Main rope replacement device and main rope replacement method

Abstract

To reduce the labor of workers in the replacement work of a main rope.SOLUTION: A main rope replacement device 1 includes a winding device 10 fixed to a structural member of a machine room 121, and a replacement jig 30 arranged along a pair of counterweight guide rails. One end of a plurality of main ropes 102 on a car 101 side is connected to the winding device 10, and the other end of the plurality of main ropes 102 on a balance weight 103 side is connected to the replacement jig 30. A worker can wind up the plurality of main ropes 102 in the machine room 121 by applying a rotational force to the handle of the winding device 10. Therefore, it is possible to reduce the labor of the worker in the replacement work of the main rope.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a main rope replacement device and a main rope replacement method used for replacing the main rope of an elevator using a one-to-one roping system. [Background technology]

[0002] 2. Description of the Related Art Conventionally, it is known that in order to replace a main rope of an elevator, a worker in a machine room winds up an existing main rope in the machine room (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-203750 Summary of the Invention [Problem to be solved by the invention]

[0004] When replacing the main rope of an elevator using a conventional one-to-one roping system, the existing main rope must be wound up in the machine room by the worker, who must pull the main rope up into the machine room. This poses a problem as the replacement of the main rope requires a great deal of effort on the part of the worker.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to reduce the labor required by workers when replacing a main rope. [Means for solving the problem]

[0006] The main rope replacement device of the present disclosure includes a winding device having a winding drum and a drum support that rotatably supports the winding drum. The winding drum has a body and a main rope attachment portion provided on the outer peripheral surface of the body, and the main rope of an elevator can be connected to the main rope attachment portion. Effect of the Invention

[0007] According to the main rope replacement device and main rope replacement method disclosed herein, it is possible to reduce the labor required by workers when replacing the main rope. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a side view showing an elevator to which a main rope exchange device according to a first embodiment is applied. [Diagram 2] FIG. 2 is a front view showing a connection portion between the car and counterweight and the main rope in FIG. [Diagram 3] FIG. 2 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 1 is a side view showing a state in which a main rope exchange device according to a first embodiment is installed in an elevator. [Diagram 5] FIG. 5 is a perspective view showing the winding device of FIG. [Figure 6] FIG. 6 is a front view showing the winding device of FIG. 5. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 5 is a perspective view showing the replacement jig in FIG. [Figure 9] FIG. 9 is a perspective view of the mounting rod of FIG. 8. [Figure 10] 4 is a flowchart of a main rope replacement method according to the first embodiment. [Figure 11] 7 is a cross-sectional view taken along line VII-VII in FIG. 6 of the winding drum 11 in the second embodiment. [Figure 12] FIG. 11 is a side view showing a state in which a main rope exchange device according to a third embodiment is installed in an elevator.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Embodiment 1 1 is a side view showing an elevator 100 to which a main rope exchange device according to embodiment 1 is applied. The elevator 100 has a car 101 in which passengers can ride, a counterweight 103, a plurality of main ropes 102 connecting the car 101 and the counterweight 103, a pair of car guide rails (not shown) that guide the movement of the car 101 along the vertical direction, and a pair of counterweight guide rails (not shown) that guide the movement of the counterweight 103 along the vertical direction.

[0010] The car 101 and the counterweight 103 can move vertically inside the hoistway 110. In FIG.

[0011] In the hoistway 110, a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed along the vertical direction.

[0012] A machine room 121 is provided above the elevator shaft 110. On the floor of the machine room 121, H-shaped steel beams 120 serving as structural members are arranged.

[0013] The elevator 100 further includes a hoisting machine 104, a deflection sheave 105, and a control panel (not shown). The hoisting machine 104 includes a drive sheave for the hoisting machine 104. The hoisting machine 104, the deflection sheave 105, and the control panel are arranged in the machine room 121.

[0014] A plurality of main ropes 102 are wound around a driving sheave and a deflector sheave 105 of the hoisting machine 104. In the hoistway 110, a car 101 and a counterweight 103 are suspended by the plurality of main ropes 102.

[0015] One end of each main rope 102 is connected to the upper part of the car 101. The other end of each main rope 102 is connected to the upper part of the counterweight 103. This allows the car 101 and the counterweight 103 to be suspended by each main rope 102 in a one-to-one roping system.

[0016] The connection between the counterweight 103 and each of the main ropes 102 will be described with reference to Fig. 2. Fig. 2 is a front view showing the connection portion between the counterweight 103 and one of the main ropes 102 in Fig. 1.

[0017] The diagram on the left side of Fig. 2 shows a state in which the other end of the main rope 102 is connected to the fixed side connecting member 106. The diagram on the right side of Fig. 2 shows a state in which the connecting device 102c is detached from the other end of the main rope 102 and the fixed side connecting member 106.

[0018] A main rope end member 102a is fixed to the other end of the main rope 102. The tip of the main rope end member 102a is formed to be bifurcated. A main rope connection hole 102b is formed in each of the bifurcated tips of the main rope end member 102a.

[0019] A connector 102c is attached to each of the main rope connection holes 102b. In the first embodiment, the connector 102c is a bolt and a nut.

[0020] A plurality of fixed-side connecting members 106 are provided on the upper portion of the counterweight 103. Each fixed-side connecting member 106 is a rod-shaped member. One end of each fixed-side connecting member 106 is a fixed-side connecting portion 106a. A fixed-side connecting portion connecting hole 106b is formed in the fixed-side connecting portion 106a.

[0021] The other end of each fixed connecting member 106 is attached to a counterweight 103 .

[0022] As shown in the left diagram of Figure 2, when the fixed side connecting part 106a and the main rope end member 102a are connected, the fixed side connecting part 106a is inserted between the bifurcated tips of the main rope end member 102a.

[0023] A bolt, which is a connector 102c, is inserted into the fixed-side connector connection hole 106b and the main rope connection hole 102b. A nut, which is a connector 102c, is then tightened onto the bolt. This connects the fixed-side connector 106 and the other end of the main rope 102.

[0024] To release the connection between the fixed side connecting member 106 and the main rope 102, the bolt and nut that constitute the connecting tool 102c are removed from the main rope end member 102a. This releases the connection between the main rope end member 102a and the fixed side connecting member 106, as shown in the diagram on the right side of FIG.

[0025] The connection between the car 101 and the main ropes 102 is similar to the connection between the counterweight 103 and the main ropes 102. That is, a plurality of fixed side connecting members 106 are provided on the upper part of the car 101. One end of each of the plurality of main ropes 102 is connected to each of the plurality of fixed side connecting members 106.

[0026] Returning to Fig. 1, the explanation will be continued. The hoisting machine 104 rotates a driving sheave of the hoisting machine 104 under the control of a control panel. The car 101 and the counterweight 103 move up and down in the hoistway 110 by the rotation of the driving sheave of the hoisting machine 104. When the car 101 and the counterweight 103 move up and down, the car 101 is guided by a pair of car guide rails, and the counterweight 103 is guided by a pair of counterweight guide rails.

[0027] Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1. The counterweight 103 is disposed between a pair of counterweight guide rails 115 disposed in the hoistway 110.

[0028] The counterweight 103 has a counterweight main body 103a and four guide shoes 103b. Guide shoes 103b are disposed at the upper and lower ends of the counterweight main body 103a at positions corresponding to a pair of counterweight guide rails 115. A guide groove 103c is formed on the side surface of each guide shoe 103b facing the counterweight guide rails 115.

[0029] A protruding strip 115a is formed on the surface of each counterweight guide rail 115 facing the guide shoe 103b. When the counterweight 103 is placed between the pair of counterweight guide rails 115, the protruding strip 115a fits into each guide groove 103c.

[0030] The counterweight 103 placed between the pair of counterweight guide rails 115 is movable in the vertical direction with each of the guide grooves 103c aligned along the protruding strips 115a.

[0031] Each of the multiple fixed side connecting members 106 arranged on the upper part of the counterweight 103 is connected to each of the main rope end members 102 a of the multiple main ropes 102 .

[0032] 4 is a side view showing a state in which the main rope exchange device 1 according to the first embodiment is installed in the elevator 100. When each main rope 102 is to be replaced, the main rope exchange device 1 is placed in the elevator 100. The main rope exchange device 1 includes a winding device 10 and an exchange jig 30.

[0033] The winding device 10 is disposed in a machine room 121. The winding device 10 is fixed to an H-shaped steel 120 inside the machine room 121. One end of each of the main ropes 102 detached from the car 101 is connected to the winding device 10.

[0034] The replacement jig 30 is installed by being fitted into a pair of counterweight guide rails 115. The other end of each of the main ropes 102 detached from the counterweight 103 is connected to the replacement jig 30. Each of the multiple main ropes 102 is detached from the driving sheave and the deflector sheave 105 of the hoisting machine 104.

[0035] The car 101 is fixed by a fixing jig (not shown) at a stop position corresponding to the top floor 122. The counterweight 103 is supported by a counterweight support 123 at the bottom of the hoistway 110.

[0036] Fig. 5 is a perspective view showing the winding device 10 of Fig. 4. Fig. 6 is a front view showing the winding device 10 of Fig. 5. The winding device 10 includes a winding drum 11, a drum support 16, a transmission mechanism 19, a handle 20, and a fixed member 21.

[0037] The winding drum 11 has a cylindrical body 12, a pair of body side plates 13 arranged to sandwich the body 12, and a number of hook members 14 as main rope attachment portions provided on the outer circumferential surface of the body 12.

[0038] The winding drum 11 has an axis that is the same as the central axis of the cylindrical body 12. The winding drum 11 is rotatably supported by a drum support 16. The winding drum 11 is detachable from the drum support 16.

[0039] Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 6. The shape of the body 12 is a hollow cylinder. A through hole is formed in the body side plate 13. The second support part 22b is inserted into the through hole of the body side plate 13.

[0040] Of the pair of body side plates 13, a through hole is also formed in a body side plate 13 other than the body side plate 13 shown in Fig. 7. A first support portion 22a is inserted into the through hole of the body side plate 13 other than the body side plate 13 shown in Fig. 7.

[0041] Each of the through holes formed in the pair of body side plates 13 is formed with the axis of the winding drum 11 as its central axis. The first support portion 22a and the second support portion 22b will be described later. Note that the body portion 12 does not have to be hollow.

[0042] Each of the hook members 14 has a shape in which a rod-shaped member is bent into an L-shape. Each of the hook members 14 can be connected to one of the main ropes 102. The connection between each of the hook members 14 and each of the main ropes 102 will be described later.

[0043] 5 and 6, the drum support 16 has a first side plate 17a, a second side plate 17b, a bottom plate 18 disposed between the first side plate 17a and the second side plate 17b, a first support portion 22a attached to the first side plate 17a, and a second support portion 22b attached to the second side plate 17b.

[0044] The first side plate 17a and the second side plate 17b are disposed opposite to each other. The first side plate 17a and the second side plate 17b are connected to each other by a bottom plate 18. The bottom plate 18 is disposed below the winding drum 11 in the vertical direction.

[0045] One end of the first side plate 17a is a first side plate fixing portion 17a1. The first side plate fixing portion 17a1 protrudes vertically downward from the bottom plate 18. A plurality of first screw holes 17a2 are provided in the first side plate fixing portion 17a1. Each of the first screw holes 17a2 penetrates the first side plate 17a.

[0046] One end of the second side plate 17b is a second side plate fixing portion 17b1. The second side plate fixing portion 17b1 protrudes vertically downward from the bottom plate 18. A plurality of second screw holes 17b2 are provided in the second side plate fixing portion 17b1. Each of the second screw holes 17b2 penetrates the second side plate 17b.

[0047] The first support portion 22a is disposed so as to protrude from the surface of the first side plate 17a from the first side plate 17a toward the second side plate 17b. The first support portion 22a is rotatable relative to the first side plate 17a. The second support portion 22b is disposed so as to protrude from the surface of the second side plate 17b from the second side plate 17b toward the first side plate 17a. The second support portion 22b is rotatable relative to the second side plate 17b.

[0048] The winding drum 11 is disposed between the first side plate 17a and the second side plate 17b. The first support portion 22a and the second support portion 22b support the winding drum 11 along the axis of the winding drum 11. The first support portion 22a and the second support portion 22b detachably support the winding drum 11.

[0049] Any suitable configuration may be used for the first support portion 22a and the second support portion 22b to detachably support the winding drum 11. For example, the second support portion 22b may be supported by the second side plate 17b using a spring member (not shown). The second support portion 22b is constantly pushed by the force of the spring member in the direction from the second side plate 17b toward the first side plate 17a.

[0050] When installing the winding drum 11 between the first support portion 22a and the second support portion 22b, the second support portion 22b is moved in a direction from the first side plate 17a toward the second side plate 17b against the force of the spring member to install the winding drum 11. In a state in which the winding drum 11 is installed between the first support portion 22a and the second support portion 22b, the winding drum 11 is supported by being sandwiched between the first support portion 22a and the second support portion 22b.

[0051] When the winding drum 11 is supported between the first support portion 22a and the second support portion 22b, the first support portion 22a, the second support portion 22b, and the winding drum 11 can all rotate around the axis of the winding drum 11 relative to the first side plate 17a and the second side plate 17b.

[0052] In a state in which the winding drum 11 is supported between the first support portion 22a and the second support portion 22b, at least the first support portion 22a and the winding drum 11 rotate together about the axis of the winding drum 11. In other words, in a state in which the winding drum 11 is supported by the drum support body 16, at least the first support portion 22a and the winding drum 11 do not rotate relative to each other.

[0053] An engagement portion (not shown) is formed between the first support portion 22a and the through hole of the winding drum 11 into which the first support portion 22a fits, so that the first support portion 22a and the through hole are hooked to each other. The engagement portion may have a known structure.

[0054] For example, a key (not shown) may be provided on the outer periphery of the first support portion 22a, which is a rod member, as the engagement portion of the first support portion 22a. A key groove (not shown) may be formed on the inner periphery of a through hole of the winding drum 11 as the engagement portion of the winding drum 11, into which the key of the first support portion 22a fits.

[0055] In a state in which the winding drum 11 is supported by the drum support 16, the key of the first support portion 22a fits into the key groove of the winding drum 11. As a result, the first support portion 22a and the winding drum 11 rotate together around the axis of the winding drum 11.

[0056] The first support portion 22a and the second support portion 22b that support the winding drum 11 may have any known structure.

[0057] The transmission mechanism 19 is provided on the first side plate 17a. The transmission mechanism 19 is integrated with the first side plate 17a. The transmission mechanism 19 has a transmission mechanism housing 19a, a switch 19b, a handle receiving portion (not shown), a ratchet mechanism 19c connected to the handle receiving portion, a power boosting mechanism 19d connected to the ratchet mechanism 19c, and an output shaft 19e connected to the power boosting mechanism 19d.

[0058] The handle 20 can be attached to the handle receiving portion. The operator can apply a rotational force to the transmission mechanism 19 by rotating the handle 20 with the handle 20 attached to the handle receiving portion. The transmission mechanism 19 can transmit the rotational force applied to the handle 20 to the winding drum 11.

[0059] The transmission mechanism housing 19a is integrated with the first side plate 17a. A ratchet mechanism 19c, a power boosting mechanism 19d, and an output shaft 19e are disposed inside the transmission mechanism housing 19a. The handle receiving portion is exposed on the surface of the transmission mechanism housing 19a. The handle receiving portion can detachably support the handle 20.

[0060] The switch 19b is a rod-shaped member. The switch 19b is exposed on the surface of the transmission mechanism housing 19a. The position of the switch 19b can be selected from three preset positions by an operator. The switch 19b is connected to the ratchet mechanism 19c.

[0061] The ratchet mechanism 19c can set the state of the transmission mechanism 19, which transmits the rotational force applied to the handle 20 to the winding drum 11, to be switchable among three transmission states, i.e., a first transmission state, a second transmission state, and a third transmission state. The ratchet mechanism 19c can switch between the three transmission states of the transmission mechanism 19 depending on the position of the switch 19b.

[0062] The first transmission state of the transmission mechanism 19 is a state in which only the rotational force generated when the handle 20 rotates in a first direction is transmitted to the winding drum 11. The second transmission state of the transmission mechanism 19 is a state in which only the rotational force generated when the handle 20 rotates in a second direction opposite to the first direction is transmitted to the winding drum 11. The third transmission state of the transmission mechanism 19 is a state in which both the rotational forces generated when the handle 20 rotates in the first direction and the second direction are transmitted to the winding drum 11.

[0063] When the winding drum 11 rotates in the first direction, each main rope 102 connected to the winding device 10 is wound onto the winding drum 11. That is, with the transmission mechanism 19 in the first transmission state, each main rope 102 can be wound onto the winding drum 11.

[0064] Conversely, when the winding drum 11 rotates in the second direction, each main rope 102 connected to the winding device 10 is let out from the winding drum 11. That is, with the transmission mechanism 19 in the second transmission state, each main rope 102 can be let out from the winding drum 11.

[0065] A well-known mechanism can be applied to the ratchet mechanism 19c, for example, a mechanism having a ratchet wheel and a pawl.

[0066] The rotational force of the handle 20 is input to the boost mechanism 19d via the ratchet mechanism 19c. The rotational force input to the boost mechanism 19d is amplified by the boost mechanism 19d and output to the output shaft 19e. A known configuration can be appropriately used for the boost mechanism 19d. The boost mechanism 19d may be composed of a combination of multiple gears, for example.

[0067] The first support portion 22a is connected to the output shaft 19e. When the output shaft 19e rotates, the first support portion 22a rotates. The second support portion 22b can freely rotate with respect to the second side plate 17b. Therefore, when the output shaft 19e rotates, the winding drum 11 supported by the first support portion 22a rotates.

[0068] That is, the handle 20 can apply a rotational force to the winding drum 11. The transmission mechanism 19 can transmit the rotational force from the handle 20 to the winding drum 11. The power-assist mechanism 19d amplifies the rotational force transmitted from the handle 20.

[0069] When the transmission mechanism 19 is in the first transmission state, the output shaft 19e does not rotate in the second direction. Therefore, when the transmission mechanism 19 is in the first transmission state, the winding drum 11 rotates only in the first direction and does not rotate in the second direction.

[0070] When the transmission mechanism 19 is in the second transmission state, the output shaft 19e does not rotate in the first direction. Therefore, when the transmission mechanism 19 is in the second transmission state, the winding drum 11 rotates only in the second direction and does not rotate in the first direction.

[0071] When the transmission mechanism 19 is in the third transmission state, the output shaft 19e rotates in the first direction and the second direction. Therefore, when the transmission mechanism 19 is in the third transmission state, the winding drum 11 rotates in the first direction and the second direction.

[0072] The fixing member 21 can attach the drum support 16 to an H-shaped steel 120, which is a structural member provided in the machine room 121. The fixing member 21 is a plurality of bolts that are screwed into the plurality of first screw holes 17a2 and the plurality of second screw holes 17b2.

[0073] In the first embodiment, four bolts are used as the fixing member 21. However, the number of the first screw holes 17a2, the number of the second screw holes 17b2, and the number of the bolts can be any appropriate number.

[0074] The winding device 10 is disposed vertically above the H-shaped steel 120. The bottom plate 18 is disposed so as to rest on the H-shaped steel 120. The first side plate fixing portion 17a1 and the second side plate fixing portion 17b1 are disposed so as to sandwich the H-shaped steel 120 from both sides.

[0075] The multiple bolts that are fixing members 21 are screwed into the multiple first screw holes 17a2 and the multiple second screw holes 17b2 in a direction toward the H-shaped steel 120. The tip of each of the multiple bolts is pressed against a side surface of the H-shaped steel 120.

[0076] Each of the bolts is screwed into the first screw holes 17a2 and the second screw holes 17b2 until the H-shaped steel 120 is sandwiched between them. In this way, the fixing member 21 fixes the drum support 16 to the H-shaped steel 120. Therefore, the winding device 10 is fixed onto the H-shaped steel 120 by the fixing member 21.

[0077] Fig. 8 is a perspective view showing the replacement jig 30 of Fig. 4. Fig. 9 is a perspective view showing the mounting rod 33 of Fig. 8. The replacement jig 30 has an replacement jig main body 31 and a plurality of mounting rods 33. The replacement jig main body 31 is a rectangular plate.

[0078] A pair of side surfaces facing each other in the longitudinal direction of the replacement jig body 31 are each provided with a guide portion 32. The guide portion 32 is a groove. A plurality of screw holes 34 for rods are provided on the surface of the replacement jig body 31 in the plate thickness direction.

[0079] A rod through hole 33a is formed at one end of the mounting rod 33. A screw 33b is formed at the other end of the mounting rod 33.

[0080] One mounting rod 33 can be screwed into each of the multiple rod screw holes 34. Each of the multiple mounting rods 33 is detachable from the replacement jig body 31. Figure 8 shows a state in which three mounting rods 33 are screwed in.

[0081] Returning to Fig. 4, the explanation will be continued. One end of each of the multiple main ropes 102 removed from the car 101 is connected to the winding device 10 by passing the hook member 14 through the main rope connection hole 102b of each main rope 102. The main rope connection hole 102b of each main rope 102 is hooked onto the hook member of the hook member 14.

[0082] When the replacement jig 30 is disposed between the pair of counterweight guide rails 115, the protruding strips 115a fit into the grooves that are the pair of guide portions 32. This allows the replacement jig 30 to slide along the pair of counterweight guide rails 115.

[0083] The other end of each of the main ropes 102 can be attached to each of the multiple attachment rods 33. Each of the main rope end members 102a of the multiple main ropes 102 detached from the counterweight 103 is connected to each of the multiple attachment rods 33. One end of each attachment rod 33 is inserted between the bifurcated ends of the corresponding main rope end members 102a.

[0084] Each of the multiple bolts, which are the connectors 102c, is inserted into the corresponding main rope connection hole 102b and rod through hole 33a. A nut, which is the connector 102c, is screwed into each of the multiple bolts. This connects the main rope end member 102a and the mounting rod 33.

[0085] In this state, the operator rotates the handle 20 to rotate the winding drum 11. As a result, the multiple main ropes 102 are wound onto the winding device 10.

[0086] Next, a method for replacing the main rope 102 of the elevator 100 using the main rope replacement device 1 in the embodiment 1 will be described. FIG. 10 is a flowchart of the main rope replacement method according to the embodiment 1.

[0087] The replacement work of the main ropes 102 of the elevator 100 refers to the work of replacing the existing main ropes 102 used in the elevator 100 with new main ropes 102.

[0088] <Basket fixing process> In step S1, a car fixing process is performed. The car fixing process is a process of moving the car 101 to the top floor 122 and fixing the car 101 to a stopping position corresponding to the top floor 122. An operator operates the elevator 100 to move the car 101 to the top floor 122. After that, the car 101 is fixed to the stopping position corresponding to the top floor 122 by a fixing jig. A known configuration can be applied to the fixing jig.

[0089] <Counterweight support process> In step S2, a counterweight supporting step is performed. The counterweight supporting step in step S2 is performed after the car fixing step in step S1. The counterweight supporting step is a step of disposing a counterweight support 123 under the counterweight 103.

[0090] The worker places weight support 123 vertically below counterweight 103. In this way, counterweight 103 is supported by weight support 123.

[0091] <Replacement jig placement process> In step S3, an exchange jig arranging step is performed. The exchange jig arranging step of step S3 is performed after the counterweight supporting step in step S2. The exchange jig arranging step is a step of arranging the exchange jig 30 with respect to the pair of counterweight guide rails 115.

[0092] The worker places the replacement jig 30 above the counterweight 103 and between the pair of counterweight guide rails 115. The replacement jig 30 is placed so that the grooves that are the pair of guide portions 32 of the replacement jig 30 and the protrusions 115a provided on each of the pair of counterweight guide rails 115 are fitted together.

[0093] The worker places the replacement jig 30 so that it can slide along the pair of counterweight guide rails 115 .

[0094] In addition, the worker attaches the required number of attachment rods 33 to the replacement jig body 31 based on the number of main ropes 102 to be replaced.

[0095] <Take-up device installation process> As step S4, a winding device installation step is performed. The winding device installation step of step S4 is performed after the replacement jig arrangement step of step S3. The winding device installation step is a step of attaching the winding device 10 to the H-shaped steel 120.

[0096] The worker places the winding device 10 so as to straddle the H-shaped steel 120 in the machine room 121. After that, each of the multiple bolts serving as the fixing members 21 is screwed one by one into the multiple first screw holes 17a2 and the multiple second screw holes 17b2. Note that each of the multiple bolts serving as the fixing members 21 may already be screwed into the multiple first screw holes 17a2 and the multiple second screw holes 17b2.

[0097] When each of the bolts is further screwed in, the tip of each of the bolts pinches the H-shaped steel 120. In this way, the winding device 10 is fixed to the H-shaped steel 120.

[0098] <Counterweight side main rope removal process> In step S5, a process of removing the main rope on the counterweight side is carried out. The process of removing the main rope on the counterweight side in step S5 is carried out after the process of installing the winding device in step S4. The process of removing the main rope on the counterweight side is a process of removing the multiple main ropes 102 connected to the counterweight 103 from the counterweight 103.

[0099] The worker removes the other end of each of the multiple main ropes 102 connected to each fixed connecting member 106 on the upper part of the counterweight 103 from each fixed connecting member 106.

[0100] <Main rope replacement jig connection process> As step S6, a main rope replacement jig connecting step is performed. The main rope replacement jig connecting step of step S6 is performed after the counterweight side main rope detaching step in step S5. The main rope replacement jig connecting step is a step of connecting the other end of each main rope 102 detached from the counterweight 103 to the replacement jig 30.

[0101] The worker connects the main rope end members 102 a at the other ends of the multiple main ropes 102 detached from the counterweight 103 to the respective mounting rods 33 of the replacement jig 30 .

[0102] Thereafter, the worker fixes each main rope 102 to the machine room 121 with a rope chuck (not shown). Fixing each main rope 102 to the machine room 121 with the rope chuck can prevent each main rope 102 from falling during the period from the car-side main rope removal process in step S7 to the main rope take-up device connection process in step S8.

[0103] <Cage side main rope removal process> As step S7, a car-side main rope removal process is carried out. The car-side main rope removal process of step S7 is carried out after the main rope replacement jig connection process of step S6. The car-side main rope removal process is a process of removing the multiple main ropes 102 connected to the car 101 from the car 101.

[0104] The worker removes one end of each of the multiple main ropes 102 connected to each fixed-side connecting member 106 on the upper part of the car 101 from each fixed-side connecting member 106. After that, the worker removes each of the multiple main ropes 102 from the drive sheave and the deflector sheave 105 of the hoisting machine 104.

[0105] <Main rope winding device connection process> As step S8, a main rope take-up device connecting process is performed. The main rope take-up device connecting process of step S8 is performed after the car-side main rope detaching process in step S7. The main rope take-up device connecting process is a process of connecting one end of each main rope 102 detached from the car 101 to the winding device 10.

[0106] The worker attaches the main rope connection holes 102b of the main rope end members 102a at one end of each of the main ropes 102 detached from the fixed side connection members 106 on the upper part of the car 101 to the hook members 14 of the reeling device 10, one by one. In this way, one end of each of the main ropes 102 is attached to the reeling device 10.

[0107] After the multiple main ropes 102 have been attached to the winding device 10, the worker removes the rope chucks that secure each main rope 102 to the machine room 121 and releases the multiple main ropes 102 from being fixed to the machine room 121.

[0108] <Winding process> As step S9, a winding process is performed. The winding process of step S9 is performed after the main rope replacement jig connecting process in step S8. The winding process is a process of winding up the multiple main ropes 102 attached to the winding device 10.

[0109] The worker sets the position of the switch 19b. The worker sets the position of the switch 19b to bring the transmission state of the transmission mechanism 19 into the first transmission state in which the winding drum 11 rotates only in the direction in which the multiple main ropes 102 are wound up.

[0110] Thereafter, the operator rotates the handle 20. In response to the rotation of the handle 20, the winding drum 11 rotates, and each of the multiple main ropes 102 is wound onto the body portion 12 of the winding drum 11.

[0111] The ratchet mechanism 19c prevents the main ropes 102 from dropping even if the operator releases his / her hands from the handle 20. The operator winds up all of the main ropes 102.

[0112] <New main rope installation process> As step S10, a new main rope installation process is performed. The new main rope installation process of step S10 is performed after the winding process of step S9. The new main rope installation process is a process of connecting new main ropes 102 for suspending the car 101 and the counterweight 103 in the hoistway 110 to the car 101 and the counterweight 103 and installing them.

[0113] The new main ropes 102 are prepared in advance in the machine room 121. The worker removes the other ends of the old main ropes 102 from the replacement jig 30, and connects each of the main rope end members 102a at the other ends of the new main ropes 102 to the replacement jig 30.

[0114] The worker pulls in each new main rope 102 and lowers it together with the replacement jig 30 into the hoistway 110. The new main ropes 102 are lowered until they reach the counterweight 103. Thereafter, the worker removes the other end of each of the new main ropes 102 from the replacement jig 30 and connects the other end of each of the new main ropes 102 to the counterweight 103.

[0115] The worker winds each of the new main ropes 102 around the driving sheave and the deflector sheave 105 of the hoist 104. After that, the worker connects the main rope end member 102a at one end of each of the new main ropes 102 to the car 101. <Recovery process> In step S11, a restoration process is carried out. The restoration process in step S11 is carried out after the new main rope installation process in step S9. The restoration process is a process for restoring the elevator 100 so that it can operate normally.

[0116] The worker removes the main rope replacement device 1. At the same time, the worker removes the fixing jig that fixes the position of the car 101, and releases the fixation of the car 101. Furthermore, the worker removes the weight support 123. After that, the worker returns the elevator 100 to a normal control state. This completes the replacement work of the main rope 102 of the elevator 100, and the elevator 100 can be operated normally.

[0117] According to the main rope replacement device 1 of the first embodiment, the device 10 includes a winding device 10 having a winding drum 11 and a drum support 16 that rotatably supports the winding drum 11. The winding drum 11 has a trunk 12 and a main rope attachment portion provided on the outer circumferential surface of the trunk, and the main rope 102 of the elevator 100 can be connected to the main rope attachment portion. Therefore, an operator can easily wind up the main rope 102 by rotating the winding drum 11 rotatably supported by the drum support 16. The main rope 102 removed from the elevator 100 can be easily attached to the winding drum 11 using the main rope attachment portion. Therefore, the labor of the operator in the replacement work of the main rope can be reduced. In addition, since the main rope 102 is wound using the winding drum 11 supported by the drum support 16, the number of operators required to pull up the main rope 102 in the conventional method can be reduced.

[0118] According to the main rope replacement device 1 of the first embodiment, the winding device 10 has a handle 20 and a transmission mechanism 19 that transmits a rotational force applied to the handle 20 to the winding drum 11. The transmission mechanism 19 also has a boost mechanism 19d that amplifies the rotational force. Therefore, the worker can more easily wind the main rope 102 connected to the winding device 10 onto the winding drum 11 by using the boost mechanism 19d. This reduces the labor required by the worker in replacing the main rope.

[0119] According to the main rope replacement device 1 of the first embodiment, the transmission mechanism 19 further includes a ratchet mechanism 19c. The ratchet mechanism 19c can be set to switch the transmission state of the transmission mechanism 19 between a plurality of transmission states. The plurality of transmission states are at least a first transmission state in which only the rotational force when the handle 20 rotates in the first direction is transmitted to the winding drum 11, and a second transmission state in which only the rotational force when the handle 20 rotates in the second direction is transmitted to the winding drum 11. Therefore, for example, even if an operator carelessly releases his / her hand from the handle 20, the wound main rope 102 can be prevented from falling due to its own weight. Therefore, the labor of the operator in the replacement work of the main rope can be reduced. In addition, the operator can release his / her hand from the handle 20 even while winding the main rope 102. Therefore, the labor of the operator in the replacement work of the main rope can be reduced. In addition, the number of operators in the machine room 121 can be reduced.

[0120] According to the main rope exchange device 1 of the first embodiment, it further has a fixing member 21 for attaching the drum support 16 to a structural member provided in the machine room 121. Therefore, the main rope 102 can be wound up inside the machine room 121. This allows the worker to work inside the machine room 121, which has a good working environment. Therefore, the labor of the worker in the main rope exchange work can be reduced. In addition, the worker can easily install and fix the winding device 10 inside the machine room 121 by using the fixing member 21. Therefore, the labor of the worker in the main rope exchange work can be reduced.

[0121] According to the main rope replacement device 1 of the first embodiment, the main rope attachment portion is made of a hook member 14 on which the main rope 102 of the elevator 100 is hooked. Therefore, the main rope 102 removed from the car 101 can be easily connected to the take-up drum 11. This makes it possible to shorten the work time. This makes it possible to reduce the labor required by the worker in the work of replacing the main rope.

[0122] According to the main rope replacement device 1 of the first embodiment, the winding drum 11 is detachable from the drum support 16. Therefore, the worker can carry the winding drum 11 and the drum support 16 separately. This allows the work time to be shortened. In addition, the labor of the worker in the work of replacing the main rope can be reduced. The worker can also carry the winding drum 11 with the old main ropes 102 wound around it as is, and discard it. This allows the work time for the work of transporting and discarding the old main ropes 102 to be shortened. In addition, the labor of the worker can be reduced.

[0123] According to the main rope replacement device 1 of the first embodiment, the replacement jig 30 is further provided, and the replacement jig 30 has a replacement jig body 31 and a plurality of mounting rods 33 attached to the replacement jig body 31. The replacement jig body 31 also has a guide portion 32 that is slidable relative to a pair of counterweight guide rails 115. Therefore, the end of the main rope 102 is connected to the replacement jig 30 arranged between the pair of counterweight guide rails 115. Therefore, when the main rope 102 is wound up, it is possible to prevent the main rope 102 from swinging and interfering with the wall of the hoistway 110 and other members arranged in the hoistway 110. Therefore, it is possible to prevent damage to the elevator 100, the main rope 102, and the hoistway 110. Furthermore, it is possible to prevent the main rope 102 from getting caught on other parts in the hoistway 110 and other members arranged in the hoistway 110, so that the work time can be shortened. Therefore, it is possible to reduce the labor of the worker in the main rope replacement work.

[0124] According to the elevator main rope replacement method of the first embodiment, the main rope 102 that suspends the car 101 and the counterweight 103 in the hoistway 110 is replaced by using the main rope replacement device 1. The method also includes a winding device installation process for installing the winding device 10 in the machine room 121 provided at the top of the hoistway 110, and a car side main rope removal process for removing the main rope 102 from the car 101 after the car fixing process. The method also includes a main rope winding device connection process for connecting one end of the main rope 102 removed from the car 101 to the main rope attachment part after the winding device installation process and the car side main rope removal process. The method also includes a winding process for winding the main rope 102 around the trunk 12 by rotating the winding drum 11. Therefore, the worker can easily attach the main rope 102 to the winding drum 11 using the main rope attachment part. This reduces the labor of the worker in the main rope replacement work. Moreover, the worker can easily wind up the main rope 102 by rotating the winding drum 11. Therefore, the labor required by the worker in the work of replacing the main rope can be reduced. Moreover, since the main rope 102 is wound up using the winding drum 11, the number of workers required to pull up the main rope 102 in the conventional method can be reduced. Moreover, the worker can work inside the machine room 121, which has a good working environment. Therefore, the labor required by the worker in the work of replacing the main rope can be reduced.

[0125] According to the elevator main rope replacement method of the first embodiment, a replacement jig arrangement step is provided before the counterweight side main rope removal step, in which the replacement jig 30 is arranged between the pair of counterweight guide rails 115 so as to be slidable relative to the pair of counterweight guide rails 115. In addition, after the counterweight side main rope removal step, a main rope replacement jig connection step is provided for connecting the other end of the main rope 102 removed from the counterweight 103 to the replacement jig 30. Therefore, the other end of the main rope 102 is connected to the replacement jig 30 arranged between the pair of counterweight guide rails 115. Therefore, when the main rope 102 is wound up, it is possible to prevent the main rope 102 from swinging and interfering with the wall of the hoistway 110 and other components arranged in the hoistway 110. Therefore, it is possible to prevent damage to the elevator 100, the main rope 102, and the hoistway 110. In addition, the main rope 102 can be prevented from getting caught on other parts in the hoistway 110 and other members arranged in the hoistway 110, thereby shortening the work time. Therefore, the labor required by the worker in replacing the main rope can be reduced.

[0126] According to the elevator main rope replacement method of the first embodiment, after the winding process, a new main rope installation process is provided in which a new main rope 102 that suspends the car 101 and the counterweight 103 in the hoistway 110 is connected to the car 101 and the counterweight 103 and installed. Therefore, a worker can use the main rope replacement device 1 to wind up the old main rope 102. This reduces the labor required by the worker in replacing the main rope.

[0127] Embodiment 2 Fig. 11 is a cross-sectional view of the winding drum 11 in the second embodiment taken along the line VII-VII in Fig. 6. In the first embodiment, the main rope attachment part is the hook member 14. In the second embodiment, the main rope attachment part is a plate member 15 provided along the circumferential direction of the body part 12.

[0128] The plate member 15 is formed with an attachment hole 15a penetrating in the thickness direction of the plate member 15. The main rope 102 and the plate member 15 can be connected to each other through the attachment hole 15a.

[0129] The main rope 102 and plate member 15 are connected by sandwiching the bifurcated end of the main rope end member 102a between the plate member 15 and inserting bolts, which are connectors 102c, into each of the main rope connection holes 102b and the mounting hole 15a and tightening them with nuts.

[0130] That is, the plate member 15 has attachment holes 15a through which the connectors 102c of the main ropes 102 are passed. This connects the main ropes 102 to the winding device 10. The other configurations are the same as those in the first embodiment, and therefore will not be described.

[0131] According to the main rope exchange device 1 of the second embodiment, the main rope 102 has a connector 102c, and the main rope attachment portion is a plate member 15 having an attachment hole 15a through which the connector 102c passes. Therefore, the main rope 102 removed from the car 101 can be easily connected to the winding drum 11. This makes it possible to shorten the work time. This makes it possible to reduce the labor of the worker in the work of replacing the main rope.

[0132] According to the first embodiment, the main rope attachment part is an L-shaped hook member 14. According to the second embodiment, the main rope attachment part is a plate member 15. However, this is not limited to this. The main rope attachment part may be any member having a shape to which the main rope end member 102a can be attached.

[0133] Embodiment 3 12 is a side view showing a state in which the main rope exchange device 1 according to the third embodiment is installed in the elevator 100. According to the first embodiment, the main ropes 102 are exchanged without using the power of the hoisting machine 104. In the third embodiment, the main ropes 102 can be exchanged using the power of the hoisting machine 104.

[0134] The multiple main ropes 102 connected to the winding device 10 are hung on a drive sheave and a deflector sheave 105 of a hoist 104. If the hoist 104 is driven in this state, the multiple main ropes 102 can be moved via the drive sheave by the force of the hoist 104. The rotation direction of the hoist 104 is the direction in which the multiple main ropes 102 are wound onto the winding device 10.

[0135] The operator rotates the handle 20 in accordance with the rotation of the driving sheave, which is rotated by the power of the hoisting machine 104, and winds up the multiple main ropes 102 onto the winding drum 11. In other words, with the help of the power of the hoisting machine 104, the multiple main ropes 102 can be wound onto the winding device 10.

[0136] Furthermore, with the help of the hoist 104, the worker can let out the multiple main ropes 102 from the winding device 10. The hoist 104 is rotated so that the driving sheave of the hoist 104 allows the main ropes 102 to be let out from the winding device 10. The worker can rotate the handle 20 in accordance with the rotation of the driving sheave, which rotates by the power of the hoist 104, to let out the multiple main ropes 102 onto the winding drum 11. The other configurations are the same as those of the first or second embodiment, and therefore description thereof will be omitted.

[0137] According to the first to third embodiments, a plurality of main ropes 102 are connected to the main rope exchange device 1. However, this is not limited to this. The main rope 102 connected to the main rope exchange device 1 may be one.

[0138] Moreover, according to the first to third embodiments, a plurality of main ropes 102 are replaced. However, this is not limited to this. One main rope 102 may be replaced.

[0139] Furthermore, according to the first to third embodiments, the winding drum 11 has a plurality of hook members 14 as a plurality of main rope attachment parts, or a plurality of plate members 15 as a plurality of main rope attachment parts. However, this is not limited to this. The winding drum 11 may have one hook member 14 as one main rope attachment part, or one plate member 15 as one main rope attachment part.

[0140] Moreover, according to the first to third embodiments, the guide portion 32 is a groove. However, this is not limited thereto. For example, the guide portion 32 may have a guide roller. Moreover, the guide portion 32 may be formed of a member separate from the replacement jig body 31, and the guide portion 32 and the replacement jig body 31 may be connected and fixed to each other.

[0141] Furthermore, according to the first to third embodiments, the preparation of the new main ropes 102 in the new main rope installation process is not particularly limited. The new main ropes 102 may be prepared, for example, by being wound around a new winding drum 11. As a result, in the new main rope installation process, the winding drum 11 on which the old main ropes 102 are wound may be removed from the winding device 10, and the winding drum 11 on which the new main ropes 102 are wound may be installed on the winding device 10.

[0142] As a result, when new main ropes 102 are lowered into the hoistway 110, they can be lowered using the winding device 10. This can reduce the labor of the worker.

[0143] Also, according to the first to third embodiments, the winding device installation process in step S4 is performed after the replacement jig arrangement process in step S3. However, this is not limited to this. The winding device installation process in step S4 may be performed before the main rope winding device connection process in step S8. Furthermore, it may be performed before the car fixing process in step S1. In this case, the counterweight side main rope removal process in step S5 is performed after the replacement jig arrangement process in step S3.

[0144] According to the first to third embodiments, the step of removing the main rope on the counterweight side in step S5 is performed after the step of installing the winding device in step S4. However, this is not limited to this. The step of removing the main rope on the counterweight side in step S5 may be performed after the car fixing step in step S1 or after the counterweight supporting step in step S2.

[0145] Also, according to the first to third embodiments, the car-side main rope removal process in step S7 is performed after the main rope replacement jig connection process in step S6. However, this is not limited to this. The car-side main rope removal process in step S7 may be performed after the car fixing process in step S1. Also, the main rope take-up device connection process in step S8 may be performed after the take-up device installation process in step S4 and the car-side main rope removal process in step S7. [Explanation of symbols]

[0146] 1 main rope replacement device, 10 winding device, 11 winding drum, 12 body, 13 body side plate, 14 hook member (main rope attachment portion), 15 plate member (main rope attachment portion), 15a attachment hole, 16 drum support, 17a first side plate, 17a1 first side plate fixing portion, 17a2 first screw hole, 17b second side plate, 17b1 second side plate fixing portion, 17b2 second screw hole, 18 bottom plate, 19 transmission mechanism, 19a transmission mechanism housing, 19b switch, 19c ratchet mechanism, 19d boost mechanism, 19e output shaft, 20 handle, 21 fixing member, 22a first support portion, 22b second support portion, 30 replacement jig, 31 replacement jig main body, 32 guide portion, 33 mounting rod, 33a rod through hole, 33b Screw, 34 screw hole for rod, 100 elevator, 101 cage, 102 main rope, 102a main rope end member, 102b main rope connection hole, 102c connector, 103 counterweight, 103a counterweight body, 103b guide shoe, 103c guide groove, 104 hoist, 105 deflector, 106 fixed side connection member, 106a fixed side connection part, 106b fixed side connection part connection hole, 110 elevator shaft, 115 counterweight guide rail, 115a convex strip, 120 H-shaped steel (structural member), 121 machine room, 122 top floor, 123 counterweight support.

Claims

1. A winding device is provided, The winding device includes a winding drum and a drum support that rotatably supports the winding drum, The winding drum has a trunk portion and a main rope attachment portion provided on an outer circumferential surface of the trunk portion, A main rope of an elevator can be connected to the main rope attachment portion, The main rope has a connector, The main rope attachment portion is a plate member having an attachment hole through which the connecting tool is passed. Elevator main rope exchange device.

2. A winding device and an exchange jig, The winding device includes a winding drum and a drum support that rotatably supports the winding drum, The winding drum has a trunk portion and a main rope attachment portion provided on an outer circumferential surface of the trunk portion, A main rope of an elevator can be connected to the main rope attachment portion, The replacement jig includes a replacement jig body and a plurality of mounting rods attached to the replacement jig body, The main ropes can be attached to the plurality of mounting rods, The replacement jig body has a guide portion that is slidable relative to a pair of counterweight guide rails. Elevator main rope exchange device.

3. The main rope attachment portion is composed of a hook member to which the main rope is hung.

3. The elevator main rope exchange device according to claim 2.

4. The main rope has a connector, The main rope attachment portion is a plate member having an attachment hole through which the connecting tool is passed.

3. The elevator main rope exchange device according to claim 2.

5. The winding device has a handle and a transmission mechanism that transmits a rotational force applied to the handle to the winding drum, The transmission mechanism has a boosting mechanism that amplifies the rotational force. The elevator main rope exchange device according to any one of claims 1 to 4.

6. The transmission mechanism further includes a ratchet mechanism. The ratchet mechanism can be set to be able to switch the transmission state of the transmission mechanism between a plurality of transmission states, The plurality of transmission states include at least a first transmission state in which only the rotational force is transmitted to the winding drum when the handle is rotated in a first direction, and a second transmission state in which only the rotational force is transmitted to the winding drum when the handle is rotated in a second direction.

6. The elevator main rope exchange device according to claim 5.

7. The winding device further includes a fixing member for attaching the drum support to a structural member provided in a machine room. The elevator main rope exchange device according to any one of claims 1 to 6.

8. The winding drum is detachable from the drum support. The elevator main rope exchange device according to any one of claims 1 to 7.

9. A method for replacing a main rope of an elevator, which uses the main rope replacement device according to any one of claims 1 to 8 to replace a main rope that suspends a car and a counterweight in a hoistway, comprising: a car fixing step of fixing the car at a stop position corresponding to the top floor; a counterweight supporting step of supporting the counterweight by disposing a counterweight support vertically below the counterweight after the car fixing step; a winding device installation process for installing the winding device in a machine room provided at an upper portion of the elevator shaft; a counterweight side main rope removing step of removing the main rope from the counterweight after the counterweight supporting step; a car side main rope removing step of removing the main rope from the car after the car fixing step; a main rope winding device connecting step of connecting one end of the main rope removed from the car to the main rope attachment portion after the winding device installation step and the car side main rope removing step; a winding step of winding the main rope around the body by rotating the winding drum after the counterweight side main rope removing step and the main rope winding device connecting step; A method for replacing the main rope of an elevator equipped with the elevator.

10. a replacement jig arrangement step of arranging a replacement jig between a pair of counterweight guide rails so as to be slidable relative to the pair of counterweight guide rails before the counterweight side main rope removal step; a main rope replacement jig connecting step of connecting the other end of the main rope removed from the counterweight to the replacement jig after the counterweight side main rope removing step; Equipped with The winding process is carried out after the main rope replacement jig connecting process. The elevator main rope replacement method according to claim 9.

11. a new main rope installation step of connecting a new main rope to the car and the counterweight so as to suspend the car and the counterweight in the hoistway after the winding step, The elevator main rope replacement method according to claim 9 or 10.

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