JP2016102015A - Speed governor system for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed governor system in which a slack amount of a speed governor loop is sufficiently secured by moving a tension vehicle held with a slack holding rod only by a required distance, and which facilitates performance testing of a speed governor.SOLUTION: A speed governor system 30 comprises: a speed governor loop 40 comprising a speed governing rope 40a which reciprocally moves in linkage with elevation/lowering of a car 14; a tension vehicle 36 which applies tensile force to the speed governor loop 40; a tension vehicle support arm 36b which rotatably supports the tension vehicle 36; and a support block 42 which supports the tension vehicle support arm 36b in a strut state for holding the speed governor loop 40 in a relaxed state during maintenance of a speed governor 32. A plurality of arm receivers 44a-44d have different distances L1-L4 to a bolt 41b being a swing shaft of the support block 42.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an elevator governor system, and more particularly, to an improved structure for maintaining a governor loop in a relaxed state.

  The elevator governor has, for example, a function of stopping the car via a governing rope when the ascending / descending speed of the car exceeds a specified speed. In this speed governor, for example, it is necessary to perform an operation test for confirming that the above functions are normal during maintenance and inspection. Specifically, the governor loop including the governor rope spanning the pulley of the governor is loosened to keep the pulley in a state where it is easy to idle. Then, the pulley is rotationally driven by a tool such as an electric drill and it is confirmed that the speed governor functions normally when a predetermined rotational speed is reached.

  In this regard, Patent Document 1 discloses an elevator including a tension wheel that applies tension to the governor loop and a delta arm that supports the tension wheel so as to be movable in the vertical direction.

  In such an elevator governor system, tension is applied to the governor loop by the tensioner. Therefore, it is necessary to move the tensioner to loosen the governor loop during maintenance and inspection. . For this reason, some elevator speed governor systems are provided with a slack holding rod for moving the tension wheel to a predetermined position at the time of maintenance and inspection.

JP 10-316327 A

  However, even if the tension wheel is relaxed and held by the above-mentioned slack holding rod, for example, when the governor loop is used for a short period of time and the elongation due to aging is small, the governor rope cannot be sufficiently slackened. There is a problem that it is difficult to perform an operation test of the governor.

  Therefore, an object of the present invention is to make adjustments that facilitate the operation of the governor by securing a sufficient amount of slack in the governor loop by moving the tensioner held by the slack retaining rod by a necessary distance. It is to provide a speed machine system.

  The elevator governor system according to the present invention includes a governor loop including a governor rope that reciprocates in conjunction with the raising and lowering of the car, and a governor loop when the raising and lowering speed of the car is exceeded. A speed governor that regulates speed, a tensioning wheel that applies tension to the governor loop, and a tensioning wheel support that is rotatably supported at one end by the rotation support portion and rotatably supports the tensioning wheel at the other end The arm, the slack holding rod that holds the tension wheel support arm in order to hold the governor loop in a relaxed state during maintenance of the speed governor, and the slack holding rod swingably supported by the slack holding rod, maintain the speed governor And a support block having a plurality of arm receiving portions that hold and hold the tension vehicle support arm, and the plurality of arm receiving portions have different distances to the swing axis of the support block.

  According to the elevator governor system of the present invention, the plurality of arm receivers have different distances to the swing shaft when the tensioned vehicle support arm is stretched and held. For this reason, the distance by which each arm receiving portion moves the tension vehicle support arm upward is also different, and the slack amount of the governor loop can be optimally selected. Thereby, the operator can loosen the governor loop by appropriately selecting an arm receiving portion that is easy to work. As a result, the operation test of the governor can be easily performed.

It is a figure showing the whole elevator composition containing the governor system which is an embodiment concerning the present invention. It is a figure which shows the structure of the governor system shown in FIG. It is a figure which shows the state which supported the tension vehicle with the slack holding | maintenance stick | rod of the governor system shown in FIG. It is a figure which shows the state which attached the support block to the slack holding rod shown in FIG. 3, and supported the tension wheel. It is the elements on larger scale which show the structure of the support block periphery which looked at the governor system shown in FIG. 4 from the other side. (A) is a front view which shows the support block attached to the slack holding | maintenance stick | rod of the governor system shown in FIG. 3, (b) is a side view of the support block. (A) is a front view which shows the support block of the governor system which is a modification of this invention, (b) is a side view of the support block.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  FIG. 1 is a diagram showing an overall configuration of an elevator 10 including a governor system 30 according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of the governor system 30 shown in FIG. A one-dot chain line A shown in FIG. 1 indicates a position on the upper end side of the pit. The pit means a bottom portion of the hoistway S located below the car when the car stops on the lowest floor.

  The elevator 10 includes a hoisting machine 12, a car 14, a counter weight 16, a main rope 18, guide rails 20a, 20b, 22a, 22b, and a governor system 30. The hoisting machine 12 is arranged in a pit on the lower end side of the hoistway S in the illustrated embodiment. The hoisting machine 12 raises and lowers the car 14 and the counter weight 16 relative to each other via the main rope 18.

  The car 14 has a function of moving up and down with a person or baggage, and two suspension wheels 14 a are provided on both sides of the bottom surface of the car 14 in order to bridge the main rope 18. An opening / closing door 14b is provided on the front side of the car 14, and a speed control rope mounting portion 14c is provided on a side surface of the car 14 so as to face the speed governor system 30 described in detail later. It has been. The counter weight 16 is a counterweight for reducing a load when the hoisting machine 12 lifts the car 14.

  One end of the main rope 18 is fixed to the ceiling portion with bolts or the like, passes through the two suspension wheels 14a of the car 14, and then reaches the hoisting machine 12 positioned below via the return wheel 18a on the ceiling. It is laid over. The other end of the main rope 18 is also bridged from the hoisting machine 12 to the suspension wheel 16a of the lower counter weight 16 through the ceiling return wheel 18b and then fixed to the ceiling portion with a bolt or the like.

  The guide rails 20a and 20b are erected in the pit of the hoistway S and extend to the vicinity of the ceiling. The guide rail 20a is disposed so as to face the side surface of the car 14 where the speed adjusting rope attaching portion 14c is provided. Further, the guide rail 20b is disposed so as to face the guide rail 20a with the car 14 interposed therebetween. The guide rails 20a and 20b support the car 14 so as to be movable in the vertical direction. The guide rails 22a and 22b have the same configuration as the guide rails 20a and 20b, and support the counter weight 16 so as to be movable in the vertical direction.

  As shown in FIG. 2, the governor system 30 includes a governor 32, a governor 32a, an upper end pulley 34, a tension pulley 36, an intermediate pulley 38, a governor rope 40a, and a slack holding rod 41. doing.

  As shown in FIG. 2, the speed governor 32 is fixedly supported on the guide rail 20a by a support arm 32b, and a lifting speed of the car 14 is controlled to a specified speed by a speed governor 32a on which a speed controlling rope 40a to be described later is bridged. Has a function of stopping the speed control rope 40a when the value exceeds the upper limit.

  The upper end side pulley 34 of the governor system 30 is rotatably supported near the ceiling of the hoistway S via a support arm 34a fixedly supported by the guide rail 20a. The tension wheel 36 is disposed immediately above the speed governor 32 in the pit of the hoistway S, has a weight 36a, and is rotatably supported by the rotation support portion 36c by the tension wheel support arm 36b. . The weight 36a is a weight for the tension wheel 36 to apply tension to the speed control rope 40a described later by its own weight. The tension vehicle support arm 36b is, for example, a metal plate member having a substantially rectangular shape in a side view, and one end in the longitudinal direction is rotatably supported by the rotation support portion 36c, and the other end side is The tension wheel 36 is rotatably supported. The rotation support portion 36c is fixedly supported on the guide rail 20a via the support arm 32b. In addition, in this embodiment, although the rotation support part 36c is being fixed to the guide rail 20a, you may fix to the side wall of the hoistway S, for example.

  The intermediate pulley 38 is disposed between the tension pulley 36 and the upper end side pulley 34, and is rotatably supported by an arm 38a fixedly supported by the guide rail 20a.

  The governing rope 40a forms a governor loop 40 that is wound around the upper end pulley 34, the tension pulley 36, the intermediate pulley 38, and the governor 32a in this order and returns to the upper end pulley 34. Tension is applied to the governor loop 40 by the tension wheel 36 described above. The speed control rope 40 a is fixed to the car 14 via the speed control rope attaching portion 14 c shown in FIG. 1 and reciprocates in conjunction with the raising and lowering of the car 14.

  In the present embodiment, as described above, the speed control wheel 32a, the tension wheel 36, and the intermediate pulley 38 of the speed governor 32 are arranged in the pit of the hoistway S to facilitate maintenance and inspection work. However, these configurations may be arranged, for example, in the machine room on the upper end side of the hoistway S.

  The slack holding rod 41 of the governor system 30 is fixedly supported at the lower end side by the support arm 32b, and extends obliquely upward so as to approach the guide rail 20a. The slack holding rod 41 has a function of holding and tensioning the tension wheel 36 as will be described in detail later when performing an operation test of the governor 32. Thereby, the governor loop 40 can be kept in a relaxed state during maintenance. The upper part of the slack holding rod 41 is arranged so as to face the tension wheel support arm 36b. Further, a maintenance through hole 41a for attaching a support block described later is formed on the upper part of the slack holding rod 41.

  Next, how to loosen the speed control rope 40a using the slack holding rod 41 in the speed governor system 30 will be described with reference to FIGS. FIG. 3 is a view showing a state where the tension wheel 36 is stretched and supported by the slack holding rod 41 of the governor system 30 and lifted. FIG. 4 is a view showing a state in which the support block 42 is attached to the slack holding rod 41 shown in FIG. FIG. 5 is a partially enlarged view showing the configuration of the support block 42 when the governor system 30 shown in FIG. 4 is viewed from the opposite side.

  For example, at the time of conventional maintenance inspection or the like, an operator lifts the tension vehicle support arm 36b upward, and, as shown in FIG. 3, for maintenance of the slack holding rod 41 from the opposite surface of the tension vehicle support arm 36b. The bolt 41b is inserted into the through hole 41a and protrudes directly below the tensioner support arm 36b. Thereby, the downward rotation of the tension vehicle support arm 36b is regulated via the bolt 41b. Therefore, the tensioner wheel 36 can be held so that the weight of the tensioner wheel 36 does not act on the speed control rope 40a. The bolt 41b inserted into the maintenance through hole 41a may be fixed with a nut or the like. In the present embodiment, the bolt 41b is used, but it may be fixed using, for example, a pin or the like.

  With the above configuration, the governor loop 40 of the governor rope 40a is loosened as a whole, and the governor rope spanned over the governor 32a of the governor 32 as shown by a one-dot chain line in FIG. 40a also sags and hangs down under its own weight. In this state, since the frictional resistance between the speed control rope 40a and the speed control wheel 32a is also reduced, for example, the operation test of the speed control device 32 can be performed by idling the speed control wheel 32a with an electric drill or the like. .

  However, for example, when the speed-control rope 40a is used for a short period of time, there is a case where the length of the speed-control rope 40a is less than that when the speed-control rope 40a is used for several years and the total length is short. In addition, even when the tensioning wheel 36 is stretched and supported by the slack holding rod 41 as described above, the slack of the speed control rope 40a is dispersed and absorbed by the entire speed governor loop 40, and the speed control wheel 32a is stretched. In some cases, the speed rope 40a cannot be sufficiently relaxed. In such a case, as shown by a solid line in FIG. 3, the governing rope 40 a spanned over the governor 32 a of the governor 32 is in a state of being loosened only slightly. For this reason, the governor 32a of the governor 32 cannot be idled as described above.

  Therefore, as shown in FIGS. 4 and 5, the speed governor system 30 according to the present invention further includes a support block 42 that is attached to the slack holding rod 41 and adjusts the amount of slack of the speed control rope 40 a. The support block 42 is fixed by a nut 41c shown in FIG. 5 from the opposite side by inserting a bolt 41b inserted into the maintenance through hole 41a of the slack holding rod 41 into the through hole of the support block 42. The bolt 41 b corresponds to the swing shaft of the support block 42. Thereby, the support block 42 is detachably supported by the slack holding rod 41.

  Next, a specific configuration of the support block 42 supported by the slack holding rod 41 will be described with reference to FIGS. 5 and 6. FIG. 6A is a front view showing the support block 42, and FIG. 6B is a side view showing the support block 42.

  As shown in FIGS. 6A and 6B, the support block 42 of the governor system 30 includes plate members 42a and 42b and four arm receiving portions 44a, 44b, 44c, and 44d. These plate materials 42a and 42b are substantially square metal members.

  The plate members 42a and 42b are connected and fixed so as to face each other by the four arm receiving portions 44a to 44d. In the present embodiment, the substantially square plate members 42a and 42b are used, but a substantially rectangular plate member may be used.

  Further, as shown in FIGS. 6A and 6B, through holes 43a and 43b are integrally fixed to the plate members 42a and 42b, respectively. These through holes 43a and 43b are formed so as to penetrate the plate members 42a and 42b in the thickness direction and to face each other. Thereby, the support block 42 can be detachably attached to the slack holding rod 41 via the bolt 41b inserted through the through holes 43a and 43b.

  The arm receiving portions 44a to 44d of the support block 42 are connected to the plate materials 42a and 42b, respectively, by welding or the like, for example. These arm receiving portions 44a to 44d are, for example, metal members formed in a columnar shape. Each arm receiving part 44a-44 is each arrange | positioned at the four corners of board | plate material 42a, 42b, as shown in FIG. Each of the arm receiving portions 44a to 44d is attached to a position that enters the inside by a distance α from the end surface of each side of the plate materials 42a and 42b. In the present embodiment, the distance α is set to about 10 to 15 mm, for example. This prevents the tension wheel support arm 36b supported by the arm receiving portions 44a to 44d from dropping off. Further, the length of each arm receiving portion 44a to 44d is formed to be larger than the thickness of the tension wheel support arm 36b. Thereby, the tension vehicle support arm 36b can be supported between the plate members 42a and 42b by the arm receiving portions 44a to 44d. In the present embodiment, the arm receiving portions 44a to 44d are formed in a columnar shape, but may be formed in a polygonal column shape.

  As shown in FIG. 5, each arm receiving portion 44 a to 44 d has two arm receiving portions adjacent to each other along the outer periphery of the support block 42, for example, the lower end surface of the tension vehicle support arm 36 b by the arm receiving portions 44 c and 44 d. Hold the tension. In this way, the tension vehicle support arm 36b can be stably supported by holding the tension vehicle support arm 36b by two adjacent arm receiving portions.

  “Arrows” L1 to L4 shown in FIG. 6 (a) are tensioned from bolts 41b inserted into the through holes 43a and 43b when the tensioned vehicle support arm 36b is stretched and held by the two adjacent arm receiving portions described above. Each distance to the support arm 36b is shown.

  The distance L1 corresponds to the distance from the bolt 41b to the tension vehicle support arm 36b when the tension vehicle support arm 36b is supported by the arm receiving portions 44a and 44b. Similarly, the distance L2 is the arm receiving portions 44a and 44d, the distance L3 is the arm receiving portions 44c and 44d, and the distance L4 is the arm receiving portions 44b and 44c. This corresponds to the distance to the arm 36b. In the present embodiment, as an example, the distance L1 is set to 200 mm, the distance L2 is set to 450 mm, the distance L3 is set to 600 mm, and the distance L4 is set to 300 mm. In this embodiment, the distances L1 to L4 of the arm receiving portions 44a to 44d are all different from each other. However, some of the arm receiving portions may have the same distance.

  The support block 42 according to the above configuration is attached to the slack holding rod 41 via the bolt 41b in a state where the operator lifts the tension vehicle support arm 36b upward. Then, the operator selects one of the two adjacent arm receiving portions set to the distances L1 to L4, and the selected two arm receiving portions face the tension vehicle support arm 36b. The support block 42 is rotated so that At this time, according to the desired amount of slack of the governor loop 40, for example, when the operator wants to take the amount of slack as large as possible, the operator can select the two arm receiving portions 44c and 44d having the distance L3. Good. Then, the tension vehicle support arm 36b is lowered and held on the two adjacent arm receiving portions of the support block 42. And as shown in FIG. 5, the volt | bolt 41b penetrated by the support block 42 is fixed with the nut 41c. Accordingly, the tension wheel support arm 36b supported by the slack holding rod 41 can be moved upward, and the amount of slack of the speed control rope 40a can be increased.

  According to the governor system 30 of the elevator 10 according to the above-described embodiment, the distance when the tension vehicle support arm 36b is stretched and held by the two adjacent arm receiving portions of the arm receiving portions 44a to 44d of the support block 42. L1 to L4 are different from each other. For this reason, the distance by which the two adjacent arm receiving portions move the tension vehicle support arm 36b upward is different, and the amount of slack of the governor loop 40 can be optimally selected. As a result, the operator can appropriately select two adjacent arm receiving portions that have a slack amount that facilitates work, and can loosen the governor loop 40. As a result, the operation test of the governor 32 can be easily performed.

  By configuring the support block 42 by the plate members 42a and 42b and the four arm receiving portions 44a to 44d as in the present embodiment, the support block is configured to be lighter than the case where the support block is configured by a single cube or rectangular parallelepiped metal. can do.

  In this embodiment, bolts 41b are inserted into the through holes 43a and 43b and supported by the slack holding rod 41 so as to be swingable. For example, the support block 42 is slack instead of the through holes 43a and 43b. An oscillating shaft for passing through the holding rod 41 may be provided. Similarly, a swing shaft may be provided instead of the maintenance through hole 41a of the slack holding rod 41, and the through holes 43a and 43b of the support block 42 may be inserted into the swing shaft. Moreover, you may attach the bolt 41b to the support block 42 previously, for example so that it may not fall off with a fixing bracket etc.

  In the above embodiment, the support block 42 has four arm receiving portions 44a to 44d. However, the support block 42 may have, for example, two or three arm receiving portions, or five or more arms. You may have a receiving part.

  Fig.7 (a) is a front view of the support block 52 contained in the governor system 30 which is a modification in embodiment of this invention. FIG. 7B is a side view of the support block 52.

  In the following description, only a portion having a configuration different from that of the support block 42 in the above embodiment will be described, and a description of common portions will be omitted as appropriate.

  The support block 52 is configured by sandwiching a fixing member 52a between the plate material 42a and the plate material 42b. The fixing member 52a is a metal plate having a substantially square side surface formed so that the length of one side is about 30 mm shorter than the plates 42a and 42b. Each side of the fixing member 52a is disposed so as to be substantially parallel to each side of the plate members 42a and 42b.

  The fixing member 52a has arm receiving portions 54a, 54b, 54c, and 54d. Each arm receiving portion 54a, 54b, 54c, 54d is constituted by an end face of the fixing member 52a.

  Further, the plate members 42a and 42b and the fixing member 52a are formed with through holes 56 penetrating in the thickness direction. The through hole 56 is formed at an eccentric position where the distance from the arm receiving portions 54a, 54b, 54c, 54d is different from the through holes 43a, 43b of the plate members 42a, 42b in the above embodiment.

  The speed governor system 30 of the elevator 10 according to the present invention is not limited to the configurations of the above-described embodiment and its modifications, and the matters described in the claims of the present application and their equivalent ranges Needless to say, various improvements and modifications are possible.

  10 elevator, 20a, 20b, 22a, 22b guide rail, 30 governor system, 32 governor, 32a governor, 32b, 34a support arm, 34 upper end side pulley, 36 tension vehicle, 36b tension vehicle support arm, 36c Rotation support part, 38 Intermediate pulley, 40 Speed governor loop, 40a Speed control rope, 41 Slack holding rod, 42, 52 Support block, 42a, 42b Plate material, 43a, 43b, 56 Through hole, 44a, 44b, 44c , 44d, 54a, 54b, 54c, 54d Arm receiver, L1, L2, L3, L4 distance, S hoistway.

Claims (1)

A governor loop including a governor rope that reciprocates in conjunction with the raising and lowering of the car,
A governor that regulates speed through the governor loop when the lifting speed of the car exceeds,
A tensioning wheel for applying tension to the governor loop;
A tension wheel support arm having one end rotatably supported by the rotation support portion and the other end rotatably supporting the tension wheel;
A slack holding rod that holds the tensioner support arm in tension to hold the governor loop in a relaxed state during maintenance of the speed governor;
A support block that is swingably supported by the slack holding rod and has a plurality of arm receiving portions that hold and hold the tension wheel support arm during maintenance of the speed governor;
With
The plurality of arm receivers have different distances to the swing axis of the support block.
Elevator governor system.

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