Rope slack forming device and rope slack forming method

Abstract

To provide a device and a method capable of slackening a governor rope with a simple structure.SOLUTION: A rope slack formation support device 20 comprises: a base 21; and first to third protrusions 31-33. The first and second protrusions 31 and 32 are immovable against the base 21. The third protrusion 33 protrudes in a first direction D1 from the base 21. The third protrusion 33 is disposed between the first protrusion 31 and the second protrusion 32 in a vertical direction. The third protrusion 33 is movable against the base 21 in a second direction D2. The third protrusion 33 is movable against the base 21 in the second direction D2 between a first position and a second position. The first position is where the third protrusion 33 is separated from the first and second protrusions 31 and 32 in the second direction D2. The second position is where the third protrusion 33 is at least partially disposed between the first and second protrusions 31 and 32.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to a rope slack formation assisting device, a rope slack formation device, and a rope slack formation method.

Background Art

[0002] In an elevator, a governor device is installed for the purpose of speed control when the car moves up and down. When the car is in an overspeed state exceeding a predetermined speed, the governor device shuts off the power supply for driving the elevator and grips the governor rope to operate the emergency stop device of the car. Thus, the governor device is an important device for safety. In the regular inspection of an elevator, the operation inspection of the governor device is an important inspection item.

[0003] For the operation inspection of the governor device, it is necessary to allow the governor sheave to rotate freely. The governor rope travels together with the movement of the car, thereby rotating the governor sheave. To rotate the governor sheave freely, the governor rope must be removed. Tension is applied to the governor rope by a tension sheave. For this reason, as disclosed in, for example, Japanese Unexamined Patent Application Publication No. 2020-006485, a special instrument is used to lift the governor rope and remove it from the governor sheave.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

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

[0006] When pulling up the governor rope by grabbing the hand vise by hand, there is a risk that the operator may pinch a finger between the hand vise and the governor base. Also, when pulling up the hand vise using a jig, the operator needs to carry the jig for operation inspection of the governor device, which complicates the operation inspection work.

[0007] Japanese Patent Application Laid-Open No. 2016-102015 discloses a governor system capable of slackening the governor rope by moving a tensioner sheave. However, such a governor system has a complicated configuration.

[0008] The present invention has been made in consideration of such points, and an object thereof is to provide an apparatus capable of slackening a governor rope with a simple configuration and a method for slackening a governor rope.

Means for Solving the Problems

[0009] The rope slack formation assisting apparatus according to the present embodiment is a base portion disposed facing a virtual plane defined by a first rope portion and a second rope portion extending in the vertical direction on one side and the other side of the governor sheave of the governor rope wound around the governor sheave, a first protruding portion and a second protruding portion protruding in a first direction from the base portion toward the virtual plane and immovable with respect to the base portion, the first protruding portion and the second protruding portion being spaced apart from each other in the vertical direction, A third protruding portion that protrudes from the base portion in the first direction toward the virtual plane, is disposed between the first protruding portion and the second protruding portion in the vertical direction, and is movable relative to the base portion in a second direction that intersects the vertical direction and is parallel to the virtual plane. comprising The third protruding portion is movable relative to the base portion in the second direction between a first position and a second position. The first position is a position where the third protruding portion is separated from the first protruding portion and the second protruding portion in the second direction. The second position is a position where the third protruding portion is at least partially disposed between the first protruding portion and the second protruding portion, or a position on the side opposite to the first position with respect to the first protruding portion and the second protruding portion.

[0010] In addition, the rope slack forming device according to the present embodiment the above rope slack forming auxiliary device, a fixture for fixing the first rope portion and the second rope portion to the base portion, comprises.

[0011] In addition, the rope slack forming method according to the present embodiment is a method of slackening a governor rope wound around a governor sheave using the above rope slack forming device, a step of disposing the third protruding portion at the first position so that the first rope portion linearly extends vertically between the first protruding portion, the second protruding portion, and the third protruding portion; a step of moving the third protruding portion from the first position to the second position to curve the first rope portion between the first protruding portion, the second protruding portion, and the third protruding portion; a step of fixing the second rope portion to the base portion; after the step of curving the first rope portion, a step of fixing the first rope portion to the base portion on the side opposite to the side of the governor sheave with respect to the curved portion thereof; a step of returning the third protruding portion to the first position after fixing the first rope portion and the second rope portion to the base portion. comprises.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. To clarify the relationship of directions among the drawings, in some of the drawings, common directions are indicated by arrows with common reference numerals. In some of the drawings, an arrow perpendicular to the plane of the drawing is indicated by a symbol with 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 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 that extend vertically between the governor sheave 2 and the tension sheave. The first rope portion 4 extends along one side of the governor sheave 2 and the tension sheave. The second rope portion 5 extends along the other side of the governor sheave 2 and the tension sheave. In the operating state of the governor device 1, the first rope portion 4 and the second rope portion 5 extend linearly due to the tension applied by the tension sheave. In other words, in the operating state of the governor device 1, the first rope portion 4 and the second rope portion 5 extend linearly in the vertical direction.

[0016] In FIGS. 1 and 2, a virtual plane P defined by the first rope portion 4 and the second rope portion 5 of the governor rope 3 is indicated by a dashed-dotted line. The first rope portion 4 and the second rope portion 5 extend within the virtual plane P.

[0017] By the way, 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 loosen the governor rope around the governor sheave. Considering this point, the governor device 1 of the present embodiment includes a rope slack forming device 10 for loosening 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 "auxiliary device 20") and fixtures 41, 42. The auxiliary device 20 includes a base portion 21 and first to third protruding portions 31 to 33.

[0018] The base 21 faces the virtual plane P. In the illustrated example, the base 21 is fixed to a guide rail R that guides the vertical movement of the car in the hoistway. The base 21 includes a central portion 22 that supports the first to third protrusions 31 to 33, an upper end portion 23 connected to the upper edge of the central portion 22, and a lower end portion 24 connected to the lower edge of the central portion 22. The central portion 22 is flat and is generally parallel to the virtual plane P. Accordingly, the central portion 22 is parallel in the vertical direction and is also parallel to the direction D2 (hereinafter also referred to as the "second direction D2") in which the first and second rope portions 4 and 5 are arranged. The upper end portion 23 extends from the upper edge of the central portion 22 toward the virtual 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 virtual plane P in the first direction D1. As shown in FIG. 2, notches 25 through which the first and second rope portions 4 and 5 pass are formed in the upper end portion 23 and the lower end portion 24. In the illustrated example, a frame 2a is installed on the upper surface of the upper end portion 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 virtual plane P. The first to third protrusions 31 to 33 protrude from the central portion 22 in the first direction D1. The first direction D1 is a direction generally perpendicular to the virtual plane P. The first and second protrusions 31 and 32 are immovable relative to the central portion 22. The first and second protrusions 31 and 32 are spaced apart from each other in the vertical direction. The third protrusion 33 is disposed between the first and second protrusions 31 and 32 in the vertical direction. The third protrusion 33 is movable relative to the central portion 22 in the second direction D2. The second direction D2 is a direction that intersects the vertical direction and is parallel to the virtual plane P.

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

[0021] The third protruding portion 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 protruding portion 33 is in the first position, the third protruding portion 33 is spaced apart from the first protruding portion 31 and the second protruding portion 32 in the second direction D2. As shown in FIG. 3, when the third protruding portion 33 is in the second position, the third protruding portion 33 is at least partially disposed between the first protruding portion 31 and the second protruding portion 32. When the governor device 1 is operating, the third protruding portion 33 is disposed in the first position, and the first rope portion 4 extends linearly in the vertical direction between the third protruding portion 33 and the first and second protruding portions 31, 32. When the governor device 1 is being inspected for operation, the third protruding portion 33 is moved from the first position to the second position. As a result, as shown in FIG. 3, the first rope portion 4 is pushed in the second direction D2 by the third protruding portion 33 and curves between the first protruding portion 31 and the second protruding portion 32. Therefore, when the third protruding portion 33 is disposed in the second position, the trajectory of the first rope portion 4 becomes longer.

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

[0023] Each roller 35 contacts the first rope portion 4 on its outer peripheral surface. By the rotation of the portions of the protruding portions 31 to 33 that contact the first rope portion 4, the frictional force acting between the protruding portions 31 to 33 and the first rope portion 4 is reduced, and the risk of damage to the protruding portions 31 to 33 and / or the governor rope 3 due to friction is suppressed.

[0024] Further, a rope groove 36 is formed on the outer peripheral 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. Thereby, when the third protruding portion 33 is moved from the first position to the second position, the risk of the first rope portion 4 coming off the first to third protruding portions 31 to 33 is suppressed.

[0025] Each of the protruding portions 31 to 33 may further have a stopper S for stopping 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 portion 34. The roller 35 is disposed between the head of the bolt S and the main body portion 34 and is rotatable around the bolt S. By turning the bolt S and sandwiching the roller 35 between the head of the bolt S and the main body portion 34, the rotation of the roller 35 with respect to the main body portion 34 can be prevented.

[0026] The fixtures 41 and 42 can fix the governor rope 3 to the base 21. In the illustrated example, the fixtures 41 and 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 fixtures 41 and 42 fix the first rope portion 4 to the base 21 at a position farther from the governor sieve 2 than the protrusions 31 to 33 in the vertical direction.

[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 fixtures 41 and 42 in a state where the first rope portion 4 is curved between the first protrusion 31 and the second protrusion 32, even if the third protrusion 33 is returned from the second position to the first position, the first rope portion 4 can maintain the curved state between the first protrusion 31 and the second protrusion 32. That is, even after the third protrusion 33 is returned to the first position, no tension from the tension sieve is applied to the first rope portion 4, and the first rope portion 4 becomes slack between the first protrusion 31 and the second protrusion 32. Thereby, the governor rope 3 can be removed from the governor sieve 2.

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

[0029] First, as shown in FIG. 1, during the operation of the governor device 1, the third protrusion 33 is disposed at the first position. At this time, the governor rope 3 is not fixed to the base 21 by the fixtures 41 and 42. Therefore, tension is applied to the first and second rope portions 4 and 5 of the governor rope 3 from the tension sieve over their entire lengths. Thereby, the first and second rope portions 4 and 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 and 32.

[0030] Next, in order to remove the governor rope 3 from the governor sheave 2 during the operation inspection of the governor device 1, the governor rope 3 is loosened around the governor sheave 2. Specifically, as shown in FIG. 3, the second rope portion 5 is fixed to the base portion 21 by the fixture 42. Then, 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 curves 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 portion 21 using the fixture 41. More specifically, the first rope portion 4 is fixed to the base portion 21 on the side opposite to the governor sheave 2 with respect to its curved portion. In the illustrated example, the first rope portion 4 is fixed to the base portion 21 below the protruding portions 31 to 33. Since the first and second rope portions 4, 5 are fixed by the fixtures 41, 42, no tension by the tensioner sheave is applied to the curved portion of the first rope portion 4.

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

[0033] Next, the portion of the governor rope 3 wound around the governor sheave 2 is pulled up to remove the governor rope 3 from the governor sheave 2. Thus, the governor rope 3 is removed from the governor sheave 2.

[0034] Note that the fixing of the second rope portion 5 to the base portion 21 by the fixture 42 may be performed after moving the third protruding portion 33 from the first position to the second position.

[0035] In the above-described 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 thereto. As shown in FIG. 6, the second position may be a position on the side opposite to the first position with respect to the first protrusion 31 and the second protrusion 32.

[0036] The rope slack formation assisting device 20 of the above-described embodiment and its modification has a base 21 and first to third protrusions 31 to 33. The base 21 is disposed facing a virtual plane P defined by a first rope portion 4 and a second rope portion 5 of a governor rope 3 wound around a governor sheave 2. The first rope portion 4 and the second rope portion 5 extend vertically on one side and the other side of the governor sheave 2, respectively. The first and second protrusions 31, 32 protrude in a first direction D1 from the base 21 toward the virtual plane P. The first and second protrusions 31, 32 are immovable with respect to the base 21. The first and second protrusions 31, 32 are spaced apart from each other in the vertical direction. The third protrusion 33 protrudes in the first direction D1 from the base 21 toward the virtual plane P. The third protrusion 33 is disposed between the first protrusion 31 and the second protrusion 32 in the vertical direction. The third protrusion 33 is movable with respect to the base 21 in a second direction D2. The second direction D2 is a direction intersecting the vertical direction and parallel to the virtual plane P. The third protrusion 33 is movable with respect 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 spaced apart 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 side opposite to the first position with respect to the first protrusion 31 and the second protrusion 32. After curving the governor rope 3 using such an assisting device 20, by fixing the governor rope 3 in the curved state to the base 22, the governor rope 3 can be easily slackened around the governor sheave 2. Also, there is little risk of the operator getting injured, and there is no need to carry a jig.

[0037] In the above-described embodiment and its modification, each of the protruding portions 31 to 33 has a main body portion 34 connected to the base portion 21 and a roller 35 rotatable relative to the main body portion 34 about a rotation axis extending in the first direction D1. The main body portions 34 of the first protruding portion 31 and the second protruding portion 32 are fixed to the base portion 21. The main body portion 34 of the third protruding portion 33 is movable in the second direction D2 with respect to the base portion 21. In this case, when moving the third protruding portion 33 from the first position to the second position, by bringing the governor rope 3 into contact with the roller 35, the frictional force acting between the governor rope 3 and the rollers 35 of the first to third protruding portions 31 to 33 can be reduced. As a result, the risk of damage to the governor rope 3 and the roller 35 can be reduced.

[0038] In the above-described embodiment and its modification, a rope groove 36 is formed on the outer peripheral surface of the roller 35, which extends along the circumferential direction of the roller 35 and at least partially accommodates the governor rope 3. In this case, when moving the third protruding portion 33 from the first position to the second position, the risk of the governor rope 3 coming off the rollers 35 of the first to third protruding portions 31 to 33 can be reduced.

[0039] In the above-described embodiment and its modification, the rope slack formation assisting device 20 is supported by the base portion 21 and further includes a moving member 38 that moves the third protruding portion 33 in the second direction with respect to the base portion 21. In this case, the third protruding portion 33 can be easily moved between the first position and the second position.

[0040] The rope slack formation device 10 in the above-described embodiment and its modification includes the above-described rope slack formation assisting device 20 and fixtures 41 and 42 that fix the first rope portion 4 and the second rope portion 5 to the base portion 21. According to such a rope slack formation device 10, the governor rope 3 can be easily slackened around the governor sheave 2. Also, there is little risk of the operator getting injured, and there is no need to carry a jig.

[0041] The rope slack forming method of the above-described embodiment and its modification is a method of slackening the governor rope 3 wound around the governor sheave 2 using the rope slack forming device 10, and includes a step of arranging the third protrusion 33 at the 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. Further, the rope slack forming method includes a step of moving the third protrusion 33 from the first position to the second position to bend the first rope portion 4 between the first protrusion 31, the second protrusion 32, and the third protrusion 33. Further, the rope slack forming method includes a step of fixing the second rope portion 5 to the base portion 21. Further, the rope slack forming method includes a step of fixing the first rope portion 4 to the base portion 21 on the side opposite to the governor sheave 2 with respect to the bent portion after the step of bending the first rope portion 4. Further, the rope slack forming method 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. Also, there is little risk of the operator getting injured, and there is no need to carry tools.

[0042] Although embodiments of the present invention and several modifications have been described, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof. Also, of course, it is possible to appropriately combine these embodiments and modifications partially within the scope of the gist of the present invention.

Explanation of Reference Numerals

[0043] 1: Governor device, 2: Governor sieve, 3: Governor rope, 4: First rope portion, 5: Second rope portion, 10: Rope slack forming device, 20: Rope slack forming auxiliary device, 21: Base portion, 31: First protruding portion, 32: Second protruding portion, 33: Third protruding portion, 34: Main body portion, 35: Roller, 38: Moving member, 41: Fixture, 42: Fixture

Claims

1. A base portion disposed facing a virtual plane defined by a first rope portion and a second rope portion extending in the vertical direction on one side and the other side of the governor sheave of the governor rope wound around the governor sheave; First and second protruding portions that protrude in a first direction from the base portion toward the virtual plane and are immovable relative to the base portion, the first and second protruding portions being spaced apart from each other in the vertical direction; A third protruding portion that protrudes in the first direction from the base portion toward the virtual plane, is disposed between the first protruding portion and the second protruding portion in the vertical direction, intersects the vertical direction, and is movable relative to the base portion in a second direction parallel to the virtual plane; comprising: The third protruding portion is movable relative to the base portion in the second direction between a first position and a second position; The first position is a position where the third protruding portion is spaced apart from the first protruding portion and the second protruding portion in the second direction; The second position is a position where the third protruding portion is at least partially disposed between the first protruding portion and the second protruding portion, or a position on the opposite side of the first protruding portion and the second protruding portion from the first position; A rope slack formation assisting device.

2. Each protruding portion has a main body portion connected to the base portion and a roller rotatable relative to the main body portion around a rotation axis extending in the first direction; The main body portions of the first protruding portion and the second protruding portion are fixed to the base portion; The main body portion of the third protruding portion is movable relative to the base portion in the second direction. The rope slack formation assisting device according to claim 1.

3. A rope groove that extends along the circumferential direction of the roller and at least partially accommodates the governor rope is formed on the outer peripheral surface of the roller. The rope slack formation assisting device according to claim 2.

4. The rope slack formation assisting device according to claim 1, further comprising a moving member supported by the base and moving the third protrusion in the second direction with respect to the base.

5. The rope slack formation assisting device according to claim 1, and a fixture for fixing the first rope portion and the second rope portion to the base, A rope slack formation device comprising the same.

6. A slack formation method for slackening a governor rope wound around a governor sheave using the rope slack formation device according to claim 5, comprising: arranging the third protrusion at the first position such that the first rope portion linearly extends vertically 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 portion between the first protrusion, the second protrusion, and the third protrusion; fixing the second rope portion to the base; after the step of curving the first rope portion, fixing the first rope portion to the base on a side opposite to the side of the governor sheave with respect to the curved portion thereof; after fixing the first rope portion and the second rope portion to the base, returning the third protrusion to the first position; A rope slack formation method comprising the same.

Images