CN109803911B

CN109803911B - Elevator governor and elevator device

Info

Publication number: CN109803911B
Application number: CN201680089930.6A
Authority: CN
Inventors: 中山彻也; 田中雄大; 福田敏行; 久保洋辅
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2020-07-31
Anticipated expiration: 2036-11-30
Also published as: WO2018100663A1; CN109803911A

Abstract

The invention provides a speed regulator for an elevator and an elevator device using the same, wherein the speed regulator can detect the rotation of a rotating body such as a pulley with high precision by an encoder. The elevator governor is provided with a frame (31), a rotating body (pulley (22)) which is rotatably mounted to the frame (31) and rotates in accordance with the movement of a lifting body (2), and an encoder (27) which detects the rotation of the rotating body, detects the overspeed of the lifting body (2) in accordance with the rotation of the rotating body, and operates an emergency braking device when the overspeed is detected, the elevator governor is provided with a support shaft (32) which is fixed coaxially with the rotating body and rotatably supported by the frame, and the shaft of the encoder (27) and the support shaft (32) are coaxially connected to one end of the support shaft (32).

Description

Elevator governor and elevator device

Technical Field

The present invention relates to an elevator governor and an elevator apparatus using the same.

Background

An elevator apparatus is generally provided with a governor for monitoring the lifting speed of an elevator car at all times and for emergently stopping the elevator car that has fallen into a predetermined overspeed state. When the elevating speed of the elevator car exceeds the rated speed, the governor cuts off the power supply of a hoist that drives the elevator car and the power supply of a control device that controls the hoist, or activates an emergency braking device to mechanically and emergently stop the elevator car.

A technique is known in which an encoder is attached to such a governor to monitor the speed, displacement amount, and operation direction of the elevator car (see, for example, patent document 1). In this technique, a roller that comes into contact with a pulley around which a speed adjusting rope is wound is provided, and the speed, displacement amount, and running direction of an elevator car are monitored by detecting the rotation of the roller using an encoder.

Prior art documents

Patent document

Patent document 1: japanese laid-open patent publication No. 11-79587

Disclosure of Invention

Problems to be solved by the invention

In the above-described conventional technique, there is a problem that the roller in contact with the pulley may slip, and it is difficult to improve the accuracy and reliability of detection.

In view of the above, the present invention provides an elevator governor capable of accurately detecting the rotation of a rotating body such as a sheave by an encoder, and an elevator apparatus using the elevator governor.

Means for solving the problems

In order to solve the above problem, an elevator governor according to the present invention includes a frame, a rotating body rotatably attached to the frame and rotating in accordance with movement of an elevating body, and an encoder detecting rotation of the rotating body, the elevator governor detecting an overspeed of the elevating body in accordance with rotation of the rotating body and operating an emergency braking device when the overspeed is detected, the elevator governor including a support shaft fixed coaxially with the rotating body and rotatably supported by the frame, a shaft of the encoder and the support shaft being coaxially connected to one end of the support shaft.

In order to solve the above problems, an elevator apparatus according to the present invention includes an elevator body and a counterweight, a main rope for suspending the elevator body and the counterweight in a hoistway, a hoist for driving the main rope, an emergency braking device provided in the elevator body, and a governor for detecting an overspeed of the elevator body and operating the emergency braking device when the overspeed is detected, and the governor is the elevator governor according to the present invention.

Effects of the invention

According to the present invention, since the shaft of the encoder is connected to one end of the support shaft coaxially with the support shaft, the rotation of the rotating body can be detected with high accuracy by the encoder. This improves the reliability of the elevator apparatus.

Problems, structures, and effects other than those described above will be apparent from the following embodiments.

Drawings

Fig. 1 is a configuration diagram showing an elevator apparatus according to an embodiment of the present invention.

Fig. 2 is a side view showing the structure of the speed governor in the embodiment.

Fig. 3 is a front view showing a structure of the speed governor in the embodiment.

Fig. 4 schematically shows the positional relationship of the encoder-side bearing, the bearing housing, the support shaft, and the caulking portion.

Fig. 5 schematically shows the positional relationship of the bearing, the bearing housing, and the support shaft on the counter encoder side.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same constituent elements or constituent elements having similar functions are denoted by the same reference numerals.

As shown in fig. 1, in a hoistway 13 provided in a building, a lifting body 2 (in the present embodiment, an "elevator car") and a counterweight 3 are connected by a main rope 4. The main rope 4 is wound around a traction sheave 5 and a deflector sheave 6 provided in a hoist installed in a machine room formed above the hoistway 13. Therefore, the vertically movable body 2 and the counterweight 3 are suspended in the vertically movable shaft 13 by the main rope 4. The main hoist ropes 4 are driven by traction wheels 5. When the main hoist cable 4 is driven, the hoist body 2 is hoisted along the guide rail 7 in the hoist trunk 13. In addition, a control device (not shown) that controls the hoist, the governor 10, and the like are disposed in the machine room.

The vertically movable body 2 includes a plurality of rail guide devices (not shown) slidably engaged with the guide rails 7. Thereby, the vertically movable body 2 is moved up and down in the vertically movable passage 13 along the guide rail 7. That is, the guide rail 7 guides the vertically movable body 2 in the vertical direction. Here, the "ascending/descending direction" refers to a direction in which the ascending/descending body 2 and the counterweight 3 ascend/descend.

The counterweight 3 has a plurality of rail guides (not shown). These rail guide devices slidably engage with a heavy-duty guide rail (not shown) fixed to a wall surface of the lifting path 13. Thereby, the counterweight 3 is guided in the lifting direction by the guide rail for counterweight use and lifted in the lifting passage 13.

The vertically movable body 2 and the counterweight 3 are suspended in the vertically movable path 13 by the main rope 4. A main sling 4 is wound around an outer circumferential groove of the traction wheel 5. When the traction sheave 5 is driven to rotate by a driving device (e.g., a motor; not shown) provided in a hoist installed in the machine room, the main rope 4 is frictionally driven by a frictional force acting between the main rope 4 and the outer circumferential groove of the traction sheave 5. Thereby, the vertically movable body 2 and the counterweight 3 are moved up and down in the vertical path 13.

When the lifting speed of the lifting body 2 exceeds the rated speed and reaches a first overspeed (for example, 1.3 times the rated speed), the governor 10 cuts off the power supply of the driving device that drives the traction sheave 5 and the power supply of the control device that controls the driving device, respectively. When the lowering speed of the vertically movable body 2 reaches a second overspeed (for example, 1.4 times the rated speed), the governor 10 operates the emergency braking device 8. This mechanically stops the vertically movable body 2 in an emergency.

The emergency brake device 8 is provided on the vertically movable body 2, and grips the guide rail 7 with a wedge member in an emergency to stop the vertical movement of the vertically movable body 2. The operating lever 9 is pivotally supported by the vertically movable body 2 and drives the emergency brake device 8. The operating lever 9 is connected to a speed adjusting rope 21 described later.

An endless speed control rope 21 is wound around the pulley 22 of the speed controller 10 and a lower pulley 33 provided at a lower portion in the hoistway 13. The lower sheave 33 faces the sheave 22 in the vertical direction, and includes a tension weight 34 for applying tension to the speed adjusting rope 21. The speed adjusting hoist rope 21 is tensioned over the entire lifting stroke in the lifting path 13 by the tension weight 34.

The vertically movable body 2 is provided with a safety brake device 8 for gripping the guide rail 7 with a wedge member in an emergency, and a work lever 9 which drives the safety brake device 8 and is pivotally supported on the vertically movable body 2 side. A speed adjusting rope 21 is connected to the work lever 9. When the emergency brake device 8 is operated, the governor 10 grips the speed control rope 21. Thus, when the operating lever 9 is operated to cause the wedge member of the emergency braking device 8 to grip the guide rail 7, the vertically movable body 2 is quickly stopped.

The lower portions of the vertically movable body 2 and the counterweight 3 are connected by a compensating rope 11. The compensating rope 11 is wound around a compensating sheave 12 at a lower portion in the hoistway 13. The compensating sheave 12 is supported by a compensating rail (not shown) erected at the bottom of the hoistway 13 so as to be movable in the vertical direction. The load imbalance caused by the difference in length between the main slings 4 on the lifting/lowering body 2 side and the counterweight 3 side is compensated by the compensating slings 11.

Next, the structure of the governor in the present embodiment will be described.

Fig. 2 is a side view showing the structure of the speed governor in the present embodiment. Fig. 3 is a front view showing the structure of the speed governor in the present embodiment. Fig. 3 is a front view of the encoder 27 of fig. 2.

As shown in fig. 2 and 3, the governor 10 includes a speed control rope 21 (not shown in fig. 2); a pulley 22 as a rotating body;

vibrators

23, 24; a ratchet 25; a shoe mechanism 26 and an encoder 27. The speed-adjusting rope 21 is connected to the lifting body 2, and moves together with the lifting body 2 to rotate the pulley 22. The pulley 22 is provided coaxially with a support shaft 32, the support shaft 32 is rotatably supported by a frame 31 disposed in a machine room at an upper portion of the ascending/descending path 13 (fig. 1), and an annular speed adjusting sling 21 is wound around the pulley 22.

The

vibrators

23, 24 have a substantially arc shape, and are rotatably supported by an arm 35 that is provided coaxially with the pulley 22 and rotates together therewith. As shown in fig. 3, the transducer 23 has one end 23a and the other end 23b, and the one end 23a is heavier than the other end 23 b. The vibrator 24 has one end 24a and the other end 24b, and the one end 24a is heavier than the other end 24 b.

When the arm 35 rotates together with the pulley 22, the

vibrators

23, 24 rotate by centrifugal force. Therefore, the one

end portions

23a and 24a of the

vibrators

23 and 24 are displaced in a direction away from the support shaft 32, and the

other end portions

23b and 24b of the

vibrators

23 and 24 are displaced in a direction approaching the support shaft 32.

Further, a vibrator claw 36 is provided at the other end portion 23b of the vibrator 23. The vibrator claw 36 protrudes from an inner side (support shaft 32 side) side of the vibrator 23 toward the support shaft 32. When the

vibrators

23, 24 are rotated by centrifugal force and the other end portion 23b of the vibrator 23 is displaced in a direction approaching the support shaft 32, the vibrator claw 36 engages with a tooth portion (not shown) of the ratchet 25.

Detection projections

23c and 24c are provided at one ends 23a and 24a of the

vibrators

23 and 24. The

detection projections

23c and 24c project from the outer side (the side opposite to the support shaft 32) of the

vibrators

23 and 24 toward the outer periphery of the pulley 22. The

detection projections

23c and 24c contact a detection switch (not shown) when the

vibrators

23 and 24 rotate. The detection switch is attached to the frame 31, and is not shown.

The ratchet 25 is pivotally supported by the support shaft 32, is formed in a disc shape, and has one flat surface facing the

vibrators

23, 24. A tooth portion (not shown) is formed on the outer peripheral surface of the ratchet 25. The rotated oscillator 24 has its oscillator claw 36 engaged with the tooth portion of the ratchet 25. When the vibrator claw 36 engages with the tooth portion of the ratchet 25, the ratchet 25 rotates together with the pulley 22 and the

vibrators

23 and 24.

The shoe mechanism 26 includes a lever portion 41, a spring shaft 42, a grip arm 43, an urging spring 44, and a brake shoe 45.

The lever 41 is formed in a rod shape, and one end of the lever 41 in the longitudinal direction is rotatably supported by a connecting shaft 46 fixed to the ratchet 25.

The spring shaft 42 is slidably inserted into the other end of the lever 41, and penetrates the grip arm 43 and the biasing spring 44.

The grip arm 43 is rotatably supported by the frame 31, and the spring shaft 42 is inserted through one end of the grip arm 43 in a state where the one end is disposed between the lever 41 and the biasing spring 44.

The biasing spring 44 is, for example, a compression spring, and biases one end of the grip arm 43 toward the lever portion 41.

The brake shoe 45 is rotatably supported by the grip arm 43 and faces the speed control rope 21 wound around the pulley 22. The brake shoe 45 is pressed against the speed control wire 21 when the shoe mechanism 26 operates in accordance with the rotation of the ratchet 25. This stops the operation of the speed adjusting rope 21.

The encoder 27 is disposed on one side surface of the frame 31, and detects rotation of the support shaft 32 at one end of the support shaft 32. That is, the encoder 27 detects the rotation of the pulley 22.

The support shaft 32 is rotatably attached to the frame 31 at both ends thereof via an encoder-side bearing 51 and an anti-encoder-side bearing 52 as bearings. The encoder shaft 32a extends from one end of the support shaft 32, the encoder 27 attached to the side surface of the encoder-side bearing housing 53 faces the encoder shaft 32a, and the encoder shaft 32a is coaxially connected to the support shaft 32. This allows the encoder 27 to reliably detect the rotation of the pulley 22.

The encoder 27 is fixedly supported on one side surface of the frame 31 or a side surface of the encoder-side bearing housing 53 by a bracket or the like provided on the side surface, and illustration thereof is omitted.

The encoder side bearing 51 is attached to the encoder side bearing housing 53, and in this state, the encoder side bearing housing 53 is fitted and fixed in a hole provided in one side surface of the frame 31. The anti-encoder side bearing 52 is attached to the anti-encoder side bearing housing 54, and in this state, the anti-encoder side bearing housing 54 is fitted and fixed in a hole provided in the other side surface of the frame 31.

Here, in the present embodiment, the frame 31 is formed by bending a thin plate-like steel plate having a thickness of about several mm to 7 mm. This makes it possible to reduce the size and weight of the governor. In the present embodiment, the support shaft 32 is supported by bearings attached to bearing housings fixed to the frame 31 so as to be supported at both ends, and therefore, even if the frame 31 is formed of a thin plate, the mechanical strength is improved.

The encoder side bearing 51 is restrained from displacement in the axial direction of the support shaft 32, i.e., in the left-right direction in fig. 2, by

caulking portions

53a, 53b provided in the encoder side bearing housing 53. That is, the encoder side bearing 51 is coupled to the encoder side bearing housing 53 by the

caulking portions

53a and 53b as a coupling mechanism, and becomes a so-called fixed side bearing.

In the present embodiment, the encoder side bearing 51 is constituted by a rolling bearing including an outer ring 51b and an inner ring 51a, and rolling elements (rollers, balls, etc.) located between the outer ring 51b and the inner ring 51 a.

In the present embodiment, the caulking portion 53b is formed by partially plastically deforming a portion of the encoder-side bearing housing 53 adjacent to the encoder-side bearing 51 by impact or the like. Therefore, the caulking portion 53b is provided integrally with the encoder-side bearing housing 53, extends toward the support shaft 32, and abuts against one side surface of the outer ring 51b of the encoder-side bearing 51 that faces the pulley 22. The caulking portion 53a is located only in the side surface of the outer ring 51b out of the side surfaces of the encoder side bearing 51. The caulking portion 53b is formed so as not to deform or damage the rolling elements, the inner ring 51a, and the outer ring 51 b.

The caulking portion 53a is also formed in the same manner, and abuts against the other side surface of the encoder side bearing 51 facing the encoder 27. Such caulking restricts the encoder-side bearing 51 from moving in the axial direction of the support shaft 32.

The encoder-side surface of the anti-encoder-side bearing 52 is free from constraint, and a gap L (fig. 2) is formed between the encoder-side surface and the anti-encoder-side bearing housing 54 to allow movement in the axial direction, that is, the anti-encoder-side bearing 52 is a so-called free-side bearing, and thus, by setting the encoder-side bearing 51 to the fixed side and the anti-encoder-side bearing 52 to the free side, expansion and contraction of the support shaft 32 in the longitudinal direction, which is the axial direction, due to temperature change can be avoided to the free side, and displacement of the support shaft 32 to the fixed side due to thermal expansion can be prevented, and therefore, even if the support shaft 32 thermally expands, stress received by the encoder 27 via the encoder shaft 32a can be suppressed, and damage or breakage of the encoder 27 can be prevented.

As shown in fig. 2, the diameter of the opening of the anti-encoder-side bearing housing 54 that faces the outside of the speed governor 10 is smaller than the diameter of the anti-encoder-side bearing 52. This positions the anti-encoder side bearing 52 and prevents the anti-encoder side bearing 52 from coming off. Further, the diameter of the opening portion of the encoder-side bearing housing 53 toward the encoder 27 is smaller than the diameter of the encoder-side bearing 51. This positions the encoder side bearing 51 and prevents the encoder side bearing 51 from coming off.

In the present embodiment, the anti-encoder side bearing 52 is constituted by a rolling bearing, as in the encoder side bearing.

In the present embodiment, the inner ring 52a of the anti-encoder-side bearing 52 shown in fig. 5 is fitted to the rotating support shaft 32. Therefore, the inner race 52a is fitted to the support shaft 32 by so-called interference fit. That is, the inner race 52a is fixed to the support shaft 32 and set to a so-called fixed side.

Further, the outer ring 52b of the anti-encoder-side bearing 52 shown in fig. 5 is fitted to the anti-encoder-side bearing housing 54 which is stationary without rotating, and therefore, the outer ring 51b and the anti-encoder-side bearing housing 54 are fitted by so-called clearance fit, that is, the outer ring 52b is slidable with respect to the anti-encoder-side bearing housing 54, that is, is set to a so-called free side, and therefore, in the present embodiment, a gap L (fig. 2) is provided on the outer ring 52b side, and this gap L serves as an escape portion against expansion of the support shaft 32 due to thermal expansion.

Although the encoder side bearing 51 is fixed to the encoder side bearing housing 53 by caulking, the encoder side bearing 51 is fitted to the encoder side bearing housing 53 and the counter encoder side by clearance fit in the same manner.

Next, the operation of the governor 10 will be described with reference to fig. 3.

During normal operation of the elevator apparatus 1, the ratchet 25 of the governor 10 is in an initial state (stationary state). When the vertically movable body 2 (fig. 1) is lowered, the speed adjusting rope 21 moves together with the vertically movable body 2 and rotates the pulley 22 in a clockwise direction (arrow R1) in fig. 3 (hereinafter referred to as "R1 direction"). Since the arm 35 to which the

vibrators

23, 24 are attached also rotates together with the pulley 22, a centrifugal force acts on the

vibrators

23, 24. When the centrifugal force exceeds the resistance of a balance spring (not shown) as a vibrator biasing member, the

vibrators

23, 24 rotate about the mounting portion mounted on the arm 35.

Here, when the lifting speed of the lifting body 2 (fig. 1) reaches the first overspeed (for example, 1.3 times the rated speed), the one

end portions

23a, 24a of the

vibrators

23, 24 come into contact with a detection switch (not shown). Thereby, the governor 10 detects that the lifting speed of the lifting body 2 reaches the first overspeed. When the first overspeed is detected, the power supply of a drive device (not shown) that drives the traction wheel 5 and the power supply of a control device (not shown) that controls the drive device are cut off.

When the lowering speed of the vertically movable body 2 reaches a second overspeed (for example, 1.4 times the rated speed) greater than the first overspeed, the vibrator claw 36 of the rotating vibrator 23 engages with the teeth of the ratchet 25, and the ratchet 25 is rotated in the R1 direction by the rotation of the vibrator 23 about the support shaft 32. That is, the governor 10 starts a trip operation (an emergency braking operation). When the ratchet 25 rotates, the lever 41 moves in the R1 direction and presses the grip arm 43, and therefore the grip arm 43 rotates in the R1 direction.

When the grip arm 43 is turned in the direction of R1, the brake shoe 45 is pressed against the speed control wire 21 wound around the pulley 22, and grips the speed control wire 21. This stops the movement of the speed adjusting rope 21. At this time, the lifting body 2 continues to descend, and therefore, the operating lever 9 connected to the speed adjusting rope 21 and provided in the lifting body is lifted up. Thereby, the emergency brake device 8 operates to mechanically and emergently stop the vertically movable body 2.

Next, the operation of the encoder 27 will be described with reference to fig. 2 and 3.

When the vertically movable body 2 (fig. 1) is lowered, the speed adjusting rope 21 moves together with the vertically movable body 2 and rotates the pulley 22 in the direction of R1. On the other hand, when the vertically movable body 2 is raised, the speed adjusting rope 21 moves together with the vertically movable body 2 and rotates the pulley 22 in a counterclockwise direction (arrow R2) in fig. 3 (hereinafter referred to as "R2 direction").

Here, the support shaft 32 is provided coaxially with the pulley 22, and both ends of the support shaft 32 are rotatably attached to the frame 31 via the encoder side bearing 51 and the anti-encoder side bearing 52. Therefore, when the pulley 22 is rotated by the lowering and raising of the vertically movable body 2, the support shaft 32 is also rotated.

In accordance with the rotation of the support shaft 32, the encoder shaft 32a extending from one end of the support shaft 32 also rotates, and the rotation of the encoder shaft 32a is detected by the encoder 27. Then, a control device (not shown) of the elevator apparatus 1 calculates the speed of the vertically movable body 2 based on the interval of the pulse signal input from the encoder 27, or calculates the position of the vertically movable body 2 in the hoistway 13 based on the respective signals from the car position sensor and the encoder 27.

As described above, according to the present embodiment, since the encoder 27 is coaxially coupled to the support shaft 32, the rotation of the support shaft 32 is directly detected by the encoder 27. This enables the encoder 27 to detect the rotation of the pulley 22 with high accuracy.

The encoder side bearing 51 is set to a fixed side, and the anti-encoder side bearing 52 is set to a free side. This makes it possible to avoid the extension of the support shaft 32 due to thermal expansion toward the anti-encoder side. Therefore, even if the encoder 27 is coaxially coupled to the support shaft 32, stress applied to the encoder 27 by the support shaft 32 that is thermally expanded can be suppressed, and thus damage or breakage of the encoder 27 can be prevented.

Further, the encoder-side bearing 51 set as the fixed side can be reliably restrained from moving in the axial direction by the

caulking portions

53a and 53b without increasing the number of components.

In the present embodiment, the support shaft 32 is supported so as to be supported at both ends by the encoder-side bearing 51 and the anti-encoder-side bearing 52 which are fitted into the encoder-side bearing housing 53 and the anti-encoder-side bearing housing 54 fixed to the frame 31, respectively. Thereby, the encoder 27 mounted coaxially with the support shaft 32 can be rotated stably. Further, the frame 31 made of a bent thin plate can be reduced in size and weight, and can secure mechanical strength.

In the elevator apparatus including the governor 10 of the present embodiment, the accuracy of detecting the operating state (speed, amount of movement (amount of displacement), operating direction, and the like) of the vertically movable body 2 is improved. Therefore, the control accuracy is improved, and the reliability of the elevator apparatus is improved.

The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail to explain the present invention easily and understandably, and are not limited to having all the configurations described. In addition, in some of the configurations of the embodiments, addition, deletion, and replacement of another configuration can be performed.

For example, instead of the caulking portion, a coupling mechanism for coupling the encoder side bearing 51 and the encoder side bearing housing 53 may be a coupling mechanism for coupling the encoder side bearing 51 and the encoder side bearing housing 53 by a coupling member made of a thin plate piece or the like.

As the bearing (bearing), another bearing that rotatably supports the support shaft may be applied instead of the rolling bearing in the above embodiment.

In addition, the frame 31 may be formed of a casting.

The elevator apparatus may be a so-called machine room-less elevator in which a hoisting machine and a control device are provided in a hoistway.

The speed governor is not limited to the rope type as in the above embodiment, and may be a so-called rope-less speed governor. The hoist-rope-less governor is provided on the vertically movable body, and the rotating body corresponding to the pulley 22 rotates together with the movement of the vertically movable body by, for example, coming into contact with the vertically movable guide rail.

Description of reference numerals:

1 … elevator apparatus, 2 … elevator body, 3 … counterweight, 4 … main sling, 5 … traction wheel, 6 … deflection wheel, 7 … guide rail, 8 … emergency brake device, 9 … working rod, 10 … governor, 11 … compensation sling, 12 … compensation pulley, 13 … elevator passage, 21 … governor sling, 22 … pulley, 23, 24 … vibrator, 25 … ratchet, 26 … shoe mechanism, 27 … encoder, 31 … frame, 32 … support shaft, 32a … encoder shaft, 33 … lower pulley, 34 … tension counterweight, 35 … arm, 36 … vibrator claw, 41 … rod, 3642 spring shaft, 43 … holding arm, 44 … forcing spring, 45 … brake shoe, 51 … encoder rivet bearing, 52 … side encoder, 3653 side bearing housing, 3653 a, 53b …, … side bearing housing, … encoder housing, … side bearing housing, … side encoder housing, … side gap encoder housing, … side encoder housing.

Claims

1. A speed governor for an elevator, comprising:

a frame;

a rotating body rotatably attached to the frame and rotating in accordance with movement of the elevating body; and

an encoder that detects rotation of the rotating body,

the elevator governor detects an overspeed of the elevating body in accordance with rotation of the rotating body, and activates an emergency braking device when the overspeed is detected,

the speed governor for an elevator is characterized in that,

the elevator governor includes a support shaft that is fixed coaxially with the rotating body and is rotatably supported by the frame,

the shaft of the encoder is connected to one end of the support shaft coaxially with the support shaft,

the one end and the other end of the support shaft are rotatably supported by a first bearing and a second bearing, respectively,

the first bearing and the second bearing are respectively embedded in a first bearing shell and a second bearing shell which are fixed on the frame,

the frame is formed of a thin plate-like member, holes are provided in the flat surfaces of the thin plate-like member in the opposite side surfaces of the frame, respectively,

the first bearing housing and the second bearing housing are fitted in the holes provided in one and the other of the opposing side surfaces,

the first bearing is constrained against movement in an axial direction relative to the first bearing housing,

the elevator governor includes a coupling mechanism for coupling a side surface of the first bearing housing and a side surface of the first bearing,

the movement of the first bearing in the axial direction is restrained by the coupling mechanism,

the coupling mechanism is constituted by a caulking portion extending from a side surface of the first bearing housing to the first bearing,

the rivet is integrally formed to the first bearing housing by locally plastically deforming a portion of the first bearing housing adjacent to the first bearing.

2. The governor for an elevator according to claim 1,

the second bearing is provided as a free side.

3. The governor for an elevator according to claim 1,

the second bearing is axially slidable relative to the second bearing housing.

4. The governor for an elevator according to claim 3,

a gap is provided between a side surface of the second bearing opposite to the encoder and the second bearing housing.

5. The governor for an elevator according to claim 1,

the first bearing and the second bearing are respectively composed of a first rolling bearing and a second rolling bearing,

inner rings of the first rolling bearing and the second rolling bearing are fitted to the support shaft and set as a fixed side,

the outer rings of the first rolling bearing and the second rolling bearing are set to be free sides.

6. The governor for an elevator according to claim 1,

a side surface of the first bearing housing is in contact with the one of the opposing side surfaces of the frame,

a side surface of the second bearing housing contacts the other of the opposing side surfaces of the frame.

7. The governor for an elevator according to claim 1,

the thickness of the thin plate-like member is 7mm or less.

8. An elevator device is provided with:

a lifting body and a balancing weight;

a main hoist rope for suspending the hoist and the counterweight in a hoist trunk;

a hoist that drives the main hoist rope;

an emergency brake device provided to the lifting body; and

a governor that detects an overspeed of the lifting body and activates the emergency braking device when the overspeed is detected,

the elevator arrangement is characterized in that it is provided with,

the speed governor is provided with:

a frame;

an encoder that detects rotation of the rotating body,

the governor detects the overspeed of the ascending/descending body in accordance with the rotation of the rotating body,

the governor includes a support shaft that is fixed coaxially with the rotating body and is rotatably supported by the frame,

the governor includes a coupling mechanism that couples a side surface of the first bearing housing and a side surface of the first bearing,