Elevator

Abstract

To provide an elevator capable of detecting an adhered substance adhered to a sheave to the predetermined height.SOLUTION: The elevator comprises: a rope connected to a car ascending and descending in a hoistway; a sheave having an outer peripheral surface around which the rope is wrapped and rotating in conjunction with ascension and descension of the car; and a detection unit capable of detecting an adhered substance adhered to the outer peripheral surface to a predetermined height.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an elevator in which a car moves up and down in a hoistway. [Background technology]

[0002] A sheave groove cleaning device has been known for some time (see Patent Document 1) 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.

[0003] This sheave groove cleaning device has an engaging portion that can engage with the sheave groove, and the engaging portion is covered with an elastic member. In an elevator equipped with this sheave groove cleaning device, the engaging portion engages with the sheave groove via the elastic member, causing the elastic member to elastically deform between the engaging portion and the sheave groove and fit into the sheave groove. In this state, the sheave rotates, causing the elastic member to slide against the sheave groove, thereby 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 deposits that cannot be removed 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 that can detect when a predetermined height of material has adhered to the sheave. [Means for solving the problem]

[0007] The elevator of the present invention is a rope connected to a car that ascends and descends within the 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 that a predetermined height of deposits has adhered to the outer peripheral surface.

[0008] With this configuration, the detection unit can detect that a predetermined height of matter 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 included in 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 (i.e., before the adhesion becomes large enough to cause the governor to erroneously detect an abnormal speed of the car).

[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 car at a rated speed.

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

[0013] The elevator also 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 speed of the rope changes to vibrate with an amplitude based on the attachment while the hoist is raising or lowering the car at a rated speed.

[0014] With this configuration, even when the rope speed 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), it is possible to prevent the governor from falsely detecting abnormal cage speed due to adhesions. [Effects of the Invention]

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

[0016] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an elevator according to this embodiment. [Figure 2] FIG. 2 is a diagram for explaining the configuration of a governor provided in the elevator. [Figure 3] FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the vicinity of the groove in the tension sheave with the governor rope wound around it. [Figure 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 moves over the adhering matter in the first detection unit. [Figure 7] FIG. 7 is a graph showing the vibration of the governor rope speed. [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 to derive 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 INVENTION

[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 having a main sheave 2a and disposed in an upper portion of the hoistway S1 or in a machine room S2 provided above the hoistway S1, a main rope 3 wound around the main sheave 2a, a car 4 connected to one end of the main rope 3 and moving up and down 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 unit 6 having a tension sheave 61 and arranged in the lower part of the hoistway S1, a governor (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 control 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 hoisting machine 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 the governor sheave 71 around which the 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 the machine room S2 provided above the hoistway S1.

[0023] 2, the governor 7 includes a governor sheave 71 around which the governor rope 8 is wound, a base 72 having a horizontally extending rotary shaft member 72a and supporting the governor sheave 71 in a freely rotatable state about the rotary shaft member 72a, an overspeed detection switch 73 that electrically stops the car 4 when the rotational speed of the governor sheave 71 exceeds a first specified value (overspeed value) V1, a rope clamping mechanism 74 that can clamp the governor rope 8, and a pendulum unit 75 that activates the rope clamping mechanism 74 when the rotational speed of the governor sheave 71 exceeds a second specified value (overspeed value) V2 that is greater than the first specified value V1. In the example of 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 direction in which the rotating shaft member 72a extends is referred to as the X-axis direction in the Cartesian coordinate system, the direction perpendicular to the direction in which the rotating shaft member 72a extends and horizontal is referred to as the Y-axis direction in the Cartesian coordinate system, and the up-down direction is referred to as the Z-axis direction in the Cartesian coordinate system.

[0025] 3, the governor sheave 71 has a groove (outer peripheral surface) 711 on its 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 in which the governor rope 8 fits).

[0026] When the ascent or descent 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 that can clamp the governor rope 8 between itself and the fixed shoe 741, and a retaining hook 744 that holds the head portion 743 at a position spaced apart from the fixed shoe 741 by the movable shoe 742. 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 uses centrifugal force to detect the speed (ascending speed and descending speed) of the car 4 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 elastic members 752 that bias 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 axis 753 extending in the X-axis direction. In each pendulum 751, a portion (first portion) 751a on one side of the rotation axis 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 axis 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 axis 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 synchronization with the running (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 the overspeed detection switch 73 operates, 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 even 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 and catches 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 (dimension in the X-axis direction) of this groove 611 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 62 applies a downward force to the tension sheave 61 by its own weight, thereby applying a predetermined tension to the governor rope 8 that is wound endlessly around the governor sheave 71 and the tension sheave 61.

[0037] The first detection unit 9A detects when a predetermined height of adhesion F has formed on the outer peripheral surface (groove in this embodiment) 711 of the governor sheave 71. This first detection unit 9A detects adhesion F when the height of 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, approximately 3 to 6 mm). The detection set value will be described in detail later. In this embodiment, adhesion F is comprised of rope oil seeping out from the governor rope 8, surrounding dirt, dust, etc., which adheres to the surface, and grows 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 the reference symbol 711a is the bottom surface 711a of the groove 711 of the governor sheave 71, and the part indicated by the 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, around 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 in accordance with the rotation of the governor sheave 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 comes into contact with 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 that extends it (i.e., toward the bottom surface 711a of the groove 711).

[0044] The detection switch 96 outputs a detection signal (responds to the 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 (announced) 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 announcement instructs 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 a biasing 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 comes into contact with 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. In the elevator 1 of this embodiment, the support portion 95 supports the contact portion 91 so that the contact portion 91 comes into contact with 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 units 9A and 9B will be described.

[0047] This detection set value is a speed (alarm speed) V when the speed (speed value) of the governor rope 8 is greater than the rated speed and smaller than the first specified value V1 while the hoisting machine 2 is running (raising or lowering) the car 4 at the rated speed. 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 (i.e., 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 of the governor rope 8 based on the adhesion F when 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 (i.e., when the speed value 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 a predetermined speed (warning speed) V that is smaller than the first specified value V1. K This is the value corresponding to the height (adhesion height) h of the deposit F when

[0049] As shown in Figure 8(A), when there is no adhesion F on each sheave (governor sheave 71, tension sheave 61), when the car 4 is traveling at the rated speed V0 (ascending in the example shown in Figure 8(A)), the governor rope 8 and each sheave 71, 61 move or rotate at a constant speed (rated speed) V0 following the car 4.

[0050] On the other hand, as shown in Figure 8(B), if an attachment F is attached (adhered) to one location around the circumferential surface of the governor sheave 71, in the initial stage of traveling immediately after the rated speed V0 is reached, the governor sheave 71 will rotate at approximately the rated speed V0 due to inertia, while the governor rope 8 will be wound up in excess at the time when it runs over the attachment F.

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

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

[0053] Furthermore, the speed amplitude V of the governor rope 8 A can also be calculated by calculation. In this calculation, the length (excess length) L0 of the governor rope 8 that is wound up extra when the governor rope 8 runs over the adhesion F is used, and this excess length L0 is calculated as follows, assuming that the shape of the adhesion F is triangular.

[0054] As shown in FIG. 10, when the adhesion F adhering to the governor sheave 71 is viewed from the direction of the rotation axis of the governor sheave 71, it is assumed that the shape of the adhesion F is a triangle with an adhesion height of h and an adhesion angle of θ. When the governor rope 8 passes through the path ABC (when the adhesion F is adhering), the distance L1 of the path ABC is given by: L1=2(r+h)sinθ=2(r+h)θ When the governor rope 8 passes through the path AC (when there is no attached object F), the distance L2 of the arc AC is L2=2πr×θ / 2π×2=2rθ The extra length L0 is the difference between L1 and L2, so L0=L1-L2=2hθ This becomes:

[0055] By calculation using the excess length L0 obtained as above, the velocity amplitude V A can be obtained.

[0056] Returning to FIG. 7, when vibration due to resonance occurs at the speed V of the governor rope 8 due to adhesion F on the governor sheave 71, the speed amplitude V increases as the adhesion F gradually increases (i.e., the adhesion height h gradually increases). A also gradually increases, and when it reaches the first specified value V1, the car 4 is stopped by the overspeed detection switch 73 of the governor 7 even if the rated speed V0 is lower than the first specified value V1 (that is, a mistrip occurs).

[0057] Therefore, the velocity amplitude V A The warning speed V is smaller than the first specified value V1. KWhen the speed amplitude V A is the warning speed V K The height h of the adhering 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 The warning speed V is set to about 1.1 to 1.2 times the rated speed V0. K By setting this 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 and 61 having grooves 711 and 611 around which the governor rope 8 is wound and which rotate in conjunction with the ascending and descending of the car 4, and detection units 9A and 9B capable of detecting that an attachment F has adhered to the grooves 711 and 611 up to a detection set height (predetermined height). This allows the detection units 9A and 9B to detect that an attachment F has adhered to the grooves 711 and 611 of the sheaves 71 and 61 up to the detection set height. In other words, attachment F can be detected before the speed change of the governor rope 8 caused by attachment F becomes large (i.e., before attachment F grows large enough to cause the governor 7 to erroneously detect an abnormal speed of the car 4 (a false trip) due to attachment F).

[0060] Furthermore, by being able to detect adhesion F when the adhesion height (adhesion height) h reaches the detection set value, it is possible to detect adhesion F before it grows large enough to cause the governor rope 8 to come off the grooves 711, 611 due to adhesion F (riding up, etc.), thereby preventing the rope from coming off the sheaves 71, 61 due to 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), and the governor rope 8 is wound around the governor sheave 71 and the tension sheave 61, and the detection units 9A and 9B detect that an attachment F has adhered to the grooves (outer surface) 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 it grows to such an extent that the governor 7 erroneously detects an abnormal speed of the car 4 (a false trip).

[0063] The elevator 1 of this embodiment is equipped with a hoist 2 that drives the car 4 to ascend and descend, and a governor (speed governor) 7 electrically stops the car 4 when the speed of the governor rope (rope) 8 reaches a first specified value (first speed) V1. The detection set value (predetermined height) of the detection units 9A and 9B is set to a warning speed (second speed) V0 that is greater than the rated speed V0 and smaller than the first specified value V1 when the speed of the governor rope 8 reaches a warning speed (second speed) V0 that is greater than the rated speed V0 and smaller than the first specified value V1 while the hoist 2 is ascending or descending the car 4 at the rated speed. K This is a value corresponding to the height h of the deposit F when the height h of the deposit F becomes . This makes it possible to prevent the governor 7 from erroneously detecting an abnormal speed of the car 4 (missing trip) due to the deposit F.

[0064] The elevator 1 of this embodiment also includes a hoist 2 that drives the car 4 to ascend and descend, and a governor 7 electrically stops the car 4 when the speed of the governor rope 8 reaches a first specified value (first speed) V1. The detection set value (predetermined height) of the detectors 9A and 9B is set by setting the resonant speed amplitude (amplitude) V based on the attachment F when the speed of the governor rope 8 reaches a first specified value (first speed) V1 while the hoist 2 is ascending or descending the car 4 at the rated speed V0. A When the governor rope 8 changes to vibrate at a speed (second speed) V that is smaller than the first specified value, KThis makes it possible to reliably prevent erroneous detection (mis-trip) of an abnormal speed of the car 4 by the governor 7 due to the adhesion F, even 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).

[0065] The elevator of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit 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 relative 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 relative to the main sheave 2a of the hoisting machine 2. In this case, by detecting and removing the attachment F that has adhered to the main sheave 2a before it exceeds a predetermined height (predetermined fixing height), it is possible to effectively prevent vibrations that may occur when the car 4 is running and the rope from coming off the main sheave 2a, which may be caused by the attachment F that has adhered to the main sheave 2a.

[0067] Furthermore, the detectors 9A and 9B may be arranged on other sheaves (shears). That is, the sheaves (shears) on which the detectors 9A and 9B are arranged may be any sheaves (shears) that have an outer circumferential surface around which a rope connected to the car 4 that moves up and down (travels) in the hoistway S1 is wound and that rotate in conjunction with the movement of the car 4.

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

[0069] Furthermore, 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 and 611 (the outer peripheral surfaces of the sheaves 71 and 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 adhering to the outer peripheral surfaces of the sheaves 71 and 61 has reached a predetermined height (detection set value).

[0070] Furthermore, 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 (announced) 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 (announce) a signal to the remote management center or the like when it receives a detection signal from the detection units 9A and 9B a predetermined number of times (e.g., three times, five times, etc.). By configuring in this way that a signal is transmitted (announced) to a remote management center or the like after one adhesion F is detected multiple times, the detection accuracy of adhesion F whose adhesion height h has reached the detection set value can be improved.

[0071] Furthermore, in the elevator 1 of the above embodiment, the sheaves (shears) on which the detection units 9A and 9B are arranged are sheaves 71 and 61 each having one groove 711 and 611, but the sheaves (shears) may also be sheaves (shears) T having a plurality of grooves M as shown in FIG. 11 . In this case, the detection units 9A and 9B may detect attachments F in all of 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 9A and 9B 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 attachments F reach 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 deposits 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 deposits F in each groove M over time is the same, the detection units 9A and 9B may be arranged or configured to detect deposits F in any of the grooves M. Furthermore, if there is a bias in the degree of adhesion of deposits F in each groove M over time, it is preferable to arrange or configure the detection units 9A and 9B to detect deposits in grooves M to which deposits F are more likely to adhere. [Explanation of symbols]

[0073] 1...Elevator, 2...Hoisting machine, 2a...Main sheave (sheave), 3...Main rope (rope), 4...Cage, 5...Counterweight, 6...Lower sheave part, 61...Tension sheave (sheave), 61a...Shaft, 611...Groove, 611a...Bottom, 62...Sinker, 7...Governor, 71...Governor sheave (sheave), 711...Groove, 711a...Bottom, 72...Base, 72a...Rotating shaft member, 73...Overspeed detection switch, 74...Rope clamping mechanism, 741...Fixed side shoe, 742...Movable side shoe, 743...Head part, 744...Retaining hook, 75...Pendulum part, 751...Pendulum, 75 1a...first portion, 751b...second portion, 752...elastic member, 753...rotating shaft, 8...governor rope (rope), 9...detection portion, 9A...first detection portion (detection portion), 9B...second detection portion (detection portion), 91...contact portion, 92...groove roller, 92a...shaft, 93...urging portion, 931...expanding portion, 932...spring portion, 95...support portion, 951...first portion, 952...second portion, 96...detection switch, F...attachment, J...shaft, S1...hoistway, S2...machine room, T...sheave (sheave), R...roller, V...speed, V0...rated speed, V1...first specified value (first speed), V2...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 that ascends and descends within the 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 that a predetermined height of matter has adhered to the outer peripheral surface.

2. a speed governor that detects speed abnormalities of the car, The sheave includes a first sheave included in 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 elevator according to claim 1 , wherein 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.

3. a hoist that drives the car to move up and down, the speed governor electrically stops the car when the speed of the rope reaches a first speed; 3. The elevator according to claim 2, wherein the predetermined height is a value corresponding to the height of the object attached when the speed of the rope 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.

4. a hoist that drives the car to move up and down, the speed governor electrically stops the car when the speed of the rope reaches a first speed; 3. The elevator according to claim 2, wherein the predetermined height is a value corresponding to the height of the attachment when the maximum speed of the rope becomes a second speed that is smaller than the first speed when the speed of the rope changes to oscillate with an amplitude based on the attachment while the hoist is raising or lowering the car at a rated speed.

Images