JP2017065861A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator suppressing jumping-up of a tension weight in an emergency stop, and free from the need of a special adjustment work to change in a length of a speed governor rope.SOLUTION: An elevator which includes a speed governor which detects a speed of a car 5 from a circulation speed of a speed governor rope 9, and grips the speed governor rope 9 so as to urgently stop the car 5 includes: a pressing part 21 which is provided in a tension weight 1 and presses a guide rail 4; and a pressing force adjustment part 50 which adjusts a pressing force by which the pressing part 21 presses the guide rail 4. The pressing force adjustment part 50 strengthens a pressing force by which the pressing part 21 presses the guide rail 4 when the car 5 is urgently stopped by the speed governor, and the tension weight 1 moves in the upper direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an elevator equipped with a speed governor that makes an emergency stop of a car.

  The elevator is usually provided with a speed governor that detects an overspeed when the car is moving up and down to make the car emergency stop. The speed governor detects the overspeed of the car from the circulation speed of the speed governor rope and grips the speed governor rope to stop the car emergencyly. When the car is stopped in an emergency, there is a problem that the tension weight provided on the governor rope jumps up due to the inertial force generated when the car is stopped. In addition, the governor rope has a problem that the length changes with time.

  In order to solve such a problem, Patent Document 1 states that “the governor rope connected to the car and the governor rope are wound around, and the speed of the car is determined from the circulation speed of the governor rope. Speed governor body for detecting the speed governor rope by detecting the speed governor, a pulley body for stretching the speed governor rope provided below the governor body, and a pulley support for rotatably supporting the pulley body A speed governor for an elevator having a tension pulley for a speed governor, a movable ratchet pawl that engages with a plurality of ratchet grooves, and a biasing member that biases the ratchet pawl toward the pulley support. In the machine, the ratchet groove has an inclined portion that is inclined above the side end of the pulley support, and a horizontal portion that is below the inclined portion and extends in a direction perpendicular to the side end of the pulley support. The ratchet claw is at the tip of the claw A rigid portion including a flat surface of a side end portion of the pulley support member between the plurality of ratchet grooves, and an upper engaging portion that is inclined and a lower engaging portion provided below the upper engaging portion. A part is provided. "

Japanese Patent Laying-Open No. 2015-3772

  However, as described in Patent Document 1, in the case where the so-called ratchet mechanism is used to suppress the jumping of the tension weight at the time of emergency stop, if a load exceeding the strength of the ratchet mechanism occurs, the ratchet mechanism is damaged. There is a problem of end. Further, when the elongation or contraction of the governor rope over time exceeds the length of the horizontal portion of the ratchet groove, an adjustment operation of changing the engagement position between the ratchet pawl and the ratchet groove occurs.

  Therefore, an object of the present invention is to provide an elevator that suppresses the jumping of the tension weight at the time of an emergency stop and does not require any special adjustment work for the change in the length of the governor rope.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The elevator according to the present invention includes a plurality of means for solving the above-described problems. To give an example, a governor rope connected to the car and a governor rope are wound around the governor. A speed governor that detects the speed of the car from the circulation speed of the machine rope and grips the speed governor rope to emergency stop the car, and a lower part of the speed governor that keeps the tension of the speed governor rope constant Tension weights to be maintained, a plurality of guide rails for guiding the movement of the tension weights in the vertical direction, a pressing portion provided on the tension weights for pressing the guide rails, and a pressing force by which the pressing portions press the guide rails A pressing force adjusting unit for adjusting. In addition, the pressing force adjusting unit is achieved by increasing the pressing force that presses the guide rail of the pressing unit when the car is emergency stopped by the speed governor and the tension weight moves upward.

  According to the elevator according to the present invention, it is possible to suppress jumping of the tension weight at the time of emergency stop and to eliminate the adjustment work for the change in the length of the governor rope.

It is a figure showing the schematic structure of the elevator concerning an embodiment of the invention. It is a front view which shows the structure of the tension weight in the 1st Embodiment of this invention. It is a side view which shows the structure of the tension weight in the 1st Embodiment of this invention. It is explanatory drawing for demonstrating a motion of the spring-up prevention mechanism at the time of carrying out the emergency stop of the passenger car in the 1st Embodiment of this invention. It is explanatory drawing for demonstrating a motion of the spring-up prevention mechanism when the governor rope is extended in the 1st Embodiment of this invention. It is a front view which shows the structure of the tension weight in the 2nd Embodiment of this invention. It is a side view which shows the structure of the tension weight in the 2nd Embodiment of this invention. It is explanatory drawing for demonstrating the motion of the spring-up prevention mechanism at the time of carrying out the emergency stop of the car in the 2nd Embodiment of this invention. It is explanatory drawing for demonstrating the motion of the spring-up prevention mechanism when the governor rope in the 2nd Embodiment of this invention extends.

  Hereinafter, an example of an elevator according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following examples.

<< First Embodiment >>
FIG. 1 shows a schematic configuration of an elevator 100 according to the first embodiment of the present invention.
As shown in FIG. 1, a main rope 11 is wound around a sheave and a pulley 13 of a hoisting machine 12 in a machine room 10 provided in an upper part of an elevator 100. One end of the main rope 11 is connected to the upper part of the car 15 in the hoistway 14, and the other end of the main rope 11 is connected to the upper part of the counterweight 16 in the hoistway 14. The lower part of the car 15 and the lower part of the counterweight 16 are connected by a counter rope 8 wound around a counter pulley 17 provided at the lower part of the hoistway 14. When the hoisting machine 12 in the machine room 10 frictionally drives the main rope 11, the car 15 moves up and down in the hoistway 14.

  A governor rope 9 is also connected to the car 15. The governor rope 9 is wound around the governor 7 in the machine room 10 and the tension weight 1 provided at the lower part of the hoistway 14. The speed governor 7 detects the speed of the car 15 from the circulation speed of the speed governor rope 9, and when the overspeed is detected, grips the speed governor rope 9, thereby preventing an emergency stop device (not shown). It operates to play an emergency stop of the car 15. The tension weight 1 plays the role of applying a certain tension to the governor rope 9 and stretching it.

2 is a front view showing the configuration of the tension weight 1 shown in FIG. 1, and FIG. 3 is a side view showing the configuration of the tension weight 1 shown in FIG.
As shown in FIG. 2, the tension weight 1 includes a pulley body 2 around which the governor rope 9 is wound, and a flat pulley support body 3 that rotatably supports the pulley body 2. The pulley support 3 is made of a highly rigid metal having a constant weight. The pulley support 3 is guided from both sides by two guide rails 4 extending in the vertical (up and down) direction. The pulley support 3 is movable along the guide rail 4 by engaging guide shoes 5 provided on both sides of the pulley support 3 with the guide rail 4.

  Below the pulley support 3, a jump-up prevention mechanism 50 is provided for preventing the tension weight 1 from jumping up when the car 15 is brought to an emergency stop. The jumping prevention mechanism 50 as a pressing force adjusting unit includes a link mechanism unit 18 configured to be rotatable toward the guide rail 4 side, and a pressing mechanism configured to be movable in a direction perpendicular to the guide rail 4. Part 27.

  The link mechanism portion 18 as a moving mechanism approaches and separates from the guide rail 4 and the plate-like fixed arm portion 19 extending in the horizontal direction from the lower end portion of the pulley support 3. And a plate-like moving arm portion 20 that moves. An upper end of the fixed arm portion 19 is fixed to the pulley support 3, and a lower end portion of the fixed arm portion 19 is connected to the moving arm portion 20. One end portion of the moving arm portion 20 is rotatably connected to the fixed arm portion 19 by a bolt or the like, and the other end portion of the moving arm portion 20 arranged on the guide rail 4 side is pressed to be described later. It is fixed to the pressing part 21 of the mechanism part 27. Further, as shown in FIG. 3, the link mechanism portion 18 ′ having the same configuration is provided at a position facing the pressing portion 21. Further, the link mechanism portion 18 is provided for each of the left and right guide rails 4, and is disposed at a symmetrical position at the lower end portion of the pulley support 3.

  The pressing mechanism portion 27 includes a pressing portion 21 that generates a frictional force by pressing the guide rail 4, a link base 22 formed in a square column shape arranged in a direction perpendicular to the guide rail 4, and one end of the pressing mechanism portion 27. The bar-shaped connecting part 40 fixed to the pressing part 21 and held in a state where the other end is inserted into the link base 22, and the pressing part 21 disposed between the pressing part 21 and the link base 22 are connected to the guide rail 4. And a pressing spring 41 that presses in the direction. The connecting portion 40 is held so as to be movable with respect to the link base 22. The pressing portion 21 is engaged with the guide rail 4 in the same manner as the guide shoe 5 and is made of a rubber having a high rigidity. The tension weight 1 is guided by the guide rail 4 in a state where an appropriate frictional force is generated between the pressing portion 21 and the guide rail 4 by pressing the pressing portion 21 with the pressing spring 41. The pressing portions 21 are provided for the left and right guide rails 4, respectively, and are arranged at symmetrical positions on the link base 22. As shown in FIG. 3, the moving arm portion 20 of the link mechanism portion 18, 18 ′ is fixed to the side surface of the pressing portion 21.

  At the center of the lower end portion of the pulley support 3, a stopper mechanism 24 that restricts the distance that the tension weight 1 moves by engaging with the link base 22 is provided. The stopper mechanism 24 as a restricting portion includes a rod-shaped stopper main body 43 extending in a direction horizontal to the guide rail 4 and a stopper flange portion 44 formed in a disk shape. An upper end portion of the stopper main body 43 is fixed to the pulley support 3, and a stopper flange portion 44 is provided at the lower end portion of the stopper main body 43. The stopper main body 43 is fixed to the pulley support 3 in a state where the stopper main body 43 is inserted into a penetrating portion that penetrates the link base 22 formed in the link base 22 in the vertical direction. A biasing spring 25 that biases the link base 22 upward is provided between the link base 22 and the stopper flange 44. By urging the link base 22 upward by the urging spring 25, the link base 22 can be arranged at a position slightly away from the stopper flange 44. In this way, by adjusting the distance between the stopper flange 44 and the link base 22, the force with which the pressing portion 21 presses the guide rail 4 can be regulated and adjusted.

[Emergency stop]
Next, the function of the jumping prevention mechanism 50 when the car 15 is brought to an emergency stop will be described with reference to FIG.
FIG. 4 is an explanatory diagram for explaining the movement of the jump-up prevention mechanism 50 when the car 15 is brought to an emergency stop. FIG. 4A shows a state immediately before the car 15 is emergency stopped, and FIG. 4B shows a state after the car 15 is emergency stopped. In addition, the arrow in a figure shows the moving direction of each member.
When the elevator car 15 is emergency stopped by the governor 7 due to the occurrence of some event, the tension weight 1 is shown together with the pulley body 2 by the inertial force generated at the time of stoppage as shown in FIG. 4A. A pulling force is generated in the direction of the arrow (upward).

  Next, as shown in FIG. 4B, when a force for pulling up the tension weight 1 is generated, the pulley support 3 is moved upward. When the pulley support 3 moves upward, the fixed arm 19 fixed to the lower end of the pulley support 3 also moves upward, and the position of the lower end of the fixed arm 19 moves upward. In conjunction with the movement of the lower end portion of the fixed arm portion 19 in the upward direction, the moving arm portion 20 connected to the lower end portion of the fixed arm portion 19 rotates in the direction of the arrow S1 in the figure.

The rotation of the moving arm 20 will be described in more detail. Since the pressing portion 21 is pressed toward the guide rail 4 by the pressing spring 41, a certain amount of friction is always provided between the pressing portion 21 and the guide rail 4. There is power. For this reason, when the tension weight 1 is pulled upward during an emergency stop, the distance that the connecting end of the movable arm 20 and the fixed arm 19 moves upward, and the pressing portion of the movable arm 20 There is a difference between the distance at which the connecting end portion to 21 moves upward. Due to this difference in moving distance, the link mechanism functions between the fixed arm portion 19 and the moving arm portion 20, and the moving arm portion 20 rotates in the direction of S1 in the figure.

As described above, when the moving arm unit 20 rotates in the direction indicated by S1, the tip of the moving arm unit 20 fixed to the pressing unit 21 approaches the guide rail 4 as indicated by the arrow S2 in the figure. Move to. When the distal end portion of the moving arm portion 20 approaches the guide rail 4, the force that the pressing portion 21 fixed to the distal end of the moving arm portion 20 presses the guide rail 4 increases. When the force with which the pressing portion 21 presses the guide rail 4 is increased, a strong frictional force acting downward is generated between the pressing portion 21 and the guide rail 4, and the pulley support 3 (tension weight 1) stops rising. To do.

  Here, when the inertia force generated at the time of emergency stop is very large, the distance that the tension weight 1 moves upward is increased, and the distance that the moving arm unit 20 rotates, that is, the moving arm unit 20 and the fixed arm unit. There arises a problem that the angle (rotation angle θ) with respect to 19 becomes too large. If the rotation angle θ of the moving arm part 20 becomes too large, a large load is applied to the fixing part between the moving arm part 20 and the pressing part 21, and the connection between the moving arm part 20 and the pressing part 21 may be disconnected. is there. For this reason, in this embodiment, the tension mechanism 1 is provided with the stopper mechanism 24 as described above. When a large inertia force is generated at the time of an emergency stop, when the tension weight 1 moves upward, the stopper flange portion 44 of the stopper mechanism 24 comes into contact with the link base 22 and is locked, and the rise of the tension weight 1 is stopped. Thereby, since the rotation of the moving arm unit 20 is also stopped, it is possible to prevent the moving arm unit 20 from rotating more than necessary.

  In the present embodiment, the distance between the stopper collar 44 and the link base 22 is set by the biasing spring 25 disposed between the stopper collar 44 and the link base 22, and the rotation of the moving arm section 20 is performed. Although the range of the moving angle θ is set, the range of the rotation angle θ of the moving arm unit 20 may be defined by the length of the moving arm unit 20. That is, the range of the rotation angle θ of the moving arm unit 20 is reduced by increasing the length of the moving arm unit 20, and the rotation angle of the moving arm unit 20 is shortened by shortening the length of the moving arm unit 20. The range of θ can be increased.

  Further, by adjusting the spring constant of the urging spring 25 and the length of the urging spring 25, the distance between the stopper flange 44 and the link base 22 is adjusted, and the rotation angle θ of the moving arm unit 20 is set. can do.

[Normal time]
Next, the function of the spring-up preventing mechanism 50 when the governor rope 9 is extended with time will be described with reference to FIG.
FIG. 5 is an explanatory diagram for explaining the movement of the spring-up preventing mechanism 50 when the governor rope 9 is extended. FIG. 5A shows a state before the governor rope 9 is extended, and FIG. 5B shows a state after the governor rope 9 is extended. In addition, the arrow in a figure shows the moving direction of each member.
When the governor rope 9 is stretched over time, as shown in FIG. 5A, a force to pull down the tension weight 1 together with the pulley body 2 in the direction of the arrow (downward) in the figure is generated by the weight of the tension weight 1 To do.

  When a force for pulling down the tension weight 1 is generated, the pulley support 3 moves downward as shown in FIG. 5B. When the pulley support 3 is moved downward, the fixed arm portion 19 fixed to the lower end portion of the pulley support 3 is also moved downward, and the position of the lower end portion of the fixed arm portion 19 is moved downward. In conjunction with the downward movement of the position of the lower end portion of the fixed arm portion 19, the moving arm portion 20 connected to the lower end portion of the fixed arm portion 19 rotates in the direction of the arrow S3 in the figure.

  The rotation of the moving arm 20 will be described in more detail. Since the pressing portion 21 is pressed toward the guide rail 4 by the pressing spring 41, a certain amount of friction is always provided between the pressing portion 21 and the guide rail 4. There is power. For this reason, when the governor rope 9 is extended and the tension weight 1 is pulled downward, the distance that the connecting end of the moving arm 20 and the fixed arm 19 moves downward, and the moving arm A difference occurs between the distance at which the connecting end portion of the portion 20 and the pressing portion 21 moves downward. Due to this difference in moving distance, the link mechanism functions between the fixed arm portion 19 and the moving arm portion 20, and the moving arm portion 20 rotates in the direction of S3 in the figure.

  As described above, when the moving arm portion 20 is rotated in the direction indicated by S3, the distal end portion of the moving arm portion 20 fixed to the pressing portion 21 is away from the guide rail 4 as indicated by an arrow S4 in the figure. The force which presses the guide rail 4 of the press part 21 currently fixed to the front-end | tip of the movement arm part 20 becomes weak. When the force with which the pressing portion 21 presses the guide rail 4 is weakened, the frictional force acting between the pressing portion 21 and the guide rail 4 is weakened. Therefore, the tension weight 1 is increased according to the elongation of the governor rope 9. It can move downward along the guide rail 4. When the moving arm unit 20 moves in the direction indicated by S <b> 4, a force larger than the force by which the pressing spring 41 presses the pressing unit 21 is generated at the distal end portion of the moving arm unit 20.

  Note that, as described above, in the present embodiment, a constant frictional force is always generated between the pressing portion 21 and the guide rail 4 by the urging force of the pressing spring 41. Therefore, after the tension weight 1 is moved to an appropriate position, the tension weight 1 is held by the guide rail 4 again with a certain frictional force generated by the urging force of the pressing spring 41.

On the other hand, the governor rope 9 may shrink over time due to water absorption during high humidity. In this case, a force for pulling up the tension weight 1 together with the pulley body 2 is generated as in the case of an emergency stop. However, since the force that pulls up the tension weight 1 is not a large force that occurs instantaneously as in an emergency stop, the position of the tension weight 1 gradually moves upward.
The function of the splash prevention mechanism 50 in this case will be described with reference to FIG.

  As shown in FIG. 4, a stopper mechanism 24 is provided on the pulley support 3 of the tension weight 1. Further, between the stopper collar 44 of the stopper mechanism 24 and the link base 22 of the pressing mechanism 27, the link base 22 is urged upward, and a constant frictional force is applied between the pressing part 21 and the guide rail 4. A biasing spring 25 is provided for generating.

  Since the urging spring 25 urges the link base 22 upward with a predetermined urging force, unless the inertia force larger than the urging force of the urging spring 25 is generated, the stopper collar 44 and the link base 22 There is no change in the distance. Therefore, when the governor rope 9 contracts with time and the position of the tension weight 1 gradually moves upward, an inertia force larger than the urging force of the urging spring 25 is not generated. The distance between the portion 44 and the link base 22 does not change. That is, since the moving arm portion 20 of the link mechanism 18 does not rotate, the pressing force with which the pressing portion 21 presses the guide rail 4 is kept constant, and the friction force generated between the pressing portion 21 and the guide rail 4 is also maintained. No change will occur. Thus, since the frictional force does not change, the relative positional relationship between the link mechanism 18 and the pressing mechanism 27 does not change. Accordingly, as the tension weight 1 moves upward, the splash prevention mechanism 50 also moves upward. Thus, according to the elevator of this embodiment, even when the governor rope 9 is contracted over time, the tension of the governor rope 9 is kept constant without requiring any special adjustment work. In this state, the tension weight 1 can be moved.

  As described above, according to the elevator of the present embodiment, it is possible to prevent the tension weight 1 from jumping up during an emergency stop. In addition, the tension weight 1 is moved in a state where the tension of the governor rope 9 is kept constant without requiring any special adjustment work for the expansion or contraction of the governor rope 9 that occurs over time. Can be made.

<< Second Embodiment >>
Next, an elevator according to a second embodiment of the present invention will be described. The elevator of the present embodiment is different from the first embodiment in the configuration of a jump-up preventing mechanism 51 as a pressing force adjusting unit. FIG. 6 is a front view showing the configuration of the tension weight 1 ′ of the present embodiment, and FIG. 7 is a side view showing the configuration of the tension weight 1 ′ of the present embodiment. Since the entire configuration of the elevator according to this embodiment is the same as that of the first embodiment, the description thereof will be omitted. Also, in FIGS. 6 and 7, portions corresponding to FIGS. 2 and 3 are denoted by the same reference numerals. Duplicate explanation is omitted.

  As shown in FIG. 6, a lowering prevention mechanism 51 for preventing the tension weight 1 ′ from jumping up when the car 15 is brought to an emergency stop is provided below the pulley support 3. The spring-up preventing mechanism 51 includes a link mechanism unit 28 configured to be rotatable toward the guide rail 4 side, and a pressing mechanism unit 37 configured to be movable in a direction perpendicular to the guide rail 4. Has been.

  The link mechanism portion 28 as a moving mechanism is a plate-like first arm portion 33 that moves so as to approach or separate from the guide rail 4 and a plate-like shape that can move in a direction perpendicular to the guide rail 4. Second arm portion 34. The first arm portion 33 is provided inside the pulley support 3, and the upper end of the first arm portion 33 is rotatably held at the lower portion of the pulley support 3. The lower end is connected to the second arm portion 34. One end portion of the second arm portion 34 is connected to the first arm portion 33, and the other end portion of the second arm portion 34 is fixed to a connecting portion 60 of a pressing mechanism portion 37 described later. As shown in FIG. 7, a link mechanism portion 28 ′ having the same configuration provided inside the pulley support 3 is provided so as to face the link mechanism portion 28. Further, the link mechanism portion 28 is provided for each of the left and right guide rails 4, and is disposed at a symmetrical position in the lower part of the pulley support 3.

  The pressing mechanism portion 37 includes a pressing portion 31 that generates a frictional force by pressing the guide rail 4, a pedestal link base 32 disposed in a direction perpendicular to the guide rail 4, and one end of the pressing portion 31. The rod-shaped connecting portion 60 is fixed to the second arm portion 34 with the other end portion being inserted into the link base 32, and a spring disposed between the link base 32 and the second arm portion 34. Member 48. The connecting portion 60 is held so as to be movable with respect to the link base 32. In addition, the pressing portion 31 of the present embodiment is made of a highly rigid rubber, engages with the guide rail 4, and plays the same role as the guide shoe 5. Thus, by replacing the guide shoe 5 with the pressing portion 31, the number of parts can be reduced. The pressing portions 31 are provided with respect to the left and right guide rails 4, respectively, and are disposed at positions that are symmetrical with respect to the link base 32.

  The spring member 48 urges the second arm portion 34 in a direction away from the guide rail 4 and plays a role of not generating an excessive frictional force between the pressing portion 31 and the guide rail 4. In other words, the spring member 48 plays a role of keeping the frictional force between the pressing portion 31 and the guide rail 4 at a constant value. Moreover, the link mechanism part 28 and the pressing mechanism part 37 which are arranged in the left-right symmetric position are respectively composed of the same parts, and the force with which the pressing part 31 presses the guide rail 4 can be always equalized. Thereby, it is possible to prevent the tension weight 1 ′ from being inclined by increasing only the pressing force of the one pressing portion 31.

[Emergency stop]
Next, the function of the jumping prevention mechanism 51 when the car 15 is brought to an emergency stop will be described with reference to FIG.
FIG. 8 is an explanatory diagram for explaining the movement of the jump-up prevention mechanism 51 when the car 15 is brought to an emergency stop. FIG. 8A shows a state immediately before the car 15 is emergency stopped, and FIG. 8B shows a state after the car 15 is emergency stopped. In addition, the arrow in a figure shows the moving direction of each member.
When the elevator car 15 is emergency stopped by the governor 7 due to the occurrence of some event, the tension weight 1 is illustrated together with the pulley body 2 by the inertial force generated at the time of stoppage, as shown in FIG. 8A. A pulling force is generated in the direction of the arrow (upward).

  When a force for pulling up the tension weight 1 is generated, the pulley support 3 moves upward as shown in FIG. 8B. When the pulley support 3 is moved upward, the position of the upper end portion of the first arm portion 33 fixed to the lower portion of the pulley support 3 is moved upward. When the position of the upper end portion of the first arm portion 33 moves upward, the first arm portion 33 and the second arm portion 34 rotate in the direction of the arrow S5 in the figure with the connecting portion as a fulcrum.

  The rotation of the first arm portion 33 will be described in detail. As described above, a certain amount of frictional force is always generated between the pressing portion 31 and the guide rail 4. For this reason, when the tension weight 1 ′ is pulled upward during an emergency stop, the first arm portion 33 is oriented in the direction of S5 in the drawing with the connecting portion between the first arm portion 33 and the second arm portion 34 as a fulcrum. It will turn. When the first arm portion 33 rotates in the direction of S5, the second arm portion 34 moves in the direction of S6 in the drawing so as to approach the guide rail 4. When the second arm portion 34 moves so as to approach the guide rail 4, the force of pressing the guide rail 4 of the pressing portion 31 fixed to the second arm portion 34 via the connecting portion 60 becomes strong. When the force with which the pressing portion 31 presses the guide rail 4 is increased, a strong frictional force acting downward is generated between the pressing portion 31 and the guide rail 4, and the rise of the tension weight 1 'is stopped.

[Normal time]
Next, the function of the spring-up preventing mechanism 51 when the governor rope 9 is extended with time will be described with reference to FIG.
FIG. 9 is an explanatory diagram for explaining the movement of the spring-up preventing mechanism 51 when the governor rope 9 is extended. FIG. 9A shows a state before the governor rope 9 is extended, and FIG. 9B shows a state after the governor rope 9 is extended. In addition, the arrow in a figure shows the moving direction of each member.
As shown in FIG. 9A, when the governor rope 9 is extended over time, a force is generated to pull down the tension weight 1 ′ together with the pulley body 2 in the direction of the arrow (downward) in the figure due to gravity. To do.

  As shown in FIG. 9B, when a force for pulling down the tension weight 1 ′ is generated, the pulley support 3 moves downward. When the pulley support 3 is moved downward, the first arm portion 33 fixed to the lower portion of the pulley support 3 is also moved downward, and the position of the upper end portion of the first arm portion 33 is moved downward. . When the position of the upper end portion of the first arm portion 33 moves downward, the first arm portion 33 and the second arm portion 34 rotate in the direction of the arrow S7 in the figure with the connecting portion as a fulcrum.

  When the first arm portion 33 is rotated in the direction of S7, the second arm portion 34 is moved away from the guide rail 4 as indicated by S8 in the figure. When the second arm portion 34 moves away from the guide rail 4, the force of pressing the guide rail 4 of the pressing portion 31 fixed to the second arm portion 34 via the connecting portion 60 is weakened. When the force with which the pressing portion 31 presses the guide rail 4 is weakened, the frictional force between the pressing portion 31 and the guide rail 4 is weakened, so that the tension weight 1 ′ depends on the elongation of the governor rope 9. Can move downward.

  As described above, in the present embodiment, a constant frictional force is always generated between the pressing portion 31 and the guide rail 4 by the biasing force of the spring member 48. Therefore, after the tension weight 1 ′ has moved to an appropriate position, the tension weight 1 ′ is held by the guide rail 4 again with a certain frictional force generated by the urging force of the spring member 48.

Next, a case where the governor rope 9 contracts with time will be described.
As described above, the spring member 48 urges the second arm portion 34 in the direction away from the guide rail 4 and plays a role of keeping the frictional force between the pressing portion 31 and the guide rail 4 at a constant value. . That is, unless a force greater than the biasing force of the spring member 48 is applied, the pressing force with which the pressing portion 31 presses the guide rail 4 is kept constant, and the frictional force between the pressing portion 31 and the guide rail 4 is Always in a certain state. When the governor rope 9 contracts over time, the tension weight 1 ′ is gradually pulled upward, so that a force larger than the urging force of the spring member 48 does not act on the spring member 48. That is, with the upward movement of the tension weight 1 ′, the jumping prevention mechanism 51 moves upward while keeping the frictional force between the pressing portion 31 and the guide rail 4 in a constant state. Thus, according to the elevator of this embodiment, even when the governor rope 9 is contracted over time, the tension of the governor rope 9 is kept constant without requiring any special adjustment work. In this state, the tension weight 1 ′ can be moved.

  As described above, according to the elevator of the present embodiment, it is possible to prevent the tension weight 1 from jumping up during an emergency stop. In addition, the tension weight 1 ′ is kept in a state in which the tension of the governor rope 9 is kept constant without requiring any special adjustment work against the expansion or contraction of the governor rope 9 that occurs over time. Can be moved.

  As described above, the present invention has been described based on the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the configuration can be appropriately changed without departing from the gist thereof. Is. For example, the above-described exemplary embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1, 1 '... tension weight, 2 ... pulley main body, 3 ... pulley support body, 4 ... guide rail, 5 ... guide shoe, 7 ... speed governor, 8 ... balancing rope, 9 ... speed governor rope, 10 ... Machine room, 11 ... main rope, 12 ... hoist, 13 ... pulley, 14 ... hoistway, 15 ... car, 16 ... counterweight, 17 ... counter pulley, 18, 18 ', 28 ... link mechanism, 19 ... fixed arm part, 20 ... moving arm part, 21, 31 ... pressing part, 22, 32 ... link base, 24 ... stopper mechanism, 25 ... urging spring, 27, 37 ... pressing mechanism part, 33 ... first arm part 34 ... Second arm portion, 40, 60 ... Connecting portion, 41 ... Pressing spring member, 43 ... Stopper body, 44 ... Stopper collar, 48 ... Spring member, 50, 51 ... Splash-up prevention mechanism, 100 ... Elevator

Claims (7)

A governor rope connected to the car,
The governor rope is wound around, the governor that detects the speed of the car from the circulation speed of the governor rope, grips the governor rope, and emergency stops the car;
A tension weight provided below the governor, and maintaining a constant tension of the governor rope;
A plurality of guide rails for guiding the movement of the tension weight in the vertical direction;
A pressing portion provided on the tension weight for pressing the guide rail;
A pressing force adjusting unit that adjusts a pressing force with which the pressing unit presses the guide rail, and
The pressing force adjusting unit increases the pressing force that presses the guide rail of the pressing unit when the car is emergency stopped by the speed governor and the tension weight moves upward. The pressing force adjusting unit weakens the pressing force that presses the guide rail of the pressing unit when the governor rope extends over time and the tension weight moves downward. elevator. The pressing force adjusting unit keeps a pressing force pressing the guide rail of the pressing unit constant when the governor rope contracts with time and the tension weight moves upward. Elevator. The elevator according to claim 1, wherein the pressing force adjusting unit equalizes the pressing force of the pressing unit that presses each guide rail. The elevator according to claim 1, wherein the pressing force adjusting unit includes a moving mechanism that moves the pressing unit in a direction perpendicular to the guide rail. The elevator according to claim 1, further comprising a restricting portion that restricts a pressing force for pressing the guide rail of the pressing portion. The elevator according to claim 1, wherein the pressing portion is engaged with the guide rail to guide the movement of the tension weight.

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