JP7227120B2 - Elevator governor - Google Patents

Description

The present invention relates to an elevator governor that monitors the speed of a car as an elevator security mechanism.

Conventionally, elevator speed governors have been installed in general elevators to stop the car by activating the emergency brake provided in the car as a safety mechanism in the event that the speed of the car exceeds the specified speed. is provided.

The structure of the elevator governor includes, for example, a governor rope that circulates with the elevator car as it moves up and down in addition to the main rope, an operating lever that connects the governor rope and an emergency brake, and a shoe that can be braked by gripping the governor rope. Mechanisms and are widely known. In the elevator governor constructed in this way, when the overspeed condition of the car is detected, the governor rope is gripped by the shoe mechanism and braked. can be activated.

However, if the governor rope is gripped at an excessive speed, the gripped portion of the governor rope is rapidly decelerated, and a sudden tension change (tension difference) occurs on both sides of the governor rope that is hung on the governor pulley, causing the rope to be fed into the governor pulley. The governor rope may jump up on the circumference of the governor pulley and fall off. Therefore, various ideas have been devised to prevent the governor rope from jumping up when the governor rope is gripped.

For example, in Patent Document 1, ``A cover provided so as to cover at least the upper part and the side part of a sheave around which a main traction rope for suspending an elevator car and a counterweight is wound can be divided in the circumferential direction. , inside this cover, a plurality of detents extending in a direction intersecting the main tow rope are attached so as to be movable in a direction toward and away from the main tow rope. there is

Further, for example, Patent Document 2 describes "a conventional first rope catch device that restrains the governor rope on the descending side when the descending speed of the car or the counterweight becomes excessive, and further restrains the governor rope on the ascending side. A governor system for an elevator is disclosed, which includes a second rope catching device that

JP-A-2004-035130 JP-A-7-076471

However, in the elevator hoisting device disclosed in Patent Document 1, although a stopper is provided on the governor pulley (sheave), a gap exists between the governor pulley and the stopper. , there is a risk that the governor rope may bend or become entangled due to a sudden change in tension when the governor rope is gripped.

Further, in the elevator governor device disclosed in Patent Document 2, the first and second rope catch devices simultaneously restrain both sides (upward and downward sides) of the governor rope hung on the governor pulley (sheave). As a result, it is possible to suppress a sudden change in tension when the governor rope is restrained, but there is a problem in maintenance management of the rope catch device. Specifically, as a first problem, when installing the rope catch device, it is necessary to adjust the pressure springs for the governor ropes on both sides at the same time, and this work is not easy. As a second issue, it is assumed that there will be differences in the spring force of the pressure springs on each side due to the passage of time after installation. The task is not easy.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and intends to propose an elevator governor capable of preventing the governor rope from jumping up or falling off when the governor rope is braked.

In order to solve this problem, the present invention provides an elevator speed governor for monitoring the ascending/descending speed of a car of an elevator, comprising an endless governor rope that is hung on a pulley and circulates with the ascending/descending motion of the car. Then, when the ascending/descending speed of the car reaches a predetermined overspeed, the movable shoe member moves closer to the fixed shoe member, and one side of the governor rope hooked on the pulley is connected to the movable shoe member and the fixed shoe member. a governor rope gripping portion that is sandwiched between the shoe member and the governor rope for braking; and a tensioning section for constantly applying external pressure to the elevator governor.

According to the present invention, it is possible to prevent the governor rope from jumping up or falling off when the governor rope is braked.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the elevator to which the elevator speed governor which concerns on 1st Embodiment is applied. 3 is a detailed configuration diagram of the elevator governor according to the first embodiment; FIG. It is a detailed configuration diagram of an elevator governor according to a second embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Structure of Elevator 1 and Governor 8 FIG. 1 is a schematic configuration diagram of an elevator to which an elevator governor according to the first embodiment is applied. FIG. 1 shows an elevator 1 as an example of an elevator equipped with an elevator governor 8 (hereinafter referred to as governor 8) according to a first embodiment of the present invention.

As shown in FIG. 1, an elevator 1 has a hoisting machine installed at the top of a hoistway, and a car 4 is connected to one end of a main rope 3 wound around a traction sheave 2 of the hoisting machine. A counterweight 5 is connected to the other end of the main rope 3 . The car 4 is configured to move up and down along a pair of guide rails 6 installed in the hoistway, and the counterweight 5 moves along another pair of guide rails 7 installed in the hoistway. It is configured to be vertically movable. Furthermore, a speed governor 8 is provided as a safety mechanism for preventing the car 4 from suddenly falling in an emergency such as when the main rope 3 is cut.

A speed governor (governor) 8 has a configuration in which a governor rope 11 is wound endlessly between a governor pulley 9 arranged at the upper part of the hoistway and a tension pulley 10 arranged at the lower side of the hoistway. have. Further, as shown in FIG. 1, an emergency brake 12 is arranged at the bottom of the car 4, and one end of an operating lever 13 attached to the car 4 is connected to the operating body side of the emergency brake 12 to operate. A governor rope 11 is connected to the other end of the lever 13 . Therefore, the governor rope 11 of the speed governor 8 moves up and down in synchronism with the car 4 via the operating lever 13 .

Although the details will be described later, the speed governor 8 configured as described above has a first overspeed (for example, a speed that does not exceed 1.3 times the rated speed) when the elevator speed of the car 4 exceeds the rated speed. When it is detected that the traction sheave 2 has been reached, the power to the drive device of the hoist that drives the traction sheave 2 and the power to the control device that controls the drive device are cut off. Further, when the descending speed of the car 4 reaches a second overspeed (for example, a speed not exceeding 1.4 times the rated speed), the speed governor 8 stops the movement of the governor rope 11 by gripping the governor rope 11. By stopping, the actuating lever 13 is relatively pulled up, and as a result, the emergency brake 12 is actuated to mechanically bring the car 4 to an emergency stop.

FIG. 2 is a detailed configuration diagram of the elevator governor according to the first embodiment. FIG. 2 shows an example of the detailed structure of the speed governor 8 shown in FIG. The state of the governor 8 shown in FIG. 2 is the normal state in which the car 4 is normally operated in the elevator 1, and is the state before the operation of gripping the governor rope 11 (governor rope gripping operation). state.

As shown in FIG. 2 , the governor pulley 9 is rotatably supported by a support shaft 15 fixed to the housing 14 . As described above, the governor rope 11 is connected to one end of the actuating lever 13 attached to the car 4. Therefore, when the governor rope 11 moves as the car 4 moves up and down, the governor pulley 9 is centered on the support shaft 15. to rotate.

An arm 16 that extends on both sides of the support shaft 15 and rotates together with the governor pulley 9 is provided on the outer peripheral portion of the support shaft 15 of the governor pulley 9. The pivot shafts 19 and 20 of the pendulums 17 and 18 are rotatably connected. The position of the rotating shaft 19 in the pendulum 17 is biased, and its one end 17a is heavier than the other end 17b. Similar to the pendulum 17, the position of the pivot shaft 20 in the pendulum 18 is also biased, and one end 18a of the pendulum 18 is heavier than the other end 18b.

The pendulums 17 and 18 constructed as described above rotate together with the governor pulley 9 and the arm 16 . At this time, the one ends 17a and 18a of the pendulums 17 and 18 receive centrifugal force and rotate the rotary shafts 19 and 20 so that they are separated from the support shaft 15 more than the other ends 17b and 18b.

A speed adjusting spring 21 is arranged on the side of the other end 18 b of the pendulum 18 to limit the amount of displacement of the other end 18 b toward the support shaft 15 . This speed adjusting spring 21 is arranged between the arm portion 16 a of the arm 16 and the other end portion 18 b of the pendulum 18 . Therefore, when the centrifugal force acting on the pendulums 17 and 18 exceeds the resistance force of the speed adjustment spring 21, the speed adjustment spring 21 is elastically deformed, and the pendulums 17 and 18 are connected to the arm 16 to rotate. It rotates around the shafts 19 and 20 .

A claw portion 18c is formed at the other end portion 18b of the pendulum 18 so as to protrude in a direction facing the rotating shaft 20 of the pendulum 18 . The pawl portion 18c rotates the ratchet 22 when the pendulums 17 and 18 are rotated about the rotation shafts 19 and 20 by centrifugal force and the other end portion 18b of the pendulum 18 is displaced in a direction to approach the support shaft 15. It engages with tooth 22a. In addition, detection contact portions 17d and 18d having a shape projecting outward are formed at one ends 17a and 18a of the pendulums 17 and 18, respectively. The detection contact portions 17d and 18d are members that contact the overspeed switch 23 when the pendulums 17 and 18 rotate more than a predetermined amount.

Ratchet 22 is rotatably supported on support shaft 15 . The ratchet 22 is formed in a substantially disc shape, and one plane faces the pendulums 17 and 18 . A plurality of teeth 22 a are discretely formed on the outer peripheral surface of the ratchet 22 . When the pendulum 18 rotates and the one end portion 18a spreads outward due to centrifugal force, the other end portion 18b moves inward and the claw portion 18c engages with the tooth portion 22a. The shoe mechanism 24 operates during this engagement. A ratchet pin 22b is provided on the side surface of the ratchet 22 to engage with an arm portion 25a of a hook 25, which will be described later.

The shoe mechanism 24 includes a hook 25, a backing plate 26, a catch weight 27, a grip spring 28, a catch weight receiver 29, and the like. Among them, the backing plate 26 and the catch weight 27 are collectively referred to as a governor rope gripping portion as a member capable of gripping the governor rope 11 . In the speed governor 8 according to the present embodiment, the governor rope gripping portion grips one side (gripping side 11a) of the governor rope 11 hung on the governor pulley 9 . The side of the governor rope 11 that is not gripped by the governor rope gripping portion, that is, the side opposite to the gripped side 11a is called a non-gripped side 11b.

The hook 25 is rotatably supported with respect to the housing 14 by a rotating shaft 30 , and one end of the hook 25 forms an arm 25 a extending in the direction of the ratchet 22 . Another end of the hook 25 is formed with a hook portion 25b that can be engaged with a catch weight pin 27a, which will be described later.

The backing plate 26 is a fixed shoe member that sandwiches the governor rope 11 between itself and the movable shoe member (catch weight 27) at the governor rope gripping portion when the movable shoe member (catch weight 27) operates. The backing plate 26 is fixed to the housing 14 (more specifically, the governor base 31) and faces the governor rope 11 from one side (the left side of the governor rope 11 in FIG. 2). A catch weight 27 is arranged on the other side (the right side in FIG. 2) of the governor rope 11 .

The catch weight 27 is a weight corresponding to the movable shoe member in the governor rope gripping portion. The governor rope 11 is gripped (sandwiched) between them. One end of the catch weight 27 on the side of the grip spring 28 is attached to a rotating shaft, so that the other end (free end) on the side of the backing plate 26 is rotatable. Also, the catch weight 27 is biased toward the backing plate 26 by a grip spring 28 . The catch weight 27 is provided with a catch weight pin 27a that can be engaged with the hook portion 25b of the hook 25. When this engagement state is released, the free end side of the catch weight 27 is rotated by its own weight. , the free end of the catch weight 27 approaches the backing plate 26 side and grips the governor rope 11. - 特許庁

The gripping spring 28 is an elastic body (for example, a coil spring) compressed between the spring seat 32 and a fixed plate 33 fixed to the housing 14 (governor base 31). That is, the gripping spring 28 , which is a compression spring, urges the catch weight 27 toward the backing plate 26 via the spring seat 32 . However, the catch weight 27 is fixed at the position shown in FIG. 2 while the catch weight pin 27a is held in the support lock state in which the hook portion 25b of the hook 25 is engaged.

The catch weight receiver 29 is a member that receives the catch weight 27 that has dropped and gripped the governor rope 11 during the governor rope gripping operation. It is arranged on the governor base 31 .

The tension applying portion 34 is a member for applying tension to the governor rope 11 on the non-gripping side 11b. The tension applying section 34 includes a pulley 35, an arm 36, a spring mechanism 37, a screw mechanism 38, and the like, and is fixed to the governor base 31 by bolts 39, for example. The governor base 31 is a part of the housing 14 (or may be a separate member fixed to the housing 14), on which the backing plate 26, the catch weight receiver 29, and the fixing plate 33 are fixed.

As shown in FIG. 2, the tension applying portion 34 is arranged to horizontally press the pulley 35 from the side surface of the governor rope 11 before the governor rope 11 is fed into the governor pulley 9 (that is, the non-gripping side 11b of the governor rope 11). As a result, an external pressure is always applied to the governor rope 11, and the tension in the governor rope 11 is strengthened by this external pressure. Since the pulley 35 pressed against the non-gripping side 11b rotates in accordance with the movement of the governor rope 11, it does not interfere with the up-and-down movement of the governor rope 11.

In the tension applying section 34 , the arm 36 supporting the pulley 35 is connected to the screw mechanism 38 via the spring mechanism 37 . In addition to supporting the governor rope 11 , the external pressure applied to the governor rope 11 (tension applied to the governor rope 11 ) can be adjusted by a screw mechanism 38 .

More specifically, the spring mechanism 37 has an elastic body (for example, a coil spring) compressible in the direction of pressing the pulley 35 against the governor rope 11, that is, in the horizontal direction. Although FIG. 2 shows a coil spring as an example of the elastic body of the spring mechanism 37, the present embodiment is not limited to this, and an elastic body such as a leaf spring or a damper may be used. . The screw mechanism 38 has a structure in which the degree of compression of the elastic body of the spring mechanism 37 can be adjusted by turning an adjustment screw, for example, so that the pulley 35 exerts an external pressure on the governor rope 11 via the arm 36 (the pressure applied to the governor rope 11 is applied tension) can be adjusted. A suitable external pressure to be applied to the governor rope 11 by the tension applying section 34 varies depending on the running standard of the elevator 1, the material of the governor rope 11, etc., and cannot be determined unconditionally. Therefore, the screw mechanism 38 is adjusted (specifically, the elastic body of the spring mechanism is compressed) so that the tension applying portion 34 applies a stronger external pressure, and the tension in the governor rope 11 is increased. It is preferable to keep

The screw mechanism 38 has a structure in which the tension applied to the governor rope 11 can be adjusted even after the tension applying portion 34 is attached to the governor base 31 by providing an adjusting screw at a position that can be operated from the outside of the speed governor 8. Preferably. Further, this embodiment is not limited to the screw mechanism 38 using screws, and any mechanism that can directly or indirectly adjust the horizontal external pressure applied to the governor rope 11 by the pulley 35 may be used.

The tension applying portion 34 shown in FIG. 2 has its lower portion fixed to the L-shaped fixing member 40 by the bolt 39, and the fixing member 40 is fixed to the side portion of the governor base 31 by the bolt 39. , and is installed on the upper side of the governor base 31, but the method of fixing the tension applying portion 34 to the governor base 31 is not limited to this. For example, the tension applying portion 34 may be directly fixed to the top or side portion of the governor base 31 without the fixing member 40 interposed therebetween. In any case, the tension applying section 34 of this embodiment can be treated as a device that can be attached to an existing speed governor by having a structure that can be installed on the governor base 31 (or the housing 14) from the outside. can be done.

(1-2) Operation of Speed Governor 8 The operation of the speed governor 8 according to the first embodiment will be described in detail below.

The operation of the speed governor 8 configured as described above is "normal operation" in the case where the elevator car 4 ascending/descending speed reaches the first overspeed, and when the ascending/descending speed of the elevator car 4 exceeds the rated speed, the It can be roughly divided into a "power cutoff operation" when detecting that the first overspeed has been reached, and a "governor rope gripping operation" when detecting that the ascending/descending speed of the car 4 has reached the second overspeed. can.

First, normal operation will be described. For example, when the car 4 descends at the rated speed, the governor rope 11 moves in the same direction together with the car 4, causing the governor pulley 9 to rotate. In FIG. 2, arrows indicate the moving direction of the governor rope 11 when the car 4 descends. The rotation of the governor pulley 9 causes centrifugal force to act on the pendulums 17 and 18. When the centrifugal force exceeds the resistance force of the speed adjusting spring 21, the pendulums 17 and 18 rotate about the rotating shafts 19 and 20. do. In normal operation, the ratchet 22 does not rotate, and the arm portion 25a and the ratchet pin 22b, and the hook portion 25b and the catch weight pin 27a are kept engaged. Therefore, the free end of the catch weight 27 is held in a predetermined inclined state without touching the governor rope 11 (support locked state).

Next, the power shutdown operation will be described. For example, when the descending speed of the car 4 reaches the first overspeed for some reason, the detection contact portion 17d of the pendulum 17 (or the detection contact portion 18d of the pendulum 18) contacts the overspeed switch 23. . As a result, the speed governor 8 detects that the ascending/descending speed of the car 4 has reached the first overspeed, and turns off the power of the driving device that drives the traction sheave 2 and the power of the control device that controls the driving device. shut off each. In the power-off operation, the ratchet 22 does not rotate, the arm portion 25a and the ratchet pin 22b, and the hook portion 25b and the catch weight pin 27a are respectively held in the engaged state, and the catch weight 27 is held in the same manner as in the normal operation. is maintained in the support lock state.

Next, the governor rope gripping operation will be described in detail.

Before the governor rope gripping operation is started, the state of the speed governor 8 is the same as in the normal operation or power-off operation described above. That is, as shown in FIG. 2, the ratchet 22 is not rotated, and the arm portion 25a and ratchet pin 22b, and the hook portion 25b and catch weight pin 27a are kept engaged. Therefore, the free end of the catch weight 27 is supported with a predetermined inclination without touching the governor rope 11 (support locked state).

In the state shown in FIG. 2, when the descending speed of the car 4 reaches the second overspeed due to, for example, the main rope 3 being cut, the pawl portion provided on the other end portion 18b of the pendulum 18 that has rotated 18c engages teeth 22a of ratchet 22 and rotates ratchet 22 counterclockwise in FIG. When the ratchet 22 rotates in this manner, the hook 25 rotates clockwise around the rotation shaft 30 via the ratchet pin 22b.

Further, as the hook 25 rotates, the engagement between the hook portion 25b and the catch weight pin 27a is released. When the support lock state is released, the catch weight 27 starts falling about the pivot shaft on the side of the spring seat 32 .

After that, when the catch weight 27 drops to a position facing the backing plate 26 , the governor rope gripping portions (the catch weight 27 and the backing plate 26 ) face each other and sandwich the governor rope 11 . At this time, since the catch weight 27 is urged toward the backing plate 26 by the elastic force of the gripping spring 28, the governor rope 11 can be clamped between the catch weight 27 and the backing plate 26 and braked. When the car 4 continues to descend after the movement of the governor rope 11 is stopped, the operating lever 13 connected to the governor rope 11 is relatively pulled up, so that the emergency brake 12 is actuated and the car 4 is mechanically stopped. emergency stop.

When the governor rope 11 is braked by the governor rope gripping operation in this way, the movement of the governor rope 11 is rapidly decelerated, and the tension on the gripping side 11a of the governor rope 11 is reduced. In the conventional speed governor, due to this sudden change in tension, the governor rope 11 on the non-gripped side 11b sent to the governor pulley 9 may jump up on the circumference from the governor pulley 9 and fall off.

However, in the speed governor 8 according to this embodiment, external pressure is always applied to the non-gripping side 11b by the tension applying portion 34 from when the catch weight 27 is in the support lock state (during normal operation and during power cutoff operation). As a result, the tension of the governor rope 11 sent to the governor pulley 9 from the non-gripped side 11b is strengthened. Decrease can be mitigated. As a result, the difference in tension between the two sides 11a and 11b of the governor rope 11 hung on the governor pulley 9 is reduced, preventing the governor rope 11 on the non-gripped side 11b from jumping up on the circumference of the governor pulley 9 or falling off due to inertial force. can be prevented.

As described above, the speed governor 8 according to the first embodiment includes the endless governor rope 11 that is hung on the governor pulley 9 and circulates as the car 4 moves up and down, and the speed of the car going up and down. reaches a predetermined overspeed (second overspeed), the movable shoe member (catch weight 27) moves closer to the fixed shoe member (backing plate 26), and the governor rope 11 hooked on the governor pulley 9 is lifted. A governor rope gripping portion (backing plate 26 and catch weight 27) for braking by sandwiching one side (gripping side 11a) between the movable shoe member and the fixed shoe member, and a non-gripping side 11b of the governor rope 11 hung on the governor pulley 9. and a tension applying portion 34 which is arranged to press against the governor rope 11 and always applies external pressure to the governor rope 11 . According to the speed governor 8 configured in this manner, tension can be applied to the governor rope 11 before it is fed to the governor pulley 9, so that the tension of the governor rope 11 from the gripping side 11a to the circumference of the governor pulley 9 can be reduced. It can be relieved, and the governor rope 11 can be prevented from jumping up or falling off.

In addition, the tension applying section 34, which is a characteristic configuration of the governor 8 according to the first embodiment, is a device that can be installed at the end of other configurations of the governor 8. Since it is structured to be attached to the non-gripped side 11b opposite to the gripped side 11a that requires adjustment by the grip portion, initial installation and adjustment are easy. Further, after installation, the external pressure applied to the governor rope 11 can be adjusted only by operating the screw mechanism 38 without removing or disassembling the tension applying portion 34, so maintenance is easy. In addition, since the tension applying section 34 has an independent device configuration, it can be easily added to a conventional elevator governor, thereby preventing the governor rope from jumping up or falling off even in a conventional elevator governor. A preventive effect can be expected.

(2) Second Embodiment Regarding the elevator governor 41 (hereinafter referred to as the governor 41) according to the second embodiment of the present invention, the elevator governor 8 according to the first embodiment is The following description will focus on the points of difference.

FIG. 3 is a detailed configuration diagram of the elevator governor according to the second embodiment. The speed governor 41 according to the second embodiment can be mounted in place of the speed governor 8 in the elevator 1 described with reference to FIG. 1 in the first embodiment. Further, when comparing the detailed configuration of the speed governor 41 shown in FIG. 3 with the detailed configuration of the speed governor 8 according to the first embodiment shown in FIG. They differ only in that they are changed. Therefore, in the following description, repetition of description of common parts will be omitted.

In the second embodiment, the tension applying portion 42 is a member for applying tension to the governor rope 11 on the non-gripping side 11b. The tension applying section 42 includes a pulley 35, an arm 36, a spring mechanism 37, an adjusting arm 43, and the like, and is fixed to the governor base 31 by bolts 39, for example.

As shown in FIG. 3, the tension applying portion 42 presses the pulley 35 substantially horizontally from the side surface of the governor rope 11 before the governor rope 11 is fed into the governor pulley 9 (that is, the non-gripped side 11b of the governor rope 11). By being arranged, an external pressure is always applied to the governor rope 11, and the tension in the governor rope 11 is strengthened by this external pressure. Since the pulley 35 pressed against the non-gripping side 11b rotates in accordance with the movement of the governor rope 11, it does not interfere with the up-and-down movement of the governor rope 11.

In the tension applying section 42 , the arm 36 supporting the pulley 35 is connected to the spring mechanism 37 , and an adjusting arm 43 capable of adjusting the mounting angle of the arm 36 is provided, so that the tension applying section 42 is attached to the governor rope 11 . The external pressure applied to the governor rope 11 (tension applied to the governor rope 11) can be adjusted by the adjustment arm 43.

The spring mechanism 37 is the same as the spring mechanism 37 of the tension applying section 34 of the first embodiment, and detailed description thereof will be omitted. The adjustment arm 43 is a member that connects between the arm 36 and a fixing member 44 for fixing the tension applying portion 42 to the governor base 31 . external pressure (tension applied to the governor rope 11) applied by the pulley 35 to the governor rope 11 can be adjusted. A suitable external pressure to be applied to the governor rope 11 by the tension applying portion 42 varies depending on the running standard of the elevator 1, the material of the governor rope 11, etc., and cannot be determined unconditionally. Therefore, the attachment angle of the adjustment arm 43 is adjusted (specifically, the arm 36 is set at an angle close to the horizontal) so that the tension applying portion 42 applies a stronger external pressure, and the governor rope 11 It is preferable to increase the tension.

In order to increase the accuracy of adjusting the external pressure by the tension applying portion 42, the adjustment arm 43 is provided with a mechanism that can fix the mounting angle step by step, a mechanism that can set the mounting angle accurately by electric control or the like. may

In the tension applying portion 42 shown in FIG. 3, the fixing member 44 is fixed to the side portion of the governor base 31 by the bolt 39, but the fixing method of the tension applying portion 42 to the governor base 31 is not limited to this. . For example, the fixing member 40 may be fixed to the top of the governor base 31 . In any case, the tension applying section 42 of this embodiment can be treated as a device that can be attached to an existing speed governor by having a structure that can be installed on the governor base 31 (or the housing 14) from the outside. can be done.

As with the speed governor 8 according to the first embodiment, the speed governor 41 including the tension applying portion 42 as described above operates normally, powers off, or The governor rope is gripped. At this time, the tension applying portion 42 constantly applies an external pressure to the non-gripped side 11b of the governor rope 11, so that the tension of the governor rope 11 fed from the non-gripped side 11b to the governor pulley 9 is maintained at increased tension. Therefore, even when the gripped side 11a is gripped by the governor rope gripping operation, the decrease in the tension of the governor rope 11 from the gripped portion to the circumference of the governor pulley 9 can be alleviated. As a result, as in the speed governor 8 according to the first embodiment, the difference in tension between the two sides 11a and 11b of the governor rope 11 hung on the governor pulley 9 is reduced, and the governor rope 11 on the non-gripped side 11b is pulled by the inertial force. Jumping up on the circumference of the governor pulley 9 or falling off can be prevented.

In addition, the tension applying section 42, which is a characteristic configuration of the speed governor 41 according to the second embodiment, is a device that can be installed at the end of the other components of the speed governor 41. Further, the governor rope Since it is structured to be attached to the non-gripped side 11b opposite to the gripped side 11a that requires adjustment by the grip portion, initial installation and adjustment are easy. After installation, the external pressure applied to the governor rope 11 can be adjusted simply by adjusting the mounting angle of the adjusting arm 43 without removing or disassembling the tension applying portion 42, so maintenance is easy. In addition, since the tension applying section 42 has an independent device configuration, it can be easily added to a conventional elevator governor, thereby preventing the governor rope from jumping up or falling off even in a conventional elevator governor. A preventive effect can be expected.

Comparing the tension applying portion 34 in the first embodiment and the tension applying portion 42 in the second embodiment, each has the following advantages. Since the tension applying portion 34 can be reliably pressed against the governor rope 11 from the horizontal direction, it can apply a more stable and relatively strong external pressure than the tension applying portion 42 . On the other hand, the tension applying section 42 can be installed in a narrower space (especially in the horizontal direction) than the tension applying section 34 because it does not have the screw mechanism 38 .

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace part of the configuration of each embodiment with another configuration.

For example, in each of the above embodiments, the elevator governors 8 and 41 have been described based on the structure of the pendulum type governor, but the elevator governor system of the present invention is not limited to this. Instead, it can be applied to, for example, a ball-type speed governor or the like.

Further, for example, in each of the above-described embodiments, the tension applying sections 34 and 42 are configured to have the spring mechanism 37 , but as a modification, the tension applying sections 34 and 42 may not have the spring mechanism 37 . In this case, although the spring mechanism 37 cannot elastically support the external pressure applied to the governor rope 11 from the tension applying portions 34, 42, the space of the tension applying portions 34, 42 can be reduced by the amount corresponding to the absence of the spring mechanism. be able to.

1 elevator 2 traction sheave 3 main rope 4 car 5 counterweight 6, 7 guide rail 8 elevator speed governor (speed governor)
9 governor pulley 10 tension pulley 11 governor rope 12 emergency brake 13 actuating lever 14 housing 15 spindle 16 arm 16a arm 17, 18 pendulum 17a, 17b, 18a, 18b end 18c claw 17d, 18d contact portion for detection 19, 20, 30 rotation shaft 21 speed adjusting spring 22 ratchet 22a tooth 22b ratchet pin 23 overspeed switch 24 shoe mechanism 25 hook 25a arm 25b hook 26 backing plate 27 catch weight 27a catch weight pin 28 grip spring 29 catch weight receiver 31 Governor base 32 Spring seat 33 Fixing plate 34 Tension applying part 35 Pulley 36 Arm 37 Spring mechanism 38 Screw mechanism 39 Bolt 40 Fixing member 41 Elevator speed governor (speed governor)
42 Tension applying part 43 Adjusting arm 44 Fixing member

Claims (4)

An elevator governor for monitoring the ascending/descending speed of an elevator car,
an endless governor rope that is hung on a pulley and that circulates as the car moves up and down;
When the ascending/descending speed of the car reaches a predetermined overspeed, the movable shoe member moves closer to the fixed shoe member, and one side of the governor rope hooked on the pulley is separated from the movable shoe member and the fixed shoe member. A governor rope gripping portion that is clamped and braked between,
a tension applying section that is arranged to press against the non-gripped side of the governor rope , which faces the one side of the governor rope hung on the pulley with the pulley interposed therebetween, and constantly applies external pressure to the governor rope;
An elevator governor comprising: The elevator governor according to claim 1, wherein the tension applying section has an elastic body that supports external pressure applied to the governor rope. The elevator governor according to claim 1, wherein the tension applying section has an adjustment mechanism capable of adjusting the external pressure applied to the governor rope. The elevator governor according to claim 1, wherein the tension applying portion is fixed to an upper portion or a side portion of a base member that fixes the stationary shoe member.

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