevator shaft 2, it may not be possible to lift the pre-installation rail 3b to the height of the top rail due to interference between the lifting machine 11 and the ceiling of the elevator shaft 2.

[0027] 6, in another example of a structure in which the pre-installation rail 3b is suspended from a lifting machine 11, the lower part of the pre-installation rail 3b is suspended from the lifting machine 11 so that the upper end of the pre-installation rail 3b can be lifted up to near the ceiling of the elevator shaft 2. Specifically, this suspension mechanism is configured as follows.

[0028] That is, both sides of the lower part of the pre-installation rail 3b are sandwiched between a pair of rail suspenders 11g, and each of the rail suspenders 11g is fixed to the pre-installation rail 3b with a rail clip 11h. The fixed rail suspenders 11g are then connected to a hoisting device 11f (not shown) at the lower end of the sling wire 11e. Furthermore, the upper part of the pre-installation rail 3b is slidably connected to the lifting wire 23 using a rail fall prevention device 11i. The rail fall prevention device 11i is a shackle or the like through which the lifting wire 23 passes at one end (the left end in FIG. 6) and connected to the upper part of the pre-installation rail 3b at the other end (the right end in FIG. 6).

[0029] Therefore, when lifting the top rail, if the pre-installation rail 3b is attached to the lifting machine 11 as shown in Figure 6, the upper end of the pre-installation rail 3b will be higher than the lifting machine 11, so even if the upper end of the pre-installation rail 3b is lifted close to the ceiling of the elevator shaft 2, there will be no interference between the lifting machine 11 and the ceiling of the elevator shaft 2.

[0030] <Effects of this embodiment> According to the elevator rail lifting system of this embodiment described above, even if the lifting machine, which is part of the guide rail lifting mechanism, falls due to the breakage of the sling wire, etc., the safety of the workers on the gondola can be ensured, and even if the fallen lifting machine comes into contact with a worker on the gondola, damage to the worker can be reduced. [Explanation of symbols]

[0031] 1 Lifting System 11 Lifting machine 11a Drive unit 11b Control section 11c Hanging bracket 11d, 11f Hanging equipment 11e Sling Wire 11g Rail suspension 11h Rail Clip 11i Rail fall prevention 12. Gondola 12a Drive unit 12b Control section 12c Control unit 2. Lift 21 Platform door 22 Beam 23 Lifting wire 24 Gondola Wire 3 Guide rail 3a Existing rail 3b Rail before installation 31 Basket Rail 32 Counterweight rail 4 Basket 41 Cage Door 5 Counterweight

Claims

1. A lifting system for lifting a rail installed in an elevator hoistway, comprising: A gondola that ascends and descends along a gondola wire that is arranged vertically in the elevator; A lifting machine that moves up and down along a lifting wire arranged vertically in the elevator shaft, An elevator rail lifting system, wherein the lifting machine has a suspension structure for suspending the rail.

2. 2. The lifting system of claim 1, An elevator rail lifting system, characterized in that the lifting machine suspends the upper part of the rail via a hoist and a sling wire.

3. 2. The lifting system of claim 1, The lifting machine suspends the lower part of the rail via a hoist, a sling wire, and a rail hoist, An elevator rail lifting system, characterized in that the upper part of the rail and the lifting wire are connected with a rail collapse prevention device.

4. 2. The lifting system of claim 1, A gondola control unit that controls the elevation and lowering of the gondola and a lifting machine control unit that controls the elevation and lowering of the lifting machine are connected via a communication cable, The gondola control unit controls the raising and lowering of the gondola and the lifting machine so that the gondola and the lifting machine do not move apart by more than a predetermined distance, according to an elevator rail lifting system.

5. 2. The lifting system of claim 1, The elevator is a bucket elevator, 13. An elevator rail lifting system, wherein the rail is a car rail for guiding the ascent and descent of a car, or a counterweight rail for guiding the ascent and descent of a counterweight.

6. A method for lifting a rail installed in an elevator hoistway, comprising the steps of: suspending the rail from a lifting machine that moves up and down along a lifting wire disposed vertically within the hoistway; Raising the lifting machine and the rail to a position adjacent to a gondola ascending or descending along a gondola wire disposed vertically within a hoistway; A method for lifting an elevator rail, comprising:

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