Governor and elevator

Abstract

To provide a governor and an elevator capable of easily setting an installation position of a cover.SOLUTION: A governor 13 comprises a governor rope 15, an upper pulley 12, a lower pulley 14, a tension weight 21, and a cover 25. The cover 25 has a movable cover 27 movable in a vertical direction. The movable cover 27 is installed in a position to which a rope 15b on a side at which a connection part of the governor rope 15 is provided moves with the lower pulley 14 interposed therebetween.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a governor and an elevator. [Background technology]

[0002] Conventionally, an elevator is provided with a car, a counterweight, a rope connecting the car and the counterweight, and a hoist around which the rope is wound. The elevator is also provided with a speed governor that constantly monitors the ascending and descending speed of the car and activates an emergency stop device installed in the car when the car reaches a predetermined speed or higher.

[0003] An example of such a technique is described in Patent Document 1. Patent Document 1 describes a technique that includes an endless governor rope that circulates in accordance with the ascending and descending motion of a car, and a speed governor pulley around which an upper turn-back portion of the governor rope in the vertical direction is wound. Patent Document 1 also describes a technique that includes a tension pulley around which a lower turn-back portion of the governor rope in the vertical direction is wound, and a cover portion that is disposed between the speed governor pulley and the tension pulley, has a hole through which the governor rope passes, and is capable of covering the upper surface side of the tension pulley. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-131342 A Summary of the Invention [Problem to be solved by the invention]

[0005] In addition, the cover needs to be installed in a position that does not interfere with the tension weight when the tension weight moves upward in the vertical direction due to vibration. Furthermore, the cover needs to be installed in a position that does not interfere with the connection part that connects the car and the governor rope when the car moves to the bottom. In other words, the cover needs to be installed in a position that does not interfere with the tension weight and does not interfere with the connection part, which makes it difficult to determine the installation position of the cover.

[0006] In consideration of the above problems, an object of the present invention is to provide a governor and an elevator in which the installation position of the cover can be easily set. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the object, the speed governor is a speed governor that monitors the ascending and descending speed of the elevator's ascending and descending body. The speed governor includes a speed governor rope that is connected to the ascending and descending body via a connecting part and moves in a circulating manner in accordance with the ascending and descending motion of the ascending and descending body, an upper pulley around which the speed governor rope is wound, and a lower pulley that is arranged vertically below the upper pulley and around which the speed governor rope is wound. The speed governor also includes a tension weight installed on the lower pulley, and a cover that covers the upper side of the lower pulley and the tension weight in the vertical direction. The cover has a movable cover that moves in the vertical direction. The movable cover is installed at a position where the rope on the side of the speed governor rope where the connecting part is provided moves, sandwiching the lower pulley therebetween.

[0008] The elevator also includes a lifting body that moves up and down in a hoistway, and a speed governor that monitors the lifting speed of the lifting body. The speed governor is the same as that described above. Effect of the Invention

[0009] According to the speed governor and elevator having the above configuration, the installation position of the cover can be easily set. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing an elevator according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a front view showing the configuration around a lower pulley of the speed governor according to the embodiment. [Diagram 3] 3A and 3B show the configuration around the lower pulley of the speed governor according to the embodiment, with FIG. 3A being a plan view of the cover as viewed from above, and FIG. 3B being a plan view of the entire lower pulley as viewed from above. [Figure 4] 1 is a front view showing a state in which a connecting portion is closest to a cover of a speed governor according to an embodiment. FIG. [Diagram 5] 1 is a plan view of a state in which a connecting portion is closest to a cover of a speed governor according to an embodiment, as viewed from above. FIG. [Figure 6] 1 is a front view showing a state in which a tension weight of a speed governor according to an embodiment is displaced upward in the vertical direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of a speed governor and an elevator will be described with reference to Fig. 1 to Fig. 6. In addition, the same reference numerals are used to designate common members in each drawing.

[0012] 1. Example of embodiment 1-1. Elevator configuration First, the configuration of an elevator according to an embodiment (hereinafter, referred to as "this example") will be described with reference to FIG. FIG. 1 is a schematic diagram showing an elevator.

[0013] The elevator 1 of this example is provided in a hoistway 100 formed in a building structure. As shown in Fig. 1, the elevator 1 of this example is a so-called 1:1 roping elevator. The elevator 1 includes a car 2, which is an example of a lifting body for carrying people and baggage, a main rope 3, a counterweight 4, and a hoist 5. The elevator 1 also includes an emergency stop device 10 and a governor 13.

[0014] A hoisting machine 5 is installed in a machine room 102 provided at the top of the hoistway 100. A main rope 3 is wound around a sheave of the hoisting machine 5. In addition, a deflection sheave 6 on which the main rope 3 is mounted is provided near the hoisting machine 5.

[0015] An upper part of the car 2 is connected to one end of the main rope 3, and an upper part of the counterweight 4 is connected to the other end of the main rope 3. When the hoist 5 is driven, the car 2 and the counterweight 4 move up and down in the elevator shaft. Hereinafter, the direction in which the car 2 and the counterweight 4 move up and down is referred to as the up and down direction.

[0016] The car 2 is slidably supported on two guide rails 7, 7 via a guide device. Similarly, the counterweight 4 is slidably supported on a weight-side guide rail 8 via a guide device. The guide rail 7 and the weight-side guide rail 8 extend vertically within the elevator shaft 100.

[0017] Further, two emergency stop devices 10 are provided at the bottom of the car 2 to stop the upward and downward movement of the car 2 in an emergency. The emergency stop devices 10 are disposed at the bottom of the car 2 in positions facing the guide rails 7.

[0018] The governor 13 has an upper pulley 12 and a lower pulley 14. The upper pulley 12 is installed in a machine room 102. The upper pulley 12 is provided with a speed detection mechanism (not shown). The lower pulley 14 is installed in a pit 101, which is the lower part of the elevator shaft 100. The lower pulley 14 is disposed below the upper pulley 12 in the vertical direction. A governor rope 15 is wound around the upper pulley 12 and the lower pulley 14. A tension weight 21 (see FIG. 2) is attached to the lower pulley 14. Therefore, a predetermined load is applied to the lower pulley 14 in the vertical direction by the tension weight 21. A predetermined tension is applied to the governor rope 15 wound around the lower pulley 14 via the lower pulley 14.

[0019] The governor rope 15 is formed in a so-called endless shape with both ends in the axial direction connected. The governor rope 15 is provided with a connecting portion 16. The connecting portion 16 is connected to an emergency stop device 10 provided on the car 2. The governor rope 15 circulates between the upper pulley 12 and the lower pulley 14 in accordance with the ascending and descending movement of the car 2. The upper pulley 12 detects the ascending and descending speed of the car 2 from the circulating speed of the governor rope 15.

[0020] 1-2. Configuration of the lower pulley of the governor Next, the configuration around the lower pulley 14 of the speed governor 13 will be described with reference to Figs. Fig. 2 is a front view showing the lower pulley 14. Figs. 3A and 3B are plan views of the lower pulley 14 as viewed from above. As shown in FIGS. 2 to 3B, the speed governor 13 has a lower pulley 14, a tension weight 21, a support arm 23, and a cover 25.

[0021] One end of the support arm 23 in the longitudinal direction is supported swingably via a swing shaft 24 on a fixed bracket 41 erected from the pit 101. A tension weight 21 is fixed to the other end of the support arm 23 in the longitudinal direction. A lower pulley 14 is rotatably supported via a rotating shaft 22 at an intermediate portion of the support arm 23 in the longitudinal direction. A load is applied downward in the vertical direction by the tension weight 21 to the other end of the support arm 23, thereby applying a predetermined tension to the governor rope 15 wound around the lower pulley 14.

[0022] In addition, a cover 25 is installed above the lower pulley 14 and the tension weight 21 in the vertical direction. The cover 25 has a first cover portion 26, a second cover portion 27, a rotating shaft 28, and a holding member 29. The first cover portion 26 and the second cover portion 27 are formed of flat plate-shaped members. As shown in Figs. 3A and 3B, the first cover portion 26 and the second cover portion 27 cover the lower pulley 14 and the tension weight 21 from above in the vertical direction. This cover 25 can prevent objects falling from above the elevator shaft 100 from coming into contact with the lower pulley 14 or the tension weight 21.

[0023] The first cover portion 26 and the second cover portion 27 constituting the cover 25 are installed in positions that do not interfere with the tension weight 21 when the tension weight 21 is displaced upward in the vertical direction due to vibration (see FIG. 6).

[0024] One end of the first cover part 26 in the longitudinal direction is fixed to a fixed bracket 41 via a fixing member 31. The second cover part 27 is connected to the other end of the first cover part 26 in the longitudinal direction via a rotating shaft 28. The second cover part 27 is supported by the first cover part 26 so as to be rotatable by the rotating shaft 28.

[0025] A holding member 29 is provided at the connection point between the first cover part 26 and the second cover part 27. The holding member 29 is formed of, for example, a coil spring. One end of the holding member 29 is fixed to the first cover part 26, and the other end of the holding member 29 is fixed to the second cover part 27. The holding member 29 biases the second cover part 27 upward in the vertical direction, thereby holding the second cover part 27 substantially parallel to the horizontal direction.

[0026] The holding member 29 is not limited to a coil spring, but may be a leaf spring, rubber, a weight, or any other suitable configuration.

[0027] A first insertion hole 26a is formed in the first cover portion 26. The first insertion hole 26a is a round hole formed with a size that allows the governor rope 15 to be inserted. In addition, a second insertion hole 27a is formed in the second cover portion 27. The second insertion hole 27a is a U-shaped cutout cut out at a predetermined length from the end of the second cover portion 27 opposite to the first cover portion 26 toward the first cover portion 26 side. That is, the second insertion hole 27a extends in a direction perpendicular to the up-down direction and perpendicular to the axial direction of the rotating shaft 22 and the rotating shaft 28. The second insertion hole 27a is not limited to a cutout, and may be an elongated hole extending along the longitudinal direction of the second cover portion 27.

[0028] Here, the side of the governor rope 15 that is folded back at the lower pulley 14 and does not have the connecting portion 16 is referred to as the first rope side 15a, and the side that has the connecting portion 16 is referred to as the second rope side 15b. The first rope side 15a of the governor rope 15 is inserted into the first insertion hole 26a. The second rope side 15b of the governor rope 15 is inserted into the second insertion hole 27a.

[0029] 2.Cover operation Next, the operation of the cover 25 having the above-mentioned configuration will be described with reference to FIGS. 4 and 5 are diagrams showing a state in which the connecting portion is closest to the cover.

[0030] When the car 2 moves to the bottom, as shown in Fig. 4 and Fig. 5, the connecting part 16 connecting the car 2 and the governor rope 15 approaches the cover 25 and the lower pulley 14 and comes into contact with the second cover part 27 of the cover 25. The second cover part 27 is pressed downward in the vertical direction by the connecting part 16. Then, the second cover part 27 moves downward in the vertical direction around the rotating shaft 28 against the biasing force of the holding member 29.

[0031] As described above, the second insertion hole 27a provided in the movable second cover part 27 extends along the longitudinal direction of the second cover part 27. Therefore, even if the second cover part 27 moves downward in the up-down direction as shown in Fig. 5, interference between the second insertion hole 27a and the second rope side 15b of the governor rope 15 can be prevented.

[0032] Furthermore, when the car 2 moves upward in the vertical direction from the bottom, the connecting part 16 also moves upward in the vertical direction together with the car 2. Therefore, the connecting part 16 moves away from the second cover part 27. Then, the second cover part 27 rotates upward in the vertical direction about the rotation shaft 28 by the holding member 29. Therefore, as shown in Figs. 2 to 3B, the second cover part 27 returns to its initial position substantially parallel to the horizontal direction.

[0033] Fig. 6 is a front view showing a state in which the tension weight 21 is displaced upward in the vertical direction. As shown in Fig. 6, when the tension weight 21 is displaced upward in the vertical direction due to vibration, the support arm 23 together with the tension weight 21 swings upward in the vertical direction around the swing shaft 24.

[0034] Here, the second cover part 27 is installed in a position where it does not interfere with the tension weight 21 when the tension weight 21 is displaced upward in the vertical direction due to vibration (see FIG. 6). Therefore, even if the tension weight 21 is displaced upward in the vertical direction, the tension weight 21 and the second cover part 27 do not come into contact with each other.

[0035] In this way, according to the speed governor 13 of this example, the second cover portion 27 installed on the connecting portion 16 side of the cover 25 is configured to be movable, so that it is not necessary to consider interference between the second cover portion 27 and the connecting portion 16. Therefore, the installation position of the cover 25 may be set at a position where it does not interfere with the tension weight 21 when the tension weight 21 is displaced upward in the vertical direction. As a result, the installation position of the cover 25 can be easily set.

[0036] Furthermore, when installing a new cover 25 during renovation of an existing elevator, the cover 25 can be easily installed without changing the installation positions of the lower pulley 14 and the tension weight 21.

[0037] In this example, the second cover portion 27, which is a movable cover of the cover 25, is disposed on the tension weight 21 side, but the present invention is not limited to this. The position at which the second cover portion 27, which is a movable cover, is provided is set according to the position at which the connecting portion 16 of the governor rope 15 is provided. For example, when the connecting portion 16 is provided on the opposite side to the tension weight 21 with the lower pulley 14 in between, the second cover portion 27 is provided on the opposite side to the tension weight 21. In other words, the second cover portion 27 is provided at a position where the second rope side 15b, which is the rope on the side where the connecting portion 16 of the governor rope 15 is provided, moves with the lower pulley 14 in between.

[0038] Furthermore, in this example, the second cover part 27 is movable only downward from the horizontal direction, but the present invention is not limited to this. The second cover part 27 may be movable upward from the horizontal direction. As a result, when the tension weight 21 is displaced upward in the vertical direction and comes into contact with the second cover part 27, the second cover part 27 moves upward in the vertical direction. As a result, the cover 25 can be installed without considering interference with the tension weight 21, and the installation position of the cover 25 can be easily set.

[0039] The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention described in the claims.

[0040] In the above-described embodiment, a structure has been described in which the tension weight 21 and the lower pulley 14 are supported in a cantilever manner on the fixed bracket 41 by the support arm 23, but the present invention is not limited to this. For example, the tension weight 21 and the lower pulley 14 may be supported in the vertical direction by a pair of support rails. Note that a cantilever support structure can reduce the weight of the tension weight 21 compared to a structure supported by support rails. Furthermore, a cantilever support structure can reduce the number of parts compared to a structure supported by support rails.

[0041] Furthermore, the configuration of elevator 1 is not limited to the 1:1 roping elevator shown in FIG. 1, but various other elevators such as 2:1 roping elevators and hydraulic elevators can be applied.

[0042] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but may also mean a "substantially parallel" or "substantially orthogonal" state that includes "parallel" and "orthogonal" and is within a range in which the respective functions can be exerted. [Explanation of symbols]

[0043] LIST OF SYMBOLS 1...Elevator, 2...Cab (lifting body), 3...Main rope, 4...Counterweight, 5...Hoist, 7...Guide rail, 8...Weight side guide rail, 10...Emergency stop device, 12...Upper pulley, 13...Governor, 14...Lower pulley, 15...Governor rope, 15a...First rope side, 15b...Second rope side, 16...Connecting portion, 21...Tension weight, 22...Rotating shaft, 23...Support arm, 24...Oscillating shaft, 25...Cover, 26...First cover portion, 26a...First insertion hole, 27...Second cover portion (movable cover), 27a...Second insertion hole, 28...Pivoting shaft, 29...Retaining member, 31...Fixed member, 41...Fixed bracket, 100...Hoistway, 101...pit, 102...machine room

Claims

1. In an elevator governor that monitors the speed at which an elevator body rises and falls, A governor rope that is connected to the lifting body via a connecting portion and moves in a circulating manner in accordance with the lifting and lowering motion of the lifting body; an upper pulley around which the governor rope is wound; a lower pulley disposed below the upper pulley in the up-down direction and around which the governor rope is wound; A tension weight installed on the lower pulley; A cover that covers the upper part of the lower pulley and the tension weight in the vertical direction, The cover has a movable cover that is movable in the up and down direction, The movable cover is disposed at a position where the rope on the side where the connecting portion is provided in the governor rope moves, with the lower pulley sandwiched therebetween. Governor.

2. The cover is a first cover portion fixed to the fixing bracket; a second cover portion that is rotatably supported by the first cover portion via a rotation shaft and that is the movable cover; The speed governor according to claim 1.

3. The cover has a holding member that holds the second cover portion parallel to the horizontal direction. The speed governor according to claim 2.

4. The second cover portion is movable downward in the up-down direction relative to the first cover portion via the rotation shaft. The speed governor according to claim 2.

5. The first cover portion is formed with a first insertion hole through which the governor rope is inserted, The second cover portion is formed with a second insertion hole through which the governor rope is inserted, The second insertion hole extends in a direction perpendicular to the up-down direction and perpendicular to the axial direction of the rotation shaft that supports the second cover portion. The speed governor according to claim 2.

6. a support arm that rotatably supports the lower pulley, One end of the support arm in the longitudinal direction is supported by a fixed bracket via a pivot shaft so as to be pivotable, The tension weight is fixed to the other end of the support arm in the longitudinal direction. The speed governor according to claim 1.

7. A lifting body that moves up and down within a lift shaft; a speed governor that monitors the lifting speed of the lift body, The speed governor is A governor rope that is connected to the lifting body via a connecting portion and moves in a circulating manner in accordance with the lifting and lowering motion of the lifting body; an upper pulley around which the governor rope is wound; a lower pulley disposed below the upper pulley in the up-down direction and around which the governor rope is wound; A tension weight installed on the lower pulley; A cover that covers the upper part of the lower pulley and the tension weight in the vertical direction, The cover has a movable cover that is movable in the up and down direction, The movable cover is disposed at a position where the rope on the side where the connecting portion is provided in the governor rope moves, with the lower pulley sandwiched therebetween. Elevator.

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