Rope slack forming device and rope slack forming method

Abstract

To provide a device capable of slackening a governor rope with a simple configuration and a method for slackening the governor rope. [Solution] The rope slack formation assisting device 20 has a base 21 and first to third protruding parts 31 to 33. The first and second protruding parts 31, 32 are immovable relative to the base 21. The third protruding part 33 protrudes from the base 21 in a first direction D1. The third protruding part 33 is disposed between the first protruding part 31 and the second protruding part 32 in the up-down direction. The third protruding part 33 is movable relative to the base 21 in the second direction D2. The third protruding part 33 is movable relative to the base 21 in the second direction D2 between a first position and a second position. The first position is a position where the third protruding part 33 is separated from the first protruding part 31 and the second protruding part 32 in the second direction D2. The second position is a position where the third protruding part 33 is disposed at least partially between the first protruding part 31 and the second protruding part 32.

Description

[Technical field]

[0001] An embodiment of the present invention relates to a rope slack forming assist device, a rope slack forming device, and a rope slack forming method. [Background technology]

[0002] Elevators are equipped with a governor device to regulate the speed of the car when it ascends or descends. If the car exceeds a specified speed, the governor device cuts off the power supply to drive the elevator and grasps the governor rope to activate the car's emergency stop device. In this way, the governor device is an important safety device. Inspecting the operation of the governor device is an important inspection item during regular elevator inspections.

[0003] To check the operation of the governor device, it is necessary to allow the governor sheave to rotate freely. The governor rope runs together with the movement of the car, which causes the governor sheave to rotate. In order to allow the governor sheave to rotate freely, the governor rope must be removed. The governor rope is tensioned by a tensioner sheave. For this reason, as disclosed in JP 2020-006485 A, for example, the governor rope is pulled up and removed from the governor sheave using a special tool. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-006485 A [Patent Document 2] JP 2016-102015 A Summary of the Invention [Problem to be solved by the invention]

[0005] The governor rope is pulled up, for example, as follows: When the tension on the governor rope is small, an operator holds the hand vice attached to the governor rope by hand and pulls the hand vice up onto the governor base. Alternatively, a band vice is pulled up onto the governor base using a jig. Here, the governor base supports the governor device including the governor sheave.

[0006] When pulling up the governor rope by holding the hand vice, the worker may get his / her fingers pinched between the hand vice and the governor base. In addition, when pulling up the hand vice using a jig, the worker must carry the jig to inspect the operation of the governor device, which makes the inspection process complicated.

[0007] Japanese Patent Application Laid-Open No. 2016-102015 discloses a governor system that can move a tensioner sheave to slacken a governor rope. However, such a governor system has a complicated configuration.

[0008] The present invention has been made in consideration of the above points, and an object of the present invention is to provide a device capable of slackening a governor rope with a simple configuration, and a method for slackening a governor rope. [Means for solving the problem]

[0009] The rope slack forming assist device according to this embodiment is a base portion disposed facing an imaginary plane defined by a first rope portion and a second rope portion extending in a vertical direction on one side and the other side of the governor sheave of a governor rope wound around the governor sheave; a first protrusion and a second protrusion protruding in a first direction from the base toward the imaginary plane and immovable relative to the base, the first protrusion and the second protrusion being disposed spaced apart from each other in the up-down direction; a third protrusion protruding from the base toward the imaginary plane in the first direction, the third protrusion being disposed between the first protrusion and the second protrusion in the up-down direction and movable relative to the base in a second direction that intersects with the up-down direction and is parallel to the imaginary plane; Equipped with the third protrusion is movable relative to the base in the second direction between a first position and a second position; the first position is a position where the third protrusion is spaced apart from the first protrusion and the second protrusion in the second direction, The second position is a position where the third protrusion is at least partially disposed between the first protrusion and the second protrusion, or a position opposite the first position with respect to the first protrusion and the second protrusion.

[0010] In addition, the rope slack forming device according to this embodiment is The rope slack formation assist device; a fastener for fastening the first rope portion and the second rope portion to the base; Equipped with.

[0011] Further, a rope slack forming method according to the present embodiment is a method of slackening a governor rope wound around a governor sheave by using the above-mentioned rope slack forming device, A step of disposing the third protrusion at the first position so that the first rope portion extends linearly in the vertical direction between the first protrusion, the second protrusion, and the third protrusion; moving the third protrusion from the first position to the second position to bend the first rope section between the first protrusion, the second protrusion, and the third protrusion; fastening the second rope portion to the base; after the step of bending the first rope section, fastening the first rope section to the base on an opposite side of the bent section from the governor sheave; returning the third protrusion to the first position after the first rope portion and the second rope portion are secured to the base; Equipped with. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a rope slack forming device according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of a rope slack forming assist device. [Diagram 3] FIG. 3 is a diagram for explaining a rope slack forming method using the rope slack forming device shown in FIG. [Figure 4] FIG. 4 is a diagram for explaining a rope slack forming method using the rope slack forming device shown in FIG. [Diagram 5] FIG. 5 is a diagram for explaining a rope slack forming method using the rope slack forming device shown in FIG. [Figure 6] FIG. 6 is a view corresponding to FIG. 3 and showing a modified rope slack forming device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In order to clarify the directional relationship between the drawings, some of the drawings show common directions by arrows with common symbols. In some of the drawings, an arrow perpendicular to the plane of the drawing is shown by a symbol of a dot in a circle, as shown in FIG. 1, for example.

[0014] The governor device 1 is provided in a hoistway in which an elevator car travels. As shown in Fig. 1, the governor device 1 includes a governor sheave 2, a frame 2a that supports the governor sheave 2, a tensioner sheave (not shown) provided below the governor sheave 2, and a governor rope 3 that is wound around the governor sheave 2 and the tensioner sheave. Tension is applied to the governor rope 3 in the vertical direction by the tensioner sheave.

[0015] The governor rope 3 includes a first rope portion 4 and a second rope portion 5 extending vertically between the governor sheave 2 and the tensioner sheave. The first rope portion 4 extends on one side of the governor sheave 2 and the tensioner sheave. The second rope portion 5 extends on the other side of the governor sheave 2 and the tensioner sheave. When the governor device 1 is in an operating state, the first rope portion 4 and the second rope portion 5 extend linearly due to tension applied by the tensioner sheave. In other words, when the governor device 1 is in an operating state, the first rope portion 4 and the second rope portion 5 extend linearly in the vertical direction.

[0016] 1 and 2, an imaginary plane P defined by the first rope portion 4 and the second rope portion 5 of the governor rope 3 is shown by a dashed line. The first rope portion 4 and the second rope portion 5 extend within the imaginary plane P.

[0017] Incidentally, in order to inspect the operation of the governor device, it is necessary to remove the governor rope from the governor sheave. In order to remove the governor rope from the governor sheave, it is necessary to slacken the governor rope around the governor sheave. In consideration of this point, the governor device 1 of this embodiment is provided with a rope slack forming device 10 for slackening the governor rope 3. As shown in FIG. 2, the rope slack forming device 10 includes a rope slack forming auxiliary device 20 (hereinafter also simply referred to as the "auxiliary device 20") and fixing devices 41, 42. The auxiliary device 20 includes a base 21 and first to third protrusions 31 to 33.

[0018] The base 21 faces the imaginary plane P. In the illustrated example, the base 21 is fixed to a guide rail R that guides the elevator car in the elevator. The base 21 includes a central portion 22 that supports the first to third protruding portions 31 to 33, an upper end portion 23 that connects to the upper edge of the central portion 22, and a lower end portion 24 that connects to the lower edge of the central portion 22. The central portion 22 is flat and is generally parallel to the imaginary plane P. Therefore, the central portion 22 is parallel to the up-down direction and parallel to the direction D2 (hereinafter also referred to as the "second direction D2") in which the first and second rope portions 4, 5 are arranged. The upper end portion 23 extends from the upper edge of the central portion 22 toward the imaginary plane P in a direction D1 (hereinafter also referred to as the "first direction D1") perpendicular to the central portion 22. The lower end portion 24 extends from the lower edge of the central portion 22 toward the imaginary plane P in the first direction D1. 2, the upper end 23 and the lower end 24 are formed with notches 25 through which the first and second rope portions 4, 5 pass. In the illustrated example, a frame 2a is installed on the upper surface of the upper end 23, and the frame 2a rotatably holds the governor sheave 2. In other words, the base 21 supports the governor sheave 2 via the frame 2a.

[0019] The first to third protrusions 31 to 33 each protrude from the central portion 22 toward the imaginary plane P. The first to third protrusions 31 to 33 protrude from the central portion 22 in a first direction D1. The first direction D1 is a direction substantially perpendicular to the imaginary plane P. The first and second protrusions 31, 32 are immovable relative to the central portion 22. The first and second protrusions 31, 32 are spaced apart from each other in the up-down direction. The third protrusion 33 is disposed between the first and second protrusions 31, 32 in the up-down direction. The third protrusion 33 is movable in a second direction D2 relative to the central portion 22. The second direction D2 is a direction that intersects with the up-down direction and is parallel to the imaginary plane P.

[0020] In the illustrated example, the central portion 22 is provided with a guide member 37 extending in the second direction D2, and the third protrusion 33 is movable along the guide member 37. The third protrusion 33 is moved in the second direction by a moving member 38. In the illustrated example, the moving member 38 is a jack bolt extending in the second direction D2. The jack bolt 38 is screwed into a nut 39 fixed to the central portion 22. By rotating the jack bolt, the jack bolt moves in the second direction D2 relative to the central portion 22. The third protrusion 33 is connected to the tip of the jack bolt 38, and the third protrusion 33 moves in the second direction D2 together with the jack bolt 38.

[0021] The third protrusion 33 is movable in the second direction D2 between a first position (see FIG. 1) and a second position (see FIG. 3). As shown in FIG. 1, when the third protrusion 33 is in the first position, the third protrusion 33 is separated from the first protrusion 31 and the second protrusion 32 in the second direction D2. As shown in FIG. 3, when the third protrusion 33 is in the second position, the third protrusion 33 is at least partially disposed between the first protrusion 31 and the second protrusion 32. When the governor device 1 is in operation, the third protrusion 33 is disposed in the first position, and the first rope portion 4 extends linearly in the vertical direction between the third protrusion 33 and the first and second protrusions 31, 32. When the governor device 1 is in operation inspection, the third protrusion 33 is moved from the first position to the second position. 3, the first rope portion 4 is pushed in the second direction D2 by the third protrusion 33 and curved between the first protrusion 31 and the second protrusion 32. Therefore, when the third protrusion 33 is disposed at the second position, the trajectory of the first rope portion 4 becomes longer.

[0022] As shown in FIG. 2, each of the protrusions 31 to 33 has a main body 34 connected to the central portion 22 of the base 21 and a roller 35 supported by the main body 34. The roller 35 is rotatable with respect to the main body 34. The main body 34 protrudes in a first direction D1 from the central portion 22 of the base 21 toward the imaginary plane P. The roller 35 is attached to the tip of the main body 34. The roller 35 is rotatable around a rotation axis along the first direction D1. The main bodies 34 of the first and second protrusions 31 and 32 are fixed to the central portion 22. The main body 34 of the third protrusion 33 is movable in a second direction D2 with respect to the central portion 22. In the illustrated example, the main body 34 of the third protrusion 33 is held by a guide member 37 so as to be movable in the second direction D2. In addition, the main body 34 of the third protrusion 33 is connected to a moving member 38.

[0023] Each roller 35 has its outer circumferential surface in contact with the first rope portion 4. By rotating the portions of the protruding portions 31-33 in contact with the first rope portion 4, the frictional force acting between the protruding portions 31-33 and the first rope portion 4 is reduced, and the risk of the protruding portions 31-33 and / or the governor rope 3 being damaged by friction is suppressed.

[0024] Further, a rope groove 36 is formed on the outer circumferential surface of each roller 35. The rope groove 36 extends along the circumferential direction of the roller 35 and at least partially accommodates the first rope portion 4. This reduces the risk of the first rope portion 4 coming off the first to third protruding portions 31 to 33 when the third protruding portion 33 is moved from the first position to the second position.

[0025] Each of the protrusions 31 to 33 may further have a stopper S that stops the rotation of the roller 35. In the illustrated example, the stopper S is a bolt extending in the first direction D1. The bolt S is screwed into a screw hole formed in the main body 34. The roller 35 is disposed between the head of the bolt S and the main body 34 and is rotatable around the bolt S. By turning the bolt S to sandwich the roller 35 between the head of the bolt S and the main body 34, it is possible to prevent the roller 35 from rotating relative to the main body 34.

[0026] The fixing devices 41, 42 are capable of fixing the governor rope 3 to the base 21. In the illustrated example, the fixing devices 41, 42 are attached to the lower end portion 24 of the base 21 and fix the first rope portion 4 and the second rope portion 5 to the lower end portion 24. The fixing devices 41, 42 fix the first rope portion 4 to the base 21 at a position farther from the governor sheave 2 in the up-down direction than the protruding portions 31-33.

[0027] By moving the third protrusion 33 from the first position to the second position and fixing the first rope portion 4 and the second rope portion 5 to the base 21 with the fasteners 41, 42 in a state in which the first rope portion 4 is curved between the first protrusion 31 and the second protrusion 32, the first rope portion 4 can be maintained in a curved state between the first protrusion 31 and the second protrusion 32 even when the third protrusion 33 is returned from the second position to the first position. In other words, even after the third protrusion 33 is returned to the first position, tension is not applied to the first rope portion 4 by the tensioner sheave, and the first rope portion 4 is in a slack state between the first protrusion 31 and the second protrusion 32. This allows the governor rope 3 to be removed from the governor sheave 2.

[0028] Next, a method for removing the governor rope 3 wound around the governor sheave 2 from the governor sheave 2 using the above-mentioned rope slack forming device 10 will be described.

[0029] First, as shown in FIG. 1, when the governor device 1 is in operation, the third protrusion 33 is disposed in the first position. At this time, the governor rope 3 is not fixed to the base 21 by the fasteners 41, 42. Therefore, tension is applied to the first and second rope portions 4, 5 of the governor rope 3 over their entire length from the tensioner sheave. As a result, the first and second rope portions 4, 5 extend linearly in the vertical direction. In particular, the first rope portion 3 extends linearly in the vertical direction between the third protrusion 33 and the first and second protrusions 31, 32.

[0030] Next, in order to remove the governor rope 3 from the governor sheave 2 when inspecting the operation of the governor device 1, the governor rope 3 is slackened around the governor sheave 2. Specifically, as shown in FIG. 3, the second rope portion 5 is fixed to the base 21 by the fixing device 42. Thereafter, the moving member 38 is operated to move the third protruding portion 33 from the first position to the second position. As a result, the first rope portion 4 is pushed by the third protruding portion 33 and bent between the first and second protruding portions 31, 32.

[0031] Next, as shown in FIG. 4, the first rope portion 4 is fixed to the base 21 using a fastener 41. More specifically, the first rope portion 4 is fixed to the base 21 on the opposite side of the curved portion from the governor sheave 2. In the illustrated example, the first rope portion 4 is fixed to the base 21 below the protrusions 31 to 33. Since the first and second rope portions 4, 5 are fixed by the fasteners 41, 42, no tension is applied to the curved portion of the first rope portion 4 by the tensioner sheave.

[0032] 5, while the first and second rope portions 4, 5 are fixed to the base portion 21 by the fasteners 41, 42, the moving member 38 is operated to move the third protrusion 33 from the second position to the first position. As described above, since no tension is applied to the curved portion of the first rope portion 4 by the tensioner sheave, the first rope portion 4 becomes slack between the first protrusion 31 and the second protrusion 32.

[0033] Next, the portion of the governor rope 3 that is wound around the governor sheave 2 is pulled up, and the governor rope 3 is removed from the governor sheave 2. In this manner, the governor rope 3 is removed from the governor sheave 2.

[0034] The second rope portion 5 may be fixed to the base portion 21 by the fastener 42 after the third protrusion 33 is moved from the first position to the second position.

[0035] In the above example, the second position of the third protrusion 33 is a position where the third protrusion 33 is at least partially disposed between the first protrusion 31 and the second protrusion 32, but is not limited to this. As shown in Fig. 6, the second position may be a position on the opposite side of the first position with respect to the first protrusion 31 and the second protrusion 32.

[0036] The rope slack forming assist device 20 of the embodiment and its modified example described above has a base 21 and first to third protrusions 31 to 33. The base 21 is disposed facing a virtual plane P defined by the first rope portion 4 and the second rope portion 5 of the governor rope 3 wound around the governor sheave 2. The first rope portion 4 and the second rope portion 5 extend in the up-down direction on one side and the other side of the governor sheave 2, respectively. The first and second protrusions 31, 32 protrude from the base 21 in a first direction D1 toward the virtual plane P. The first and second protrusions 31, 32 are immovable relative to the base 21. The first and second protrusions 31, 32 are disposed spaced apart from each other in the up-down direction. The third protrusion 33 protrudes from the base 21 in the first direction D1 toward the virtual plane P. The third protrusion 33 is disposed between the first protrusion 31 and the second protrusion 32 in the up-down direction. The third protrusion 33 is movable relative to the base 21 in the second direction D2. The second direction D2 is a direction intersecting the up-down direction and parallel to the virtual plane P. The third protrusion 33 is movable relative to the base 21 in the second direction D2 between a first position and a second position. The first position is a position where the third protrusion 33 is separated from the first protrusion 31 and the second protrusion 32 in the second direction D2. The second position is a position where the third protrusion 33 is at least partially disposed between the first protrusion 31 and the second protrusion 32, or a position on the opposite side of the first position with respect to the first protrusion 31 and the second protrusion 32. After bending the governor rope 3 using such an auxiliary device 20, the governor rope 3 is fixed to the base 22 in a curved state, so that the governor rope 3 can be easily slackened around the governor sheave 2. In addition, there is little risk of injury to the worker, and there is no need to carry a jig.

[0037] In the embodiment and its modified example described above, each of the protruding parts 31 to 33 has a main body 34 connected to the base 21 and a roller 35 rotatable relative to the main body 34 around a rotation axis extending in the first direction D1. The main body 34 of the first protruding part 31 and the second protruding part 32 is fixed to the base 21. The main body 34 of the third protruding part 33 is movable in the second direction D2 relative to the base 21. In this case, when the third protruding part 33 is moved from the first position to the second position, the governor rope 3 is brought into contact with the roller 35, thereby reducing the frictional force acting between the governor rope 3 and the rollers 35 of the first to third protruding parts 31 to 33. As a result, the risk of damage to the governor rope 3 and the rollers 35 can be reduced.

[0038] In the embodiment and its modified example described above, a rope groove 36 is formed on the outer circumferential surface of the roller 35, extending along the circumferential direction of the roller 35 and at least partially accommodating the governor rope 3. In this case, it is possible to reduce the risk that the governor rope 3 will come off the roller 35 of the first to third protruding portions 31 to 33 when the third protruding portion 33 is moved from the first position to the second position.

[0039] In the embodiment and its modified example described above, the rope slack formation assisting device 20 further includes a moving member 38 supported by the base 21 and configured to move the third protrusion 33 in the second direction relative to the base 21. In this case, the third protrusion 33 can be easily moved between the first position and the second position.

[0040] The rope slack making device 10 of the embodiment and its modified example described above includes the above-mentioned rope slack making auxiliary device 20, and the fasteners 41, 42 that fix the first rope portion 4 and the second rope portion 5 to the base 21. With such a rope slack making device 10, the governor rope 3 can be easily slackened around the governor sheave 2. In addition, there is little risk of injury to an operator, and there is no need to carry a jig.

[0041] The rope slack forming method of the embodiment and its modified example described above is a method for slackening the governor rope 3 wound around the governor sheave 2 by using the rope slack forming device 10, and includes a step of disposing the third protrusion 33 at a first position so that the first rope portion 4 extends linearly in the vertical direction between the first protrusion 31, the second protrusion 32, and the third protrusion 33. The rope slack forming method also includes a step of moving the third protrusion 33 from the first position to a second position to curve the first rope portion 4 between the first protrusion 31, the second protrusion 32, and the third protrusion 33. The rope slack forming method also includes a step of fixing the second rope portion 5 to the base 21. The rope slack forming method also includes a step of fixing the first rope portion 4 to the base 21 on the side opposite to the governor sheave 2 side with respect to the curved portion after the step of bending the first rope portion 4. The above-described rope slack forming method also includes a step of returning the third protrusion 33 to the first position after fixing the first rope portion 4 and the second rope portion 5 to the base portion 21. According to such a rope slack forming method, the governor rope 3 can be easily slackened around the governor sheave 2. In addition, there is little risk of injury to an operator, and there is no need to carry a jig.

[0042] Although the embodiments and some modifications of the present invention have been described, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These new embodiments and modifications can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. In addition, it is of course possible to combine these embodiments and modifications in part as appropriate within the spirit of the present invention. [Explanation of symbols]

[0043] 1: governor device, 2: governor sheave, 3: governor rope, 4: first rope portion, 5: second rope portion, 10: rope slack forming device, 20: rope slack forming auxiliary device, 21: base, 31: first protruding portion, 32: second protruding portion, 33: third protruding portion, 34: main body, 35: roller, 38: moving member, 41: fixture, 42: fixture

Claims

1. A rope slack forming auxiliary device, Fixtures and Equipped with The rope slack forming assist device is a base portion disposed facing an imaginary plane defined by a first rope portion and a second rope portion extending in a vertical direction on one side and the other side of the governor sheave of a governor rope wound around the governor sheave; a first protrusion and a second protrusion protruding in a first direction from the base toward the imaginary plane and immovable relative to the base, the first protrusion and the second protrusion being disposed spaced apart from each other in a vertical direction; a third protrusion protruding from the base toward the imaginary plane in the first direction, the third protrusion being disposed between the first protrusion and the second protrusion in the up-down direction and movable relative to the base in a second direction that intersects with the up-down direction and is parallel to the imaginary plane; a moving member supported by the base and configured to move the third protrusion in the second direction relative to the base; Equipped with the third protrusion is movable relative to the base in the second direction between a first position and a second position; the first position is a position where the third protrusion is spaced apart from the first protrusion and the second protrusion in the second direction, the second position is a position where the third protrusion is at least partially disposed between the first protrusion and the second protrusion, or a position on the opposite side of the first position with respect to the first protrusion and the second protrusion; The fastener fastens the first rope portion and the second rope portion to the base. Rope slack forming device.

2. Each protrusion has a body portion connected to the base portion and a roller rotatable relative to the body portion about a rotation axis extending in the first direction, the main body portions of the first protrusion and the second protrusion are fixed to the base, The rope slack forming device according to claim 1 , wherein the body portion of the third projection is movable in the second direction relative to the base portion.

3. 3. The rope slack forming device according to claim 2, wherein a rope groove is formed on an outer circumferential surface of the roller, the rope groove extending along a circumferential direction of the roller and accommodating at least a portion of the governor rope.

4. A method for slackening a governor rope wound around a governor sheave using the rope slack forming device according to claim 1, comprising the steps of: a step of disposing the third protrusion at the first position so that the first rope portion extends linearly in the up-down direction between the first protrusion, the second protrusion, and the third protrusion; moving the third protrusion from the first position to the second position to curve the first rope section between the first protrusion, the second protrusion, and the third protrusion; fastening the second rope portion to the base; after the step of bending the first rope portion, fastening the first rope portion to the base on a side opposite the governor sheave with respect to the bent portion; returning the third protrusion to the first position after the first rope portion and the second rope portion are secured to the base; A rope slack forming method comprising:

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