Method for determining the holding device and rope length

Abstract

The present invention provides a holding device that can reduce the burden on workers when determining the length of an elevator rope. [Solution] The holding device 30 comprises a fixing device 31 and an attachment device 32. The fixing device 31 has a first connector 33. The attachment device 32 comprises an attachment 34 and a second connector 35. When the attachment device 32 is moved upward by the lifting device 12 so as to approach the fixing device 31, the attachment 34 comes into contact with the shackle body 24, and the fixing device 31 moves downward so as to approach the shackle body 24.

Description

Technical Field

[0001] The present disclosure relates to a holding device and a method for determining the length of a rope.

Background Art

[0002] Patent Document 1 describes a maintenance device for a rope. The maintenance device described in Patent Document 1 is used, for example, to remove the load acting on the rope when replacing or shortening the rope connected to the elevator car. When using this maintenance device, after the load acting on the rope is removed, work is required to determine the length of the new rope when replacing the rope and the length of the rope when shortening it.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventionally, in the work for determining the length of a rope, one worker pulls the rope and the rope shackle for connecting the ropes, and another worker attaches a mark for determining the length of the rope to the rope. For this reason, there is a problem that the burden on the workers is large.

[0005] The present disclosure has been made to solve the above problems. An object of the present disclosure is to provide a holding device that can reduce the burden on workers in the work for determining the length of an elevator rope. Another object of the present disclosure is to provide a method for determining the rope length using the holding device.

Means for Solving the Problems

[0006] The holding device according to this disclosure is a holding device used to determine the length of a rope that suspends an elevator car. The holding device comprises a fixing device having a first connector and that can be fixed to the rope, and an attachment device that can be attached to a rope shackle to which the rope is connected. The rope shackle comprises a rod and a shackle body provided on the rod to which the rope is connected. The attachment device comprises an attachment that can be positioned so that the rod passes through it, and a second connector provided on the attachment. When the fixing device is fixed to the rope and the attachment device is attached to the rope shackle, the attachment device moves upward or downward to approach the fixing device by a lifting device connected to the first connector and the second connector, and the attachment device comes into contact with the shackle body, causing the fixing device to move upward or downward to approach the shackle body.

[0007] The method for determining rope length according to this disclosure is a method for determining the length of a rope using the above-described holding device. The method comprises a fixing step of fixing a fixing device to the rope; an attachment step of attaching the attachment device to a rope shackle such that a rod passes through the attachment; a connecting step of connecting a lifting device to a first connector and a second connector; a moving step after the connecting step of moving the fixing device upward or downward using the lifting device so that the fixing device approaches the attachment device; and a marking step after the moving step of marking a reference position on the rope. [Effects of the Invention]

[0008] According to this disclosure, the burden on workers can be reduced in the process of determining the length of an elevator rope. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing an example of an elevator system. [Figure 2] This is a diagram showing the details of part A in Figure 1. [Figure 3] This figure shows an example of a holding device in Embodiment 1. [Figure 4] This figure shows examples of the first and second receiving members. [Figure 5] This diagram shows the state in which the first receiving member and the second receiving member are fixed by the fixing member. [Figure 6] This flowchart shows an example of a procedure for determining the length of a rope using a holding device. [Figure 7] This figure shows other examples of the first and second support members. [Modes for carrying out the invention]

[0010] A detailed explanation follows, with reference to the drawings. Repetitive explanations will be simplified or omitted as appropriate. In each drawing, the same reference numerals indicate the same or corresponding parts.

[0011] Embodiment 1. Figure 1 shows an example of an elevator system. First, the elevator system will be described with reference to Figure 1. The elevator system comprises a car 1 and a counterweight 2. The car 1 and the counterweight 2 are suspended in the hoistway 4 by a rope 3. The rope 3 is, for example, a wire rope. Figure 1 shows an example of a 1:1 roping type elevator system.

[0012] The rope 3 is wrapped around the hoisting machine 5. The control device 6 controls the hoisting machine 5. As the control device 6 controls the hoisting machine 5, the cage 1 moves up and down in the hoistway 4. The counterweight 2 moves up and down in the hoistway 4 in the opposite direction to the movement of the cage 1.

[0013] A buffer 8 for the elevator car 1 and a buffer 9 for the counterweight 2 are provided in the pit 7 of the elevator shaft 4. Buffer 8 is positioned directly below the elevator car 1. Buffer 9 is positioned directly below the counterweight 2.

[0014] Figure 2 is a diagram showing the details of part A in Figure 1. The rope shackle 20 is a device for connecting the terminal of the rope 3. In an elevator device with a 1:1 roping system as shown in Figure 1, the rope 3 is connected to the car 1 via the rope shackle 20. Figure 2 shows an example where the rope 3 is connected to the beam 10 provided in the car 1 via the rope shackle 20. In an elevator device with a 2:1 roping system, the rope 3 is connected to a fixed body in the hoistway 4 via the rope shackle 20.

[0015] The rope shackle 20 includes, for example, a rod 21, a collar 22, a spring 23, and a shackle body 24.

[0016] The rod 21 is a rod-shaped member. The rod 21 is arranged to penetrate the beam 10. The collar 22 is provided at the lower end of the rod 21. The collar 22 is arranged below the beam 10. The spring 23 is arranged between the beam 10 and the collar 22. The collar 22 receives a downward force from the spring 23.

[0017] The shackle body 24 is the part where the rope 3 is actually connected. The shackle body 24 is provided at the upper end of the rod 21. For example, the shackle body 24 is a hollow member. A first opening 25 and a second opening 26 leading to the internal space are formed in the shackle body 24. The second opening 26 communicates with the first opening 25 through the internal space of the shackle body 24. The first opening 25 is an opening for connecting the rope 3. Figure 2 shows an example where the rope 3 is connected to the shackle body 24 by being wound around a wedge (not shown) inside the shackle body 24. The rope 3 may be connected to the shackle body 24 by other connection methods.

[0018] Part B in Figure 1 is the same as part A in Figure 1. In an elevator device with a 1:1 roping system as shown in Figure 1, the other end of the rope 3 is connected to the counterweight 2 via a rope shackle.

[0019] In an elevator device, when the rope 3 becomes old, a work of replacing it with a new rope 3 is performed. Also, in the elevator device, when elongation occurs in the rope 3 and it becomes impossible to secure a sufficient interval between the counterweight 2 and the buffer 9, a work of shortening the rope 3 is performed. In such work of replacing and shortening the rope 3, it is necessary to appropriately determine the length of the rope 3 and then connect the rope 3 to the rope shackle 20 with the determined length. Hereinafter, a holding device 30 used for determining the length of the rope 3 will be described. The holding device 30 may be used in both the work of replacing and shortening the rope 3. The holding device 30 may be used in other work that requires determining the length of the rope 3.

[0020] FIG. 3 is a diagram showing an example of the holding device 30 in the first embodiment. When the work of replacing the rope 3 is performed, the rope 3 shown in FIG. 3 is a new rope. When the work of shortening the rope 3 is performed, the rope 3 shown in FIG. 3 is the rope before being shortened. As shown in FIG. 3, the rope 3 connected to the rope shackle 20 is passed from the first opening 25 through the shackle body 24, and the end portion of the rope 3 is arranged to protrude from the second opening 26. Hereinafter, the state of the rope 3 passing through the shackle body 24 as shown in FIG. 3 will also be referred to as the first state.

[0021] In the example shown in this embodiment, the determination of the length of the rope 3 is performed by marking on the rope 3 by the marker 11. The marking needs to be performed in a state where the rope shackle 20 is pulled upward and the end portion of the rope 3 is pulled downward so that there is no slack in the entire rope 3. The holding device 30 is used to maintain the state. The holding device 30 includes, for example, a fixing device 31 and a mounting device 32.

[0022] <000The fixing device 31 can be fixed to any position on the rope 3. Furthermore, the fixing device 31 can be removed from the rope 3 by performing a specific release operation on the fixing device 31 fixed to the rope 3. In other words, the fixing device 31 is detachable from the rope 3. Figure 3 shows an example in the first state in which the fixing device 31 is fixed to the portion of the rope 3 that extends upward from the first opening 25 of the shackle body 24. The fixing device 31 has a first connector 33. In the example shown in Figure 3, the first connector 33 is an annular member.

[0023] The mounting device 32 can be attached to the rope shackle 20. Furthermore, the mounting device 32 can be removed from the rope shackle 20 by performing a specific release operation on the mounting device 32 attached to the rope shackle 20. In other words, the mounting device 32 is detachable from the rope shackle 20.

[0024] The mounting device 32 includes, for example, a mounting fixture 34 and a second connector 35. The mounting fixture 34 is the part that is attached to the rope shackle 20. The mounting fixture 34 can be positioned so that the rod 21 of the rope shackle 20 passes through it. The second connector 35 is provided on the mounting fixture 34. In the example shown in Figure 3, the second connector 35 is an eyebolt.

[0025] Figure 3 shows a preferred example in which the mounting fixture 34 comprises a first receiving member 36, a second receiving member 37, and a fixing member 38. Figure 4 shows an example of the first receiving member 36 and the second receiving member 37.

[0026] The first receiving member 36 is a plate-shaped member. A first notch 39 is formed in the first receiving member 36. In the example shown in Figure 4, the first notch 39 has a certain width from the open end 39a, and the back side opposite the open end 39a is formed in a semicircular shape. Through holes 40 and 41 are also formed in the first receiving member 36. In the example shown in Figure 4, the first notch 39 is positioned between the through holes 40 and 41.

[0027] The second receiving member 37 is a plate-shaped member. A second notch 42 is formed in the second receiving member 37. In the example shown in Figure 4, the second notch 42 has a certain width from the open end 42a, and the back side opposite the open end 42a is formed in a semicircular shape. Through holes 43 and 44 are also formed in the second receiving member 37. In the example shown in Figure 4, the second notch 42 is positioned between the through holes 43 and 44.

[0028] The fixing member 38 is a member for fixing the first receiving member 36 and the second receiving member 37. Figure 3 shows a preferred example in which the fixing member 38 consists of a bolt and a nut. The first receiving member 36 and the second receiving member 37 are superimposed such that the open end 39a of the first notch 39 and the open end 42a of the second notch 42 face in opposite directions, and are fixed by the fixing member 38. Figure 5 shows the state in which the first receiving member 36 and the second receiving member 37 are fixed by the fixing member 38.

[0029] Figure 3 shows an example in which the bolt of the fixing member 38 is passed through the through holes 41 and 44 from the first receiving member 36 side and tightened to the nut on the second receiving member 37 side. As the first receiving member 36 and the second receiving member 37 are fixed by the fixing member 38, a through hole 45 is formed in the mounting fixture 34 by the first notch 39 and the second notch 42, as shown in Figure 5. The through hole 45 is a hole for passing the rod 21 of the rope shackle 20 through.

[0030] Figures 3 to 5 show a preferred example in which the eyebolt, consisting of the second connector 35, also has the function of fixing the first receiving member 36 and the second receiving member 37. Specifically, the eyebolt is passed through the through holes 40 and 43 from the first receiving member 36 side and tightened to the nut on the second receiving member 37 side. This fixes the eyebolt to the mounting fixture 34. The first receiving member 36 and the second receiving member 37 are also fixed by the eyebolt.

[0031] Next, a method for determining the length of the rope 3 using the holding device 30 will be described. Figure 6 is a flowchart showing an example of the procedure for determining the length of the rope 3 using the holding device 30.

[0032] First, the worker passes the rope 3 through the first opening 25 to the shackle body 24 and pulls out the end of the rope 3 through the second opening 26. That is, the rope 3 is positioned in the first state.

[0033] Next, in the fixing step shown in S101, the worker fixes the fixing device 31 to the rope 3 in the first state. In the fixing step, the fixing device 31 is fixed to the portion of the rope 3 that extends upward from the first opening 25.

[0034] Next, in the mounting step shown in S102, the worker attaches the mounting device 32 to the rope shackle 20 so that the rod 21 of the rope shackle 20 passes through the mounting fixture 34. Specifically, the worker moves the first receiving member 36 and the second receiving member 37 so that the rod 21 is sandwiched from both sides by the first notch 39 and the second notch 42, and overlaps the first receiving member 36 and the second receiving member 37 so that the rod 21 passes through the through hole 45. Then, in this state, the first receiving member 36 and the second receiving member 37 are fixed using the fixing member 38. The second connecting member 35 is also fixed to the mounting fixture 34.

[0035] Next, in the coupling step shown in S103, the worker connects the lifting device 12 between the first coupling 33 and the second coupling 35, as shown in Figure 3. A general chain block or the like may be used as the lifting device 12. A dedicated lifting device may also be used as the lifting device 12. In such cases, the lifting device 12 may be provided as a component of the holding device 30.

[0036] Next, in the moving step shown in S104, the worker uses the lifting device 12 to move the fixing device 31 downward so that the fixing device 31 is closer to the mounting device 32. The moving step is performed after the coupling step.

[0037] At the start of the movement step, with the fixing device 31 fixed to the rope 3 and the attachment device 32 attached to the rope shackle 20, the lifting device 12 is connected to the first connector 33 and the second connector 35. In this state, when the lifting device 12 moves upward so that the attachment device 32 approaches the fixing device 31, the attachment device 34 makes contact with the shackle body 24 from below, and the fixing device 31 moves downward so that it approaches the shackle body 24. In other words, as the movement step is performed, the rope shackle 20 is pulled upward and the rope 3 is pulled downward.

[0038] Then, after starting the operation of the lifting device 12, the worker stops the operation of the lifting device 12 when there is no slack in the rope 3. As a result, the rope shackle 20 and the rope 3 are held with the rod 21 facing vertically and the rope 3 completely taut.

[0039] Next, in the marking step shown in S105, the worker uses the marker 11 to mark a reference position on the rope 3. The reference position is the reference position for where the rope 3 will be cut. The reference position does not have to be the exact position where the rope 3 will be cut. The marking step is performed after the movement step.

[0040] In the example shown in this embodiment, the holding device 30 can hold the rope shackle 20 pulled upward and the end of the rope 3 pulled downward. The worker does not need to continue pulling the rope 3 downward until the marking on the rope 3 is complete. Therefore, the burden on the worker can be reduced in the work of determining the length of the rope 3. By using the holding device 30, it is also possible to perform this work by one person.

[0041] In this embodiment, an example in which the rope 3 is connected to the rope shackle 20 from above has been described. However, in an elevator system with a 2:1 roping system, for example, the rope 3 is connected to the rope shackle 20 from below. In such an elevator system as well, the holding device 30 may be used in the process of determining the length of the rope 3.

[0042] In this case, in the fixing step shown in S101, the fixing device 31 is fixed to the portion of the rope 3 that extends downward from the first opening 25. Also, in the moving step shown in S104, the worker moves the fixing device 31 upward using the lifting device 12 so that the fixing device 31 approaches the mounting device 32. That is, when the mounting device 32 is moved downward by the lifting device 12 so that it approaches the fixing device 31, the mounting fixture 34 makes contact with the shackle body 24 from above, and the fixing device 31 moves upward so that it approaches the shackle body 24. As the moving step is performed, the rope shackle 20 is pulled downward and the rope 3 is pulled upward.

[0043] Other examples in which the holding device 30 can be employed are described below. The holding device 30 may be employed in combination with several of the examples shown below, if possible.

[0044] Figure 7 shows another example of the first receiving member 36 and the second receiving member 37. In the example shown in Figure 7, the first notch 39 is formed so that its width gradually increases as it approaches the open end 39a. The second notch 42 is formed so that its width gradually increases as it approaches the open end 42a. In elevator equipment, a rope shackle 20 of a type that matches the diameter of the rope 3 is used. If the type of rope shackle 20 is different, the diameter of the rod 21 will also change. In the example shown in Figure 7, the mounting device 32 can be attached to various types of rope shackles 20.

[0045] Furthermore, in order to facilitate the fixing of the first receiving member 36 and the second receiving member 37 by the fixing member 38, an arc-shaped elongated hole may be formed in the first receiving member 36 as a through hole 41, as shown in Figure 7. [Explanation of Symbols]

[0046] 1 Cage, 2 Counterweight, 3 Rope, 4 Hoistway, 5 Hoisting machine, 6 Control device, 7 Pit, 8 Shock absorber, 9 Shock absorber, 10 Beam, 11 Marker, 12 Lifting device, 20 Rope shackle, 21 Rod, 22 Receiving plate, 23 Spring, 24 Shackle body, 25 First opening, 26 Second opening, 30 Holding device, 31 Fixing device, 32 Mounting device, 33 First connector, 34 Mounting device, 35 Second connector, 36 First receiving member, 37 Second receiving member, 38 Fixing member, 39 First notch, 39a Open end, 40-41 Through hole, 42 Second notch, 42a Open end, 43-45 through hole

Claims

1. A holding device used to determine the length of the rope that suspends the elevator car, A fixing device having a first connecting member and capable of being fixed to the rope, A mounting device that can be attached to a rope shackle to which the aforementioned rope is connected, Equipped with, The aforementioned rope shackle is Rod and, A shackle body is provided on the rod and to which the rope is connected, Equipped with, The aforementioned mounting device is A mounting fixture that can be positioned so that the aforementioned rod passes through it, The second connecting member provided on the aforementioned mounting bracket, Equipped with, In a state where the fixing device is fixed to the rope and the attachment device is attached to the rope shackle, when the attachment device is moved upward or downward by a lifting device connected to the first connector and the second connector so as to approach the fixing device, the attachment device comes into contact with the shackle body, causing the holding device to move upward or downward to the other direction so as to approach the shackle body.

2. The aforementioned mounting fixture is A first receiving member having a first notch formed therein, A second receiving member having a second notch formed therein, A fixing member for fixing the first receiving member and the second receiving member, Equipped with, The holding device according to claim 1, wherein when the first receiving member and the second receiving member are fixed by the fixing member, the first notch and the second notch form a through hole through which the rod passes.

3. The first notch is formed such that its width increases as it approaches the open end. The retaining device according to claim 2, wherein the second notch is formed such that its width increases as it approaches the open end.

4. The aforementioned fixing member has a bolt and a nut, The holding device according to claim 3, wherein the first receiving member has an elongated hole formed therein for passing the bolt through.

5. A method for determining the length of the rope using a holding device according to any one of claims 1 to 4, A fixing step for fixing the fixing device to the rope, An attachment step of attaching the mounting device to the rope shackle such that the rod passes through the mounting fixture, A connecting step for connecting the lifting device to the first connector and the second connector, Following the connecting step, a moving step is performed in which the lifting device moves the fixing device upward or downward so that the fixing device approaches the mounting device, After the aforementioned movement step, a marking step is performed to mark a reference position on the rope, A method for determining rope length, equipped with [a specific feature / tool].

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