阅读说明：本技术 电梯的限速器 (Speed limiter of elevator ) 是由 吉野伸幸 于 2020-12-18 设计创作，主要内容包括：本发明提供一种电梯的限速器,其能够减少固化油与开关的动作片接触的情况。限速器(10)具备绳轮(20)、飞锤(22)、开关(23)以及去除装置(24)。开关(23)具有与绳轮(20)的侧面(20a)对置的动作片(23a)。去除装置(24)是用于将固化的油从绳索及绳轮去除的装置。去除装置(24)具备：对置部(24a),其与侧面(20a)对置；对置部(24b),其与绳轮(20)的侧面(20b)对置；以及对置部(24c),其与绳索对置。(The invention provides a speed governor of an elevator, which can reduce the contact of solidified oil and an action piece of a switch. The speed governor (10) is provided with a sheave (20), a flyweight (22), a switch (23), and a removal device (24). The switch (23) has an operating piece (23a) facing the side surface (20a) of the sheave (20). The removing device (24) is a device for removing solidified oil from the rope and the rope pulley. The removal device (24) is provided with: an opposing portion (24a) that faces the side surface (20 a); an opposing portion (24b) that opposes a side surface (20b) of the sheave (20); and an opposing section (24c) that faces the rope.)

1. A speed governor for an elevator, comprising:

a rope pulley around which a rope is wound;

a flyweight that is displaced in accordance with a rotational speed of the sheave; and

a switch having an actuating piece facing a 1 st side surface of the sheave, the flyweight being in contact with the actuating piece when a rotational speed of the sheave exceeds a reference speed,

the speed limiter of the elevator is characterized in that,

the speed governor of the elevator is provided with a 1 st removing device for removing solidified oil from the rope and the sheave,

the 1 st removing device includes:

a 1 st facing part facing the 1 st side surface;

a 2 nd opposing part that opposes a 2 nd side surface of the sheave; and

a 3 rd opposed part opposed to the rope,

the 2 nd side faces a direction opposite to a direction faced by the 1 st side face.

2. The speed governor of an elevator of claim 1,

the speed governor of the elevator further comprises a frame that supports the sheave via a shaft,

the frame is provided with:

a 1 st plate portion that supports one end portion of the shaft; and

a 2 nd plate portion opposed to the 1 st plate portion and supporting the other end portion of the shaft,

the 1 st removing device is arranged on the 1 st plate part and the 2 nd plate part,

the 1 st opposing portion, the 2 nd opposing portion, and the 3 rd opposing portion are disposed between the 1 st plate portion and the 2 nd plate portion.

3. The speed governor of an elevator according to claim 2,

the 1 st removing device further includes a displacement suppressing portion that faces an end surface of the 1 st plate portion or an end surface of the 2 nd plate portion.

4. The speed governor of an elevator according to any of claims 1 through 3,

at least a part of the 1 st removing means is disposed directly below the switch.

5. The speed governor of an elevator according to any of claims 1 through 3,

the speed governor of the elevator is further provided with a 2 nd removing device for removing solidified oil from the rope,

the 1 st removing device and the 2 nd removing device are disposed so as to sandwich a portion of the rope wound around the sheave from both sides when viewed from above.

6. The speed governor of an elevator of claim 1,

the speed governor of the elevator further includes:

a frame that supports the sheave via a shaft; and

a 2 nd removing device for removing solidified oil from the rope,

the 1 st and 2 nd removing devices are provided to the frame.

7. The speed governor of an elevator of claim 6,

the frame is provided with:

a 1 st plate portion that supports one end portion of the shaft; and

a 2 nd plate portion opposed to the 1 st plate portion and supporting the other end portion of the shaft,

the 1 st removing device is arranged on the 1 st plate part and the 2 nd plate part,

the 1 st opposing portion, the 2 nd opposing portion, and the 3 rd opposing portion are disposed between the 1 st plate portion and the 2 nd plate portion,

the 2 nd removing device is disposed between the 1 st plate portion and the 2 nd plate portion.

8. The speed governor of an elevator of claim 7,

the governor of the elevator further includes a support member that supports the frame,

the frame and the 2 nd removal device are fastened together to the support member by bolts.

Technical Field

The present invention relates to a speed governor for an elevator.

Background

Patent document 1 describes a speed governor for an elevator. The speed governor described in patent document 1 includes a scraper. The scraper is disposed with its blade along one side of the sheave.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-89848

Disclosure of Invention

Problems to be solved by the invention

In a speed governor of an elevator, oil oozing from a rope sometimes migrates to a sheave and solidifies on a side surface of the sheave. When oil solidified on the side surface of the rope pulley collides with an action piece of the speed limiter switch, the car is stopped emergently. In the governor described in patent document 1, the oil solidified on the one side surface of the sheave can be scraped off by the scraper.

However, in the governor described in patent document 1, the solidified oil separated from the sheave may adhere to the rope. The solidified oil attached to the rope moves together with the rope. Therefore, when the solidified oil adhered to the rope hits the operating piece of the switch when passing through the sheave, the car is stopped emergently.

The present invention has been made to solve the above problems. The invention aims to provide a speed governor of an elevator, which can reduce the situation that solidified oil collides with an action piece of a switch.

Means for solving the problems

The speed governor for an elevator of the present invention includes: a rope pulley around which a rope is wound; a flyweight that is displaced according to the rotational speed of the sheave; a switch having an actuating piece facing the 1 st side surface of the sheave, the flyweight being in contact with the actuating piece when the rotational speed of the sheave exceeds a reference speed; and a 1 st removing device for removing the solidified oil from the rope and the sheave. The 1 st removing device includes: a 1 st facing part facing the 1 st side surface; a 2 nd opposing part opposing to the 2 nd side surface of the sheave; and a 3 rd opposed part opposed to the rope. The 2 nd side faces in a direction opposite to the direction in which the 1 st side faces.

Effects of the invention

According to the speed governor for an elevator of the present invention, the contact of the solidified oil with the operating piece of the switch can be reduced.

Drawings

Fig. 1 is a diagram schematically showing an elevator apparatus including a speed governor according to embodiment 1.

Fig. 2 is a diagram schematically showing a key part of the governor.

Fig. 3 is a view showing a section a-a of fig. 2.

Fig. 4 is a side view showing the frame.

Fig. 5 is a view showing a B-B section of fig. 2.

Fig. 6 is a view of the removing device as viewed from the direction C of fig. 5.

Fig. 7 is a view showing a D-D section of fig. 2.

Fig. 8 is a plan view showing the positional relationship of the removing device, the governor rope, and the sheave.

Description of the reference symbols

1: a car; 2: a counterweight; 3: a hoistway; 3 a: a pit; 4: a main rope; 5: a traction machine; 6: a control device; 7: a guide rail; 8: a control cable; 9: an emergency braking device; 10: a speed limiter; 11: a detection device; 12: a support member; 13: a speed limiting rope; 14: a tension wheel; 15: a connecting member; 16: a clip; 20: a sheave; 20a to 20 b: a side surface; 21: a frame; 21a to 21 c: a plate portion; 21 d: an end face; 22: flying hammers; 22 a: an action piece; 23: a switch; 23 a: an action piece; 24: a removal device; 24a to 24 c: an opposite part; 24d to 24 e: an installation part; 24 f: a displacement suppression section; 25: a removal device; 25a to 25 c: an opposite part; 26: a shaft; 26a to 26 b: an end portion; 27: a bearing; 28: a shaft; 29-31: and (4) bolts.

Detailed Description

The invention is described with reference to the accompanying drawings. Duplicate descriptions are appropriately simplified or omitted. In the drawings, the same reference numerals denote the same or equivalent parts.

Embodiment 1.

Fig. 1 is a diagram schematically showing an elevator apparatus including a speed governor 10 according to embodiment 1. The elevator device includes a car 1 and a counterweight 2. The car 1 moves up and down in the hoistway 3. The counterweight 2 moves up and down in the hoistway 3. The car 1 and the counterweight 2 are suspended from a hoistway 3 by a main rope 4. The main ropes 4 are an example of means for suspending the car 1 and the counterweight 2 in the hoistway 3. The rope winding method for suspending the car 1 and the counterweight 2 is not limited to the example shown in fig. 1.

The main ropes 4 are wound around the hoisting machine 5. The car 1 is driven by a hoisting machine 5. The control device 6 controls the hoisting machine 5. That is, the control device 6 controls the movement of the car 1. Guide rails 7 are provided in the hoistway 3. The movement of the car 1 is guided by the guide rails 7. The car 1 and the control device 6 are connected by a control cable 8. The control device 6 controls the devices provided in the car 1 via the control cable 8.

Fig. 1 shows an example in which a hoisting machine 5 and a control device 6 are installed in a pit 3a of a hoistway 3. The hoisting machine 5 and the control device 6 may be installed on the top of the hoistway 3. If a machine room is installed above the hoistway 3, the hoisting machine 5 and the control device 6 may be installed in the machine room.

The speed governor 10 is a device for forcibly stopping the movement of the car 1 when the movement speed of the car 1 exceeds a certain speed. For example, the speed governor 10 cuts off the power supply to the hoisting machine 5 and electrically stops the car 1 when the moving speed of the car 1 exceeds a specific 1 st speed. The speed governor 10 operates the emergency braking device 9 to mechanically stop the car 1 when the moving speed of the car 1 exceeds a specific 2 nd speed. The emergency brake device 9 is provided in the car 1. Further, the 2 nd speed is a speed faster than the 1 st speed.

The speed governor 10 includes, for example, a detection device 11, a support member 12, a speed limiting rope 13, a tension sheave 14, and a connecting member 15. The detection device 11 includes a sheave 20.

In the example shown in fig. 1, the detection device 11 is disposed at the top of the hoistway 3. The detection device 11 is supported by a support member 12. The support member 12 is fixed to the rail 7 using, for example, a clip 16. The speed-limiting rope 13 is wound around the sheave 20 and the tension pulley 14. The tension pulley 14 is disposed in the pit 3a of the hoistway 3. The governor rope 13 is connected to the car 1 via a connecting member 15. The speed limiting rope 13 moves along with the movement of the car 1. When the moving speed of the car 1 exceeds the 2 nd speed, the detecting device 11 performs an operation for preventing the movement of the speed limiting rope 13. When the movement of the governor rope 13 stops while the car 1 is moving, the emergency braking device 9 is operated by the connecting member 15. Thereby, the car 1 is forcibly stopped.

Fig. 2 is a diagram schematically showing a key part of the governor 10. Fig. 3 is a view showing a section a-a of fig. 2. The detection device 11 includes a frame 21, a flyweight 22, a switch 23, a removal device 24, and a removal device 25 in addition to the sheave 20. In fig. 2 and 3, a part of the mechanism for stopping the movement of the speed limiting rope 13 is not shown.

Fig. 4 is a side view showing the frame 21. The frame 21 is supported by the support member 12. In the example shown in fig. 1, the frame 21 is fixed to the support member 12 in a state of being placed on the support member 12. The frame 21 supports other elements included in the detection device 11. For example, the frame 21 supports the sheave 20 via a shaft 26 and a bearing 27. In the example shown in the present embodiment, the frame 21 is U-shaped as a whole. The frame 21 includes plate portions 21a to 21 c.

The plate portion 21c is placed on the support member 12 and fixed to the support member 12. The plate portion 21a extends upward from the edge of the plate portion 21 c. The plate portion 21b extends upward from the other edge of the plate portion 21 c. The plate portions 21a and 21b are arranged in parallel to face each other. One end portion 26a of the shaft 26 is supported by the plate portion 21 a. The other end 26b of the shaft 26 is supported by the plate portion 21 b. In fig. 2, a part of the plate portion 21a is omitted.

The governor rope 13 is wound around a groove formed on the outer peripheral surface of the sheave 20. The sheave 20 is disposed parallel to the plate portions 21a and 21 b. The sheave 20 is disposed between the plate portions 21a and 21 b. One side surface 20a of the sheave 20 faces the plate portion 21 a. The other side surface 20b of the sheave 20 faces the plate portion 21 b. Side 20b faces in a direction opposite to the direction that side 20a faces.

As described above, the speed limiting rope 13 moves along with the movement of the car 1. When the governor rope 13 moves, the sheave 20 rotates about the shaft 26. The rotation speed of the sheave 20 is determined according to the moving speed of the car 1. That is, the governor 10 has a function of forcibly stopping the movement of the car 1 when the rotational speed of the sheave 20 exceeds a specific reference speed.

The flyweight 22 is supported by the sheave 20. For example, the flyweights 22 are provided on the side surface 20a of the sheave 20 via a shaft 28 parallel to the shaft 26. The flyweight 22 is disposed to face the side surface 20 a.

The flyweight 22 includes an operation piece 22a at a distal end portion. The flyweight 22 is displaced according to the moving speed of the car 1. That is, the flyweight 22 is displaced according to the rotation speed of the sheave 20. When the sheave 20 rotates, the flyweight 22 is displaced around the shaft 28 by centrifugal force so that the tip end portion thereof extends outward.

The switch 23 is supported by the frame 21. For example, a part of the plate portion 21a protrudes upward from the upper end of the plate portion 21 b. The switch 23 is provided at the protruding portion of the plate portion 21 a. In fig. 2, a portion of the plate portion 21a where the switch 23 is provided is indicated by a two-dot chain line.

The switch 23 includes an operation piece 23 a. The operation piece 23a is disposed to protrude from the main body portion of the switch 23 toward the shaft 26. The end of the operating piece 23a faces the side surface 20a of the sheave 20. The switch 23 detects whether the moving speed of the car 1 exceeds the 1 st speed, that is, whether the rotation speed of the sheave 20 exceeds the reference speed. When the rotational speed of the sheave 20 exceeds the reference speed, the operating piece 22a of the flyweight 22 comes into contact with the operating piece 23a of the switch 23. The switch 23 detects that the rotational speed of the sheave 20 exceeds the reference speed by the contact of the operating piece 22a with the operating piece 23 a. When the switch 23 detects that the rotation speed of the sheave 20 exceeds the reference speed, the power supply to the hoisting machine 5 is cut off.

As described above, in the speed governor 10, the oil oozing out from the speed limiting rope 13 is transferred to the sheave 20. The oil oozed out to the sheave 20 reaches the side surfaces 20a and 20b of the sheave 20 along the grooves of the sheave 20. Then, the oil is solidified in the groove, the side surface 20a, and the side surface 20b of the sheave 20. Especially in winter, the oil is easily solidified. When the oil solidified on the side surface 20a contacts the operating piece 23a, the car 1 stops suddenly. Further, if the solidified oil peels off from the sheave 20 and adheres to the governor rope 13, the solidified oil adhering to the governor rope 13 may contact the operating piece 23 a. The removing means 24 and 25 are provided to prevent such a bad condition.

The removing device 24 is a device for removing the solidified oil from the sheave 20 and the governor rope 13. The removing device 24 is provided to the frame 21. Preferably, at least a portion of the removal device 24 is disposed directly below the switch 23. Fig. 5 is a view showing a B-B section of fig. 2. Fig. 6 is a view of the removing device 24 as viewed from the direction C of fig. 5. The removing device 24 includes opposing portions 24a to 24c, mounting portions 24d to 24e, and a displacement suppressing portion 24 f.

The opposed portions 24a to 24c are formed by providing concave cutouts in plate-like or block-like main body portions. The opposing portion 24a faces the side surface 20a of the sheave 20. A slight gap is formed between the facing portion 24a and the side surface 20 a. The opposing portion 24b faces the side surface 20b of the sheave 20. A slight gap is formed between the facing portion 24b and the side surface 20 b.

The opposing portion 24c faces the governor rope 13. The opposing portion 24c preferably faces a portion of the governor rope 13 wound around the sheave 20 or a portion immediately after the governor rope is separated from the sheave 20. A slight gap is formed between the facing portion 24c and the governor rope 13.

The attachment portions 24d and 24e extend downward from the main body portion where the opposing portions 24a to 24c are formed. The mounting portion 24d faces the inner surface of the plate portion 21a of the frame 21. For example, the mounting portion 24d is fixed to the plate portion 21a using a bolt 29. The attachment portion 24e faces the inner surface of the plate portion 21b of the frame 21. The mounting portion 24e is fixed to the plate portion 21b using a bolt 30. As shown in fig. 5 and 6, the removing device 24 is provided so as to be bridged between the plate portion 21a and the plate portion 21 b. The opposing portions 24a to 24c are disposed between the plate portion 21a and the plate portion 21 b.

The displacement restraint portion 24f is provided to the mounting portion 24 e. The displacement suppressing portion 24f faces the end surface 21d of the plate portion 21b on the outer side of the frame 21. The displacement restraint portion 24f preferably contacts the end surface 21 d. In the example shown in the present embodiment, the axis of the bolt 29 and the axis of the bolt 30 are arranged parallel to the axis 26. Therefore, the portions of the removing device 24 where the facing portions 24a to 24c are formed are easily displaced vertically. If the displacement inhibitor 24f is opposed to the end face 21d, the displacement of the remover 24 can be inhibited by the displacement inhibitor 24 f.

For example, consider a case where the removal device 24 is attached to an existing governor. In this case, if the removal device 24 is attached using the original hole formed in the frame 21, the axis of the bolt 29 for attachment and the axis of the bolt 30 are inevitably arranged parallel to the axis 26. If the removal device 24 is provided with the displacement suppressing portion 24f, the displacement of the removal device 24 can be suppressed without newly forming a hole for the third bolt in the frame 21. The displacement suppressing portion 24f may be provided to the mounting portion 24 d. In this case, the displacement restraint portion 24f faces the end surface of the plate portion 21a on the outside of the frame 21.

The removing device 25 is a device for removing the solidified oil from the speed limiting rope 13. The removing device 25 is provided to the frame 21. Preferably, the removing device 25 is disposed in a space formed inside the frame 21, i.e., between the plate portion 21a and the plate portion 21 b. In the example shown in the present embodiment, the removing device 25 is placed on the plate portion 21c of the frame 21, and is fastened to the support member 12 together with the plate portion 21c by the bolt 31. The removing device 25 is disposed below the removing device 24, for example. In the example shown in the present embodiment, the removing device 25 is disposed below the sheave 20.

Fig. 7 is a view showing a D-D section of fig. 2. The removing device 25 faces a portion of the governor rope 13 that is not wound around the sheave 20 from three sides. For example, the removing device 25 includes facing portions 25a to 25c facing the governor rope 13. The opposed portions 25a to 25c are formed by providing concave cutouts in plate-like or block-like main body portions.

The opposing portion 25a faces the governor rope 13 from the plate portion 21a side. The opposing portion 25b faces the governor rope 13 from the plate portion 21b side. The opposing portion 25c faces the governor rope 13 from the opposite side of the sheave 20. A slight gap is formed between each of the facing portions 25a to 25c and the governor rope 13.

The opposed portions 25a and 25b of the removing device 25 do not face the sheave 20 like the opposed portions 24a and 24b of the removing device 24. Therefore, the interval between the opposed portion 25a and the opposed portion 25b is smaller than the interval between the opposed portion 24a and the opposed portion 24 b. Further, when the car 1 moves, the governor rope 13 fluctuates. The fluctuation of the portion of the governor rope 13 facing the removal device 25 is larger than the fluctuation of the portion facing the removal device 24. Therefore, the distance between the opposing portion 25a and the governor rope 13 is larger than the distance between the opposing portion 24a and the side surface 20a of the sheave 20. The spacing between the opposing portion 25b and the governor rope 13 is larger than the spacing between the opposing portion 24b and the side surface 20b of the sheave 20. The spacing between the opposing portion 25c and the speed limiting rope 13 is larger than the spacing between the opposing portion 24c and the speed limiting rope 13.

Fig. 8 is a plan view showing the positional relationship of the removing devices 24 and 25, the governor rope 13, and the sheave 20. As shown in fig. 8, the removing device 24 and the removing device 25 are disposed so as to sandwich a portion of the governor rope 13 wound around the sheave 20 from both sides when viewed from above.

According to the example shown in the present embodiment, the oil solidified on the side surface 20a of the sheave 20 can be removed by the facing portion 24a of the removing device 24. Similarly, the oil solidified on the side surface 20b of the sheave 20 can be removed by the facing portion 24b of the removing device 24. Even if the solidified oil separated from the sheave 20 adheres to the speed limiting rope 13, the solidified oil adhering to the speed limiting rope 13 is removed by the facing portion 24c of the removing device 24. Therefore, the oil seeping from the speed limiting rope 13 can be prevented from solidifying and then contacting the operating piece 23a of the switch 23.

In the example shown in the present embodiment, the removal device 25 is provided. In the example shown in the present embodiment, when the car 1 ascends, the speed limiting rope 13 passes through the recess of the removing device 24, passes near the operating piece 23a, and then passes through the recess of the removing device 25. When the car 1 descends, the governor rope 13 passes through the recess of the removing device 25, passes near the operating piece 23a, and then passes through the recess of the removing device 24. That is, the governor rope 13 passes through the concave portion of the removing device 24 and the concave portion of the removing device 25 before and after passing near the operating piece 23 a. According to the example shown in the present embodiment, the solidified oil adhering to the speed limiting rope 13 can be removed from the speed limiting rope 13 before the solidified oil passes through the vicinity of the actuating piece 23 a. Therefore, the contact of the solidified oil with the operation piece 23a can be further reduced.