Elevator

Abstract

The objective of the present invention is to provide an elevator capable of detecting when a predetermined height of matter has adhered to a sheave. [Solution] The present invention is characterized by comprising a rope connected to a car that rises and falls within a hoistway, a sheave having an outer peripheral surface around which the rope is wound and which rotates in conjunction with the rise and fall of the car, and a detection unit capable of detecting when a predetermined height of matter has adhered to the outer peripheral surface.

Description

[Technical field]

[0001] The present invention relates to an elevator in which a car ascends and descends within a hoistway. [Background technology]

[0002] A sheave groove cleaning device has been known that is installed in an elevator and removes deposits (rope oil seeping out from the rope, surrounding debris, dust, etc.) that have adhered to the grooves of a sheave (such as a sheave) around which a rope is wound (see Patent Document 1).

[0003] This sheave groove cleaning device has an engagement portion that can engage with the sheave groove, and the engagement portion is covered with an elastic member. In an elevator in which this sheave groove cleaning device is installed, the engagement portion engages with the sheave groove via the elastic member, so that the elastic member elastically deforms between the engagement portion and the sheave groove and fits into the sheave groove. In this state, the sheave rotates and the elastic member slides against the sheave groove, cleaning the sheave groove. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 02-135588 Summary of the Invention [Problem to be solved by the invention]

[0005] However, even if the above-mentioned sheave groove cleaning device is installed in an elevator, there are times when the deposits attached to the sheave grooves cannot be completely removed, and if the unremovable deposits accumulate and exceed a certain height, various problems are likely to occur in the elevator.

[0006] Therefore, an object of the present invention is to provide an elevator capable of detecting when a predetermined height of adhesion has adhered to the sheave. [Means for solving the problem]

[0007] The elevator of the present invention is A rope connected to a car ascending and descending in a hoistway; a sheave having an outer circumferential surface around which the rope is wound and rotating in conjunction with the elevation and lowering of the car; and a detection unit capable of detecting when a predetermined height of adhesion has adhered to the outer peripheral surface.

[0008] According to this configuration, the detection unit can detect when a predetermined height of material has adhered to the outer peripheral surface of the sheave.

[0009] The elevator further includes a speed governor that detects speed abnormalities of the car, The sheave includes a first sheave of the governor and a second sheave for applying a predetermined tension to the rope, The rope is wound around the first sheave and the second sheave, The detection unit may detect that the attachment has adhered to the predetermined height on the outer peripheral surface of at least one of the first sheave and the second sheave.

[0010] According to this configuration, the adhesion is detected before the speed change of the rope caused by the adhesion becomes large (that is, before the adhesion becomes large enough to cause the governor to erroneously detect an abnormality in the cage speed).

[0011] In this case, specifically, the elevator includes a hoist that drives the car to ascend and descend, The speed governor electrically stops the car when the speed of the rope reaches a first speed, The specified height may be a value corresponding to the height of the attachment when the rope speed becomes a second speed that is greater than the rated speed and smaller than the first speed while the hoist is raising or lowering the cage at a rated speed.

[0012] With this configuration, it is possible to prevent the governor from erroneously detecting an abnormality in the cage speed due to adhesions.

[0013] The elevator further includes a hoist that drives the car to ascend and descend, The speed governor electrically stops the car when the speed of the rope reaches a first speed, The specified height may be a value corresponding to the height of the attachment when the maximum speed of the rope becomes a second speed smaller than the first speed when the rope speed changes to vibrate with an amplitude based on the attachment while the hoist is raising or lowering the cage at a rated speed.

[0014] With this configuration, even if the rope speed vibrates due to resonance or the like (i.e., the speed value changes so that it repeatedly increases and decreases within a predetermined range), it is possible to prevent the governor from erroneously detecting an abnormality in the cage speed due to adhesions. Effect of the Invention

[0015] As described above, according to the present invention, an elevator capable of detecting when a predetermined height of material has adhered to a sheave can be provided. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an elevator according to this embodiment. [Diagram 2] FIG. 2 is a diagram for explaining the configuration of a governor provided in the elevator. [Diagram 3] FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the vicinity of a groove in a tension sheave with a governor rope wound therearound. [Diagram 5] FIG. 5 is a schematic diagram for explaining the configuration of the first detection unit. [Figure 6] FIG. 6 is a schematic diagram showing a state in which the grooved roller climbs over an adhered object in the first detection unit. [Figure 7] FIG. 7 is a graph showing the speed oscillations of the governor rope. [Figure 8] FIG. 8 is a schematic diagram for explaining the principle by which speed vibration occurs in the governor rope. [Figure 9] FIG. 9 is a graph showing the relationship between the adhesion height of the deposit and the resonance velocity amplitude of the governor rope. [Figure 10] FIG. 10 is a diagram for explaining how to obtain values ​​necessary for deriving the resonance velocity amplitude by calculation. [Figure 11] FIG. 11 is a schematic diagram showing a sheave and a detection unit according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0018] The elevator according to this embodiment is a so-called traction elevator. As shown in Fig. 1, this elevator 1 includes a hoistway S1 extending vertically in a building or the like, a hoisting machine 2 arranged in an upper portion of the hoistway S1 or in a machine room S2 arranged above the hoistway S1 and having a main sheave 2a, a main rope 3 wound around the main sheave 2a, a car 4 connected to one end of the main rope 3 and ascending and descending in the hoistway S1, and a counterweight 5 connected to the other end of the main rope 3.

[0019] The elevator 1 also includes a lower sheave section 6 having a tension sheave 61 and arranged in the lower part of the hoistway S1, a governor (speed governor) 7 having a governor sheave 71 located above the tension sheave 61 and arranged in the upper part of the hoistway S1 or in a machine room S2 provided above the hoistway S1, and a governor rope (speed regulating rope) 8 connected to the car 4 and endlessly wound around the tension sheave 61 and the governor sheave 71. The governor 7 in this embodiment is arranged in the machine room S2.

[0020] The elevator 1 also includes a first detection unit (detection unit) 9A capable of detecting an attachment F attached to the governor sheave 71 (see FIG. 5). The elevator 1 of this embodiment also includes a second detection unit (detection unit) 9B capable of detecting an attachment attached to the tension sheave 61.

[0021] In this elevator 1, the hoist 2 rotates the main sheave 2a, causing the car 4 connected to one end of the main rope 3 to ascend and descend (run) in the hoistway S1. As the car 4 ascends and descends, the governor rope 8 runs (rotates) at the same speed as the ascending and descending speed of the car 4.

[0022] The governor 7 detects the speed (traveling speed) of the car 4 from the rotational speed of a governor sheave 71 around which a governor rope 8 is wound, and stops the car 4 when the ascent or descent speed of the car 4 exceeds a specified value. The governor 7 in this embodiment is arranged together with the hoisting machine 2 in a machine room S2 provided above the hoistway S1.

[0023] Specifically, as shown in FIG. 2, the governor 7 includes a governor sheave 71 around which the governor rope 8 is wound, a base 72 having a horizontally extending rotating shaft member 72a and supporting the governor sheave 71 in a freely rotatable state around the rotating shaft member 72a, and a rotor 72b that rotates when the rotation speed of the governor sheave 71 reaches a first specified value (overspeed value) V 1 an overspeed detection switch 73 that electrically stops the car 4 when the rotation speed of the governor sheave 71 exceeds a first specified value V 1 Larger second limit (excess speed limit) V 2 and a pendulum unit 75 that activates the rope clamping mechanism 74 when the speed exceeds the first specified value. In this embodiment, the first specified value is, for example, 1.3 times the rated speed, and the second specified value is, for example, 1.4 times the rated speed.

[0024] In the following, the extension direction of the rotating shaft member 72a is defined as the X-axis direction in a Cartesian coordinate system, the horizontal direction perpendicular to the extension direction of the rotating shaft member 72a is defined as the Y-axis direction in the Cartesian coordinate system, and the up-down direction is defined as the Z-axis direction in the Cartesian coordinate system.

[0025] 3, the governor sheave 71 has a groove (outer peripheral surface) 711 on the outer periphery, and the governor rope 8 is wound around the groove 711. The width (dimension in the X-axis direction) α1 of this groove 711 corresponds to the diameter of the governor rope 8 (more specifically, the size into which the governor rope 8 fits).

[0026] When the ascending or descending speed of the car 4 increases to a second specified value, the rope clamping mechanism 74 stops the car 4 by clamping the governor rope 8. The rope clamping mechanism 74 of the present embodiment stops the governor rope 8 by clamping it, thereby activating an emergency stop device (not shown) that is arranged in the car 4 and connected to the governor rope 8, thereby stopping the car 4 (i.e., mechanically stopping the car 4).

[0027] Specifically, the rope clamping mechanism 74 has a fixed shoe 741 fixed at a position along the governor rope 8, a head portion 743 having a movable shoe 742 capable of clamping the governor rope 8 between itself and the fixed shoe 741, and a retaining hook 744 with which the movable shoe 742 holds the head portion 743 at a position spaced apart from the fixed shoe 741. In this rope clamping mechanism 74, when the retaining hook 744 releases the head portion 743, the head portion 743 rotates and the governor rope 8 is clamped between the movable shoe 742 and the fixed shoe 741.

[0028] The overspeed detection switch 73 switches off the hoisting machine 2 and activates the braking device (brake) of the hoisting machine 2 (i.e. electrically stops the car 4).

[0029] The pendulum unit 75 detects the speed (ascending speed and descending speed) of the car 4 by utilizing centrifugal force, and activates the rope clamping mechanism 74. This pendulum unit 75 has a plurality of pendulums 751 (two in the example shown in FIG. 2) rotatably attached to the governor sheave 71, and an elastic member 752 that biases the pendulums 751.

[0030] Each of the multiple pendulums 751 is attached to the governor sheave 71 so as to be rotatable around a rotation shaft 753 extending in the X-axis direction. In each pendulum 751, a portion (first portion) 751a on one side of the rotation shaft 753 in the rotation direction of the governor sheave 71 (the direction in which the governor sheave 71 rotates when the car 4 descends: the clockwise side in FIG. 2) is different in weight from a portion (second portion) 751b on the other side. In the pendulum 751 of this embodiment, the first portion 751a is heavier than the second portion 751b. As a result, when the governor sheave 71 rotates in the direction in which the car 4 ascends or descends, centrifugal force causes each pendulum 751 to rotate around the rotation shaft 753 so that the first portion 751a faces radially outward.

[0031] In this state, when the rotational speed of the governor sheave 71 (i.e., the speed of the governor rope 8) increases and becomes 1.3 times the rated speed of the car 4, the first portion 751a moves radially outward of the governor sheave 71 due to the rotation of the pendulum 751 about the rotation shaft 753 and comes into contact with the overspeed detection switch 73. Then, when the rotational speed of the governor sheave 71 further increases and becomes 1.4 times the rated speed of the car 4, the pendulum 751 (more specifically, the first portion 751a) moves further radially outward of the governor sheave 71 and comes into contact with the retaining hook 744.

[0032] According to the governor 7 described above, the governor rope 8 causes the governor sheave 71 to rotate in sync with the travel (rising and descending) of the car 4, and the pendulum 751 spreads out around the pivot axis 753 due to centrifugal force. When the car 4 reaches 1.3 times (130%) the rated speed, the pendulum 751 abuts (collides) and operates the overspeed detection switch 73, opening the power circuit to the hoisting machine 2 (i.e., turning off the switch), and activating the braking device of the hoisting machine 2, thereby electrically stopping the car 4.

[0033] Furthermore, if the car 4 further exceeds the rated speed during ascent or descent and reaches 1.4 times (140%) the rated speed, the pendulum 751 spreads out further and abuts against (collides with) the retaining hook 744, disengaging the retaining hook 744 from the head portion 743 of the rope clamping mechanism 74 (in other words, the retaining hook 744 releases the head portion 743), which activates the rope clamping mechanism 74 to catch the governor rope 8. As a result, the governor rope 8 stops and the emergency stop device of the car 4 is activated.

[0034] The lower sheave portion 6 has a tension sheave 61 that is movable up and down and rotatable around an axis 61a extending in the X-axis direction (the same direction as the extending direction of the rotating shaft member 72a of the governor sheave 71), and a weight 62 connected to the tension sheave 61.

[0035] 4, the tension sheave 61 has a groove (outer peripheral surface) 611 on its outer periphery, and the governor rope 8 is wound along the groove 611. The width α2 of this groove 611 (the dimension in the X-axis direction) corresponds to the diameter of the governor rope 8 (more specifically, the size into which the governor rope 8 fits), and the width α2 of the groove 611 in this embodiment is the same as or approximately the same as the width α1 of the groove 711 of the governor sheave 71.

[0036] The weight of the weight 62 exerts a downward force on the tension sheave 61, thereby applying a predetermined tension to the governor rope 8 that is endlessly wound around the governor sheave 71 and the tension sheave 61.

[0037] The first detection unit 9A detects that a predetermined height of adhesion F has adhered to the outer circumferential surface (groove in this embodiment) 711 of the governor sheave 71. This first detection unit 9A detects the adhesion F when the height of the adhesion F from the bottom surface of the groove 711 (the radial dimension of the governor sheave 71) reaches a preset value (detection set value: for example, about 3 to 6 mm). The detection set value will be described in detail later. Also, in this embodiment, the adhesion F is rope oil that has oozed from the governor rope 8, surrounding debris, dust, etc., and becomes larger over time.

[0038] 5 and 6, the first detection unit 9A has a contact portion 91 that contacts the governor sheave 71, a support portion 95 that supports the contact portion 91, and a detection switch 96 that can detect movement of the contact portion 91 by a predetermined amount (a detection set value in this embodiment) or more. In addition, in Fig. 5 and Fig. 6, the part indicated by reference symbol 711a is the bottom surface 711a of the groove 711 of the governor sheave 71, and the part indicated by reference symbol F is an attachment attached to the bottom surface 711a.

[0039] The support portion 95 supports the contact portion 91 so that the contact portion 91 contacts the governor sheave 71 at a predetermined circumferential position. This predetermined position is preferably the position farthest from the governor rope 8 wound around the governor sheave 71. In the elevator 1 of this embodiment, the support portion 95 supports the contact portion 91 so that the contact portion 91 contacts the bottom surface 711a of the groove 711 at the lower end position of the governor sheave 71.

[0040] Specifically, the support portion 95 has a first portion 951 extending downward from the base portion 72 of the governor 7 (more specifically, the periphery of the rotating shaft member 72a) and a second portion 952 extending horizontally from the lower end of the first portion 951.

[0041] The contact portion 91 has a groove roller 92 that rotates with the rotation of the governor sieve 71 by contacting the bottom surface 711a of the groove 711, and a biasing portion 93 that connects the groove roller 92 and the support portion 95 (more specifically, the second portion 952) while biasing the groove roller 92 toward the bottom surface 711a of the groove 711.

[0042] The grooved roller 92 is a roller that can rotate freely around an axis 92a extending in the X-axis direction. The thickness dimension of the grooved roller 92 in the X-axis direction is smaller than the width (opening width) α1 of the groove 711 of the governor sheave 71 (see FIG. 3). As a result, the grooved roller 92 enters the groove 711, and the peripheral surface of the grooved roller 92 contacts the bottom surface 711a.

[0043] The biasing portion 93 has an expansion / contraction portion 931 that connects the second portion 952 and the groove roller 92 (more specifically, the shaft 92a) so as to be expandable and contractible in the radial direction of the governor sheave 71, and a spring portion 932 that biases the expansion / contraction portion 931 in a direction to extend the expansion / contraction portion 931 (i.e., toward the bottom surface 711a of the groove 711).

[0044] The detection switch 96 outputs a detection signal (responds as a switch) when the groove roller 92 moves away from the bottom surface 711a of the groove 711 in the radial direction of the governor sheave 71 by a detection set value or more. In the elevator 1 of this embodiment, the detection signal output from the detection switch 96 is transmitted (alert) to a center or the like that remotely monitors the elevator 1. In the example of this embodiment, the center or the like that receives this alert sends an instruction to a worker or the like to perform work to remove the deposit F.

[0045] The second detection unit 9B has the same configuration as the first detection unit 9A. That is, the second detection unit 9B has a contact portion 91, a support portion 95, and a detection switch 96. The contact portion 91 has a groove roller 92 and an urging portion 93, and the support portion 95 has a first portion 951 and a second portion 952. The position where the contact portion 91 of the second detection unit 9B contacts the tension sheave 61 (the position in the circumferential direction of the tension sheave 61) is also preferably the farthest position from the governor rope 8 wound around the tension sheave 61, and in the elevator 1 of this embodiment, the support portion 95 supports the contact portion 91 so that the contact portion 91 contacts the bottom surface 611a of the groove 611 at the upper end position of the tension sheave 61.

[0046] Next, the detection setting values ​​of the first and second detection sections 9A and 9B will be described.

[0047] This detection set value is a value when the speed (speed value) of the governor rope 8 is greater than the rated speed and the first specified value V 1 Smaller speed (alarm speed) V K This is the value corresponding to the height (adhesion height) h of the adhesion F when the warning speed (warning speed value) V K (That is, warning speed V KThe fixing height h) corresponding to may have a predetermined width.

[0048] The detection set value in this embodiment is the amplitude (speed amplitude) V based on the adhesion F when the speed V of the governor rope 8 is in a state where the hoisting machine 2 is running the car 4 at the rated speed. A When the speed of the governor rope 8 changes to oscillate at a predetermined value V (i.e., when the speed of the governor rope 8 changes to repeatedly increase and decrease within a predetermined range: see FIG. 7), the maximum speed of the governor rope 8 reaches the first specified value V 1 The smaller of the given speed (alarm speed) V K This is a value corresponding to the height (adhesion height) h of the adhesion F when

[0049] As shown in FIG. 8(A), when there is no adhesion F on each sheave (governor sheave 71, tension sheave 61), the car 4 moves at the rated speed V 0 When the car is traveling at a constant speed (rising in the example shown in FIG. 8(A)), the governor rope 8 and each sheave 71, 61 follow the car 4 at a constant speed (rated speed) V 0 to move or rotate.

[0050] On the other hand, as shown in FIG. 8B, when a deposit F is attached (adhered) to one location in the circumferential direction of the governor sheave 71, the rated speed V 0 In the initial stage of running immediately after the speed reaches the rated speed V, the governor sheave 71 is driven by inertia. 0 While rotating, when the governor rope 8 rides up on the adhesion F, the governor rope 8 is wound up in excess.

[0051] In this state, if resonance occurs due to the expansion and contraction of the governor rope 8, the speed change of the governor rope 8 due to the resonance is large, and this affects the rotation speed of the governor sheave 71. The speed V of the governor rope 8 at this time is equal to or greater than the rated speed V 0 ±V A The speed repeatedly rises and falls between these values, oscillating (see Figures 7 and 8(C)).

[0052] The velocity amplitude at this resonance (resonant velocity amplitude) V Acan be obtained based on experiments and past performance, and is proportional to the adhesion height h of the adhesion F as shown in Figure 9.

[0053] In addition, the speed amplitude of the governor rope 8 V A can also be calculated by calculation. In this calculation, the length (extra length) L of the governor rope 8 that is wound up extra at the timing when the governor rope 8 runs over the adhesion F is calculated by 0 is used, but this extra length L 0 is calculated as follows, assuming that the shape of the deposit F is triangular.

[0054] As shown in FIG. 10, when the adhesion F attached to the governor sheave 71 is viewed from the direction of the rotation axis of the governor sheave 71, the adhesion height is h and the adhesion angle is θ. When the governor rope 8 passes through the path ABC (when the adhesion F is attached), the distance L of the path ABC is 1 is expressed as follows, where the radius of the governor sheave 71 is r and sinθ≒θ. L 1 =2(r+h)sinθ=2(r+h)θ The distance L of the arc AC when the governor rope 8 passes through the path AC (when there is no attached object F) is calculated as follows. 2 teeth, L 2 =2πr×θ / 2π×2=2rθ The excess length L 0 L 1 and L 2 Since it is the difference between L 0 =L 1 -L 2 =2hθ It becomes.

[0055] The extra length L obtained in the above manner 0 The velocity amplitude V A can be sought.

[0056] Returning to FIG. 7, when vibration due to resonance occurs at a speed V of the governor rope 8 due to adhesion F adhering to the governor sheave 71, the speed amplitude V A The first prescribed value V 1 When it reaches the rated speed V 0 is the first specified value V 1 Even if the speed is smaller, the car 4 is stopped by the overspeed detection switch 73 of the governor 7 (i.e., a missed trip occurs).

[0057] So, the velocity amplitude V A is the first specified value V 1 Smaller warning speed V K When the speed amplitude V A is the warning speed V K The height h of the attached matter when this occurs is set as the detection set value of the first and second detection units 9A and 9B.

[0058] In the elevator 1 of this embodiment, for example, the warning speed V K is the rated speed V 0 The warning speed is set to about 1.1 to 1.2 times the speed of the alarm. K By setting such a value, the occurrence of mistrips can be effectively suppressed.

[0059] The above elevator 1 includes a governor rope 8 connected to the car 4 ascending and descending in the hoistway S1, sheaves 71, 61 having grooves (outer circumferential surfaces) 711, 611 around which the governor rope 8 is wound and rotating in conjunction with the ascending and descending of the car 4, and detection units 9A, 9B capable of detecting that an attachment F has adhered to the grooves 711, 611 up to a height (predetermined height) of a detection set value. This allows the detection units 9A, 9B to detect that an attachment F has adhered to the grooves 711, 611 of the sheaves 71, 61 up to a height of a detection set value. In other words, the attachment F can be detected before the speed change of the governor rope 8 caused by the attachment F becomes large (i.e., before the attachment F grows to a level that causes a false detection (miss-trip) of an abnormal speed of the car 4 in the governor 7 caused by the attachment F).

[0060] In addition, by being able to detect the adhesion F when the adhesion height (adhesion height) h reaches the detection set value, it is possible to detect the adhesion F before it grows to a size that would cause the governor rope 8 to come off the grooves 711, 611 due to the adhesion F (riding over, etc.), thereby preventing the rope from coming off the sheaves 71, 61 due to the adhesion F.

[0061] In addition, the elevator 1 of this embodiment is equipped with a governor (speed governor) 7 that detects speed abnormalities of the car 4, and the sheave includes a governor sheave (first sheave) 71 possessed by the governor 7 and a tension sheave (second sheave) 61 for applying a predetermined tension to the governor rope (rope), the governor rope 8 is wound around the governor sheave 71 and the tension sheave 61, and the detection units 9A, 9B detect that an attachment F has adhered to the grooves (outer peripheral surfaces) 711, 611 of at least one of the sheaves (sheaves) of the governor sheave 71 and the tension sheave 61 up to the height (predetermined height) of the detection setting value.

[0062] According to this configuration, the deposit F can be detected more reliably before the deposit F grows to a size large enough to cause the governor 7 to erroneously detect (miss-trip) an abnormal speed of the car 4.

[0063] The elevator 1 of this embodiment includes a hoist 2 that drives the car 4 to ascend and descend, and a governor 7 controls the speed of the governor rope 8 to a first specified value (first speed) V 1 The car 4 is electrically stopped when the car 4 reaches the rated speed V. The detection set value (predetermined height) of the detection units 9A and 9B is set to a value when the speed of the governor rope 8 reaches the rated speed V when the hoisting machine 2 is raising or lowering the car 4 at the rated speed. 0 greater than the first specified value V 1 Smaller warning speed (second speed) V K This is a value corresponding to the height h of the adhesion F when the height h of the adhesion F becomes 0.5 mm. This makes it possible to prevent the governor 7 from erroneously detecting an abnormality in the speed of the car 4 (missing a trip) caused by the adhesion F.

[0064] The elevator 1 of this embodiment includes a hoist 2 that drives the car 4 to ascend and descend, and a governor 7 controls the speed of the governor rope 8 to a first specified value (first speed) V 1 When the car 4 reaches the rated speed V 0 When the cage 4 is raised or lowered, the speed of the governor rope 8 is the resonance speed amplitude (amplitude) V based on the attachment F. A When the governor rope 8 changes to vibrate at a speed lower than the first specified value, the maximum speed of the governor rope 8 becomes a warning speed (second speed) V K This is the height h of the adhesion F when the speed of the governor rope 8 vibrates due to resonance or the like (i.e., when the speed value changes so that it repeatedly increases and decreases within a predetermined range), making it possible to reliably prevent erroneous detection (miss-trip) of an abnormal speed of the car 4 by the governor 7 caused by the adhesion F.

[0065] It should be noted that the elevator of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, or part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0066] In the elevator 1 of the above embodiment, the detection units 9A and 9B are arranged with respect to the governor sheave 71 and the tension sheave 61, but the present invention is not limited to this configuration. The detection units 9A and 9B may be arranged with respect to the main sheave 2a of the hoisting machine 2. In this case, by detecting and removing the attachment F attached to the main sheave 2a before it exceeds a predetermined height (predetermined fixing height), it is possible to suitably prevent the generation of vibrations during travel of the car 4 caused by the attachment F attached to the main sheave 2a and the rope from coming off the main sheave 2a.

[0067] Furthermore, the detection units 9A and 9B may be arranged on another sheave. That is, the sheave on which the detection units 9A and 9B are arranged may be any sheave that has an outer circumferential surface around which a rope connected to the car 4 ascending and descending (running) in the hoistway S1 is wound and rotates in conjunction with the ascending and descending of the car 4.

[0068] In addition, in the elevator 1 of the above embodiment, the detection units 9A and 9B are disposed for the governor sheave 71 and the tension sheave 61, respectively, but are not limited to this configuration. The detection units 9A and 9B may be disposed for only one of them.

[0069] Further, the specific configuration of the detection units 9A and 9B is not limited. For example, in the detection units 9A and 9B of the above embodiment, the contact portion 91 contacts the grooves 711, 611 (the outer peripheral surface of the sheaves 71, 61) to detect the height (adhesion height) of the adhesion F, but the present invention is not limited to this configuration and may be configured to detect the adhesion height h of the adhesion F in a non-contact manner. In other words, the detection units 9A and 9B may be configured to detect that the adhesion F attached to the outer peripheral surface of the sheaves 71, 61 has reached a predetermined height (detection set value).

[0070] In the elevator 1 of the above embodiment, when the first and second detection units 9A and 9B detect once that the adhesion F has reached a predetermined height (detection set value), a detection signal is transmitted (alert) to a center or the like that remotely manages the elevator 1, but this configuration is not limited to this. For example, the control unit of the elevator 1 may be configured to transmit (alert) to the remote management center or the like when it receives a detection signal from the detection units 9A and 9B a preset number of times (e.g., three times, five times, etc.). By configuring in this way that a transmission (alert) is made to the remote management center or the like after one adhesion F is detected multiple times, it is possible to improve the detection accuracy of the adhesion F whose adhesion height h has reached the detection set value.

[0071] In addition, in the elevator 1 of the above embodiment, the sheaves (shears) on which the detection units 9A and 9B are arranged are the sheaves 71 and 61 with one groove 711 and 611, but may be a sheave (shears) T having a plurality of grooves M as shown in FIG. 11. In this case, the detection units 9A and 9B may detect the attachments F in all the grooves M. In this case, the detection units 9A and 9B may be arranged for each groove M. That is, a plurality of detection units 9A and 9B (the number of detection units corresponding to the number of grooves M) may be arranged for one sheave T. Also, a configuration may be adopted in which one detection unit 9 is arranged for a sheave T having a plurality of grooves M. In this case, the detection unit 9 may be configured to detect when the attachment F reaches a predetermined height in any of the grooves M. For example, in the example shown in Figure 11, rollers R that can rotate around one axis J are arranged at positions corresponding to each groove M of the axis J, and when any one of the rollers R passes over an adhesion F, the axis J moves together with the multiple rollers R in a direction away from the sheave T (see the arrow in Figure 11), thereby detecting the adhesion F.

[0072] Furthermore, the detection units 9, 9A, and 9B may detect adhesions F in some of the grooves M among the multiple grooves M of the sheave T. In this case, if the degree of adhesion of adhesion F in each groove M over time is the same, the arrangement or configuration of the detection units 9A and 9B may be such that they detect adhesions F in any of the grooves M. Furthermore, if there is a bias in the degree of adhesion of adhesion F in each groove M over time, the arrangement or configuration of the detection units 9A and 9B that detects adhesions in grooves M to which adhesion F is likely to adhere is preferable. [Explanation of symbols]

[0073] 1...Elevator, 2...Hoisting machine, 2a...Main sheave, 3...Main rope, 4...Cage, 5...Counterweight, 6...Lower sheave part, 61...Tension sheave, 61a...Axis, 611...Groove, 611a...Bottom, 62...Sinker, 7...Governor, 71...Governor sheave, 711...Groove, 711a...Bottom, 72...Base, 72a...Rotating shaft member, 73...Overspeed detection switch, 74...Rope clamping mechanism, 741...Fixed shoe, 742...Movable shoe, 743...Head, 744...Retaining hook, 75...Pendulum part, 751...Pendulum, 751a...First part, 751b...Second part, 752...Elastic member, 753...Pivot shaft, 8...Governor rope (rope), 9...Detection part, 9A...First detection part (detection part), 9B...Second detection part (detection part), 91...Contact part, 92...Groove roller, 92a...Axis, 93...Pressing part, 931...Expansion part, 932...Spring part, 95...Support part, 951...First part, 952...Second part, 96...Detection switch, F...Attachment, J...Axis, S1...Hoistway, S2...Machine room, T...Sheave (sheave), R...Roller, V...Speed, V 0 …Rated speed, V 1 …First specified value (first speed), V 2 …Second specified value, V A ...velocity amplitude, V K …Alarm speed (second speed), α1, α2…groove width

Claims

1. A rope connected to a car ascending and descending in a hoistway; a sheave having an outer circumferential surface around which the rope is wound and rotating in conjunction with the elevation and lowering of the car; a detection unit capable of detecting that a predetermined height of adhesion has adhered to the outer circumferential surface; a speed governor that detects speed abnormalities of the cage; A hoist that drives the car up and down, The sheave includes a first sheave provided in the speed governor and a second sheave for applying a predetermined tension to the rope, The rope is wound around the first sheave and the second sheave, The detection unit detects that the attachment has adhered to the predetermined height on the outer circumferential surface of at least one of the first sheave and the second sheave, The speed governor electrically stops the car when the speed of the rope reaches a first speed, The specified height is a value corresponding to the height of the adhesion when the rope speed becomes a second speed that is greater than the rated speed and smaller than the first speed while the hoist is raising or lowering the car at a rated speed.

2. A rope connected to a car ascending and descending in a hoistway; a sheave having an outer circumferential surface around which the rope is wound and rotating in conjunction with the elevation and lowering of the car; a detection unit capable of detecting that a predetermined height of adhesion has adhered to the outer circumferential surface; a speed governor that detects speed abnormalities of the cage; A hoist that drives the car up and down, The sheave includes a first sheave provided in the speed governor and a second sheave for applying a predetermined tension to the rope, The rope is wound around the first sheave and the second sheave, The detection unit detects that the attachment has adhered to the predetermined height on the outer circumferential surface of at least one of the first sheave and the second sheave, The speed governor electrically stops the car when the speed of the rope reaches a first speed, An elevator, wherein the specified height is a value corresponding to the height of the attachment when the maximum speed of the rope becomes a second speed which is smaller than the first speed when the rope speed changes to vibrate with an amplitude based on the attachment while the hoist is raising or lowering the car at a rated speed.

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