JP2008037611A - Adjusting tool of brake device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adjusting tool capable of applying a stable quality of adjusting operation to the brake device of existing elevators in a short time by having a simple structure. <P>SOLUTION: This adjusting tool 1 is used to adjust the setting of a sensor installed to detect the operating state of the brake device fitted to the hoist of elevators. The adjusting tool 1 comprises an extension rod 2, a supporting block 3, and a nut 4. The extension rod 2 is joined to a movable core 13 and extends through a fixed core 14 in the direction that the movable core moves. The supporting block 3 is inserted onto the extension rod 2 projecting from the fixed core 14 and brought into contact with the fixed core. The nut 4 is screwed with the screw formed in the outer periphery of the extension rod 2, and locked to the supporting block 3 in such a state that a brake shoe 12 is pulled apart from a disk (rotor) 11 against the biasing force of a spring 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an adjustment jig for a sensor that detects an operating state of a brake device assembled to an elevator hoist.

  A brake device is assembled as a safety device in an elevator hoist. An elevator including a disc brake as this brake device is disclosed in Patent Document 1. The disc brake operates while the elevator rider is on the target floor and during an emergency stop. The disc brake includes a disc, a brake shoe, a support L-shaped member, a brake lever, a brake magnet, an anchor plate, and a brake pressure spring.

  The support L-shaped material is fixed to the hoisting machine. The brake lever is pivotally supported by a pin provided on the support L-shaped member. The brake shoes are arranged in a pair with the disc interposed therebetween, and are connected to one end of the brake lever. The brake pressure springs are inserted in pairs with the spring stop shoulder sandwiched between the other ends of the brake lever, and are biased in the direction of expanding the other end of the brake lever. The brake magnet is connected to one of the other ends of the brake levers provided in a pair, and the anchor plate is connected to the opposite brake lever corresponding thereto. The brake magnet is an electromagnetic coil that attracts the anchor plate when activated. This loosens the brake.

  The disc brake includes a first position sensor and a second position sensor. The first position sensor detects that one of the pair of brake pressure springs is broken. The second position sensor detects that the brake lining provided on the brake shoe has worn beyond the maximum allowable wear amount.

  Further, as a disc brake used in an elevator, a disc brake including a spring assembly that adjusts a gap between a rotating disc and a brake shoe pressed against the disc is disclosed in Patent Document 2. This disc brake generates a braking force by pressing a non-rotating brake plate having a brake lining attached to the disc from one direction with a spring force. The non-rotating brake plate is pulled away by the electromagnet. The spring assembly sets a gap between the electromagnet and the disk and a gap between the non-rotating brake plate and the electromagnet, respectively.

  Furthermore, the electromagnetic disc brake described in Patent Document 3 includes a (non-rotating) disc, a guide pin, an armature (armature), a core, and an inner disc. The disc is fixed to the braked rotating machine. The guide pin is fixed to the disk and holds the armature so as to be movable along the axial direction. The core incorporates an electromagnetic coil and is mounted from the end of the guide pin. A spring is inserted between the core and the disk and between the core and the armature so as to urge them away from each other.

  The inner disk is fitted with a lining, is fitted to a rotating shaft by a spline, and is mounted between the disk and the armature. The position of the core is adjusted by an adjustment member attached to a screw portion provided at the tip of the guide pin. Thereby, the size of the gap provided between the core and the armature is adjusted.

Although not specifically described in Patent Documents 1-3 described above, the elevator includes a sensor that detects that the brake device is mechanically operating correctly while the rider is landing on the target floor. This sensor is often provided between the armature and the electromagnet in Patent Document 2 and Patent Document 3. In this case, since the brake shoe is worn over time, it is necessary to periodically check and adjust the sensor setting.
JP-A-5-193858 Japanese Patent Laid-Open No. 5-97362 JP-A-5-71562

  The brake device works even in emergency stop situations. Therefore, it is desirable that the movement in which the brake device operates is minimal in order to increase the response speed until the braking force is generated. In the setting of such a brake device, the sensor for detecting the movement has a simple structure that does not cause a malfunction and must be set with high accuracy.

  In an inspection performed at a factory before shipment, a dedicated detector that detects the timing at which the sensor is activated by operating the brake device while simultaneously detecting the output of the digital dial gauge and the output of the sensor is used. However, such special measuring devices are expensive. In other words, if a quantity commensurate with the number of installed elevators is prepared for use in periodic inspections, the cost does not match.

  In addition, the working environment around the brake device may vary depending on the specifications of the elevator. Furthermore, the above-described device is a device that performs measurement to the last, and sensor settings must be individually adjusted based on the measurement results. Therefore, it takes time for setup and adjustment work for setting on the site.

  Therefore, the present invention provides an adjustment jig capable of performing stable quality adjustment work in a short time with respect to an existing elevator brake device by providing a simple structure excellent in workability.

  The adjustment jig according to the present invention is used when adjusting the setting of a sensor provided to detect the operating state of a brake device assembled in an elevator hoist. The brake device includes a rotor, a brake shoe, a movable iron core, a spring, and a fixed iron core. The rotor rotates in conjunction with the hoist. The brake shoe is provided so as to be movable in a direction in which the brake shoe is pressed against the rotor. The movable iron core is linked to the brake shoe. The spring biases the brake shoe toward the rotor. The fixed core contains an electromagnet. The electromagnet attracts the movable iron core against the biasing force of the spring. The sensor binaryly detects the braking state and the non-braking state of the brake device as a relative displacement between the movable iron core and the fixed iron core.

  The adjustment jig includes an extension rod, a support block, and a nut. The extension rod is coupled to the movable iron core and extends through the fixed iron core in a direction in which the movable iron core moves. The support block is extrapolated to an extension rod protruding from the fixed iron core and comes into contact with the fixed iron core. The nut is screwed into a screw provided on the outer periphery of the extension rod, and is locked to the support block in a state where the brake shoe is pulled away from the rotor against the biasing force of the spring.

  In this case, the support block should be set to a switching position where the output of the sensor is switched while the nut is rotated in a range from the state in which the movable iron core is in close contact with the fixed iron core to the state in which the brake shoe is in close contact with the rotor. The allowable range is displayed as the rotation angle of the nut.

  Moreover, when fixing the nut screwed into the extension shaft in a state where the brake shoe is in close contact with the rotor at a position where the nut comes into contact with the support block, the adjustment jig further includes a first shim and a second shim. The first shim has a maximum thickness that prevents the sensor output from being switched by being inserted between the support block and the nut. The second shim has a minimum thickness so that the output of the sensor is always switched by being inserted together with the first shim between the support block and the nut.

  According to the adjusting jig of the present invention, since the structure is simple, handling in setup and the like is easy and workability is excellent. Therefore, stable quality adjustment work can be performed in a short time with respect to the existing elevator brake device. In addition, the operator can visually check the positioning of the sensor that detects the operating state of the brake device, and a large-scale device is not required.

  Since this adjustment jig has a simple structure, it can be made inexpensively. With this jig, it is possible to perform both the checking operation of the setting state and the adjustment work. Accordingly, it is possible to reduce the cost related to a series of work in the maintenance and inspection of the brake device.

  Furthermore, according to the invention in which the set allowable range is displayed on the support block as the rotation angle of the nut, the work efficiency can be further improved. Moreover, according to the invention including the first shim and the second shim, when adjusting the sensor settings, the setting conditions can be changed with good reproducibility by inserting or removing these shims. it can. Further, by changing the thickness of each of the first shim and the second shim, it is possible to easily cope with the case where the setting differs for each brake device according to the specifications of the elevator.

  An adjustment jig 1 according to a first embodiment of the present invention will be described with reference to FIGS. The adjustment jig 1 shown in FIG. 1 is used to check the setting state of a sensor 20 provided to detect the operating state of a brake device 10 assembled in an elevator hoisting machine, and adjust as necessary. .

  The brake device 10 shown in FIG. 1 is an electromagnetic disc brake. The brake device 10 operates while the elevator rider is landing on a target floor and when the moving rider needs to be stopped urgently and suspends the rider in the hoistway. It prevents mechanically that the traction sheave of the hoisting machine on which the main rope is sprinkled rotates.

  As shown in FIG. 1, the brake device 10 includes a disk 11, a brake shoe 12, a movable iron core 13, a fixed iron core 14, and a spring 15. The disk 11 is a rotor that rotates in conjunction with the hoisting machine. In this embodiment, the disk 11 is fitted to the end of the traction sheave to which the main rope is hooked by a spline 16. The brake shoes 12 are arranged in a pair with the disc 11 in between, and are held by a caliper 17.

  One brake shoe 12 is movable with respect to the caliper 17, and the other brake shoe 12 is fixed to the caliper 17. The caliper 17 is a floating caliper and moves so that the brake shoes 12 provided in a pair do not come into contact with the disk 11. Therefore, substantially any brake shoe 12 is provided so as to be movable in a direction in which it is pressed against the disk 11.

  The movable iron core 13 is disposed along a plane parallel to the disk 11, and is connected to a brake shoe 12 movably held with respect to the caliper 17 at a central portion. The spring 15 is compressed in a direction that urges the movable iron core 13 toward the disk 11. The fixed iron core 14 is formed in a cylindrical shape and incorporates a coil 14a serving as an electromagnet. In the fixed iron core 14, holes 14b for accommodating the springs 15 are provided at equal intervals around the coil 14a.

  The central portion of the fixed iron core 14 has a through hole 14c in the direction in which the movable iron core 13 moves. The movable iron core 13 includes a center rod 13a extending from the central portion along the through hole 14c. The center rod 13a is provided with a screw hole 13b coaxially from the tip side.

  The winding center of the coil 14 a is arranged coaxially with the shaft 12 a that supports the movable brake shoe 12. The coil 14 a generates an attractive force by a magnetic field in a direction in which the movable iron core 13 is attracted against the urging force of the spring 15. The fixed iron core 14 is integrally connected to the caliper 17. Therefore, the spring 15 biases each of the brake shoes 12 provided in a pair toward the disk 11. Moreover, as shown in FIG. 1, the fixed iron core 14 is provided with a recess 14d on the outer peripheral side wall.

  In the present embodiment, the spring 15 is a compression coil spring having a rectangular cross section. By making the cross-sectional shape of the wire rod rectangular, it is easy to accurately correspond the proportional relationship between the load on the spring 15 and the deflection to the calculated value.

  The sensor 20 is attached to a holder 14e formed in the recess 14d. In the range from the state in which the movable iron core 13 is in close contact with the fixed iron core 14 to the state in which the brake shoe 12 is in close contact with the disc 11, the sensor 20 is either close to or far from the fixed iron core 14. It has a function to detect in value. That is, the sensor 20 detects whether the brake device 10 is in the non-braking state P1 or the braking state P2 as a relative position between the movable iron core 13 and the fixed iron core 14, and the output is two. It has a switching position that switches in value.

  The sensor 20 is a so-called push-type switch, and a screw is formed on the outer peripheral surface so that the fixing position with respect to the holder 14e can be adjusted along the direction in which the movable iron core 13 is displaced. The sensor 20 is fixed by screwing nuts 21 and 22 from both sides across the holder 14e.

  The adjustment jig 1 includes an extension rod 2, a support block 3, and a nut 4. The extension rod 2 is coupled to the movable iron core 13 by being screwed into a screw hole 13b provided in the center rod 13a, and extends through the fixed iron core 14 in the direction in which the movable iron core 13 moves. The extension rod 2 is fixed to the center rod 13a with an appropriate length by the lock nut 5. The support block 3 is extrapolated to the extension rod 2 protruding from the fixed iron core 14 and abuts on the fixed iron core 14. The nut 4 is screwed into a screw 2 a provided on the outer periphery of the extension rod 2 and is locked to the support block 3 in a state where the brake shoe 12 is pulled away from the disk 11 against the urging force of the spring 15.

  In the present embodiment, the extension rod 2 is a bolt having a sufficient length. In consideration of mounting the lock nut 5, the support block 3, and the nut 4 in order, it is also preferable to use a hexagon socket head cap bolt without a head portion as the extension rod 2.

  Next, a method for using the adjustment jig 1 will be specifically described. First, the coil 14a is energized, the movable iron core 13 is brought into close contact with the fixed iron core 14 as shown in FIG. 1, the brake device 10 is brought into the non-braking state P1, and the adjusting jig 1 is mounted. The lock nut 5, the support block 3, and the nut 4 are previously attached to the extension rod 2, respectively.

  When the adjusting jig 1 is mounted, the brake device 10 is maintained in the non-braking state P1 in which the brake shoe 12 is opened with respect to the disk 11 even if the current of the coil 14a is cut off. The torque for tightening the nut 4 toward the support block 3 is moderate so that there is no gap between the movable iron core 13 and the fixed iron core 14 when the current of the coil 14a is cut off due to manufacturing tolerances of the threaded portion of each member. It is desirable to manage.

  When the nut 4 is loosened counterclockwise from the non-braking state P <b> 1 shown in FIG. 1, the movable iron core 13 gradually moves away from the fixed iron core 14. Then, as shown in FIG. 2, the brake shoe 12 comes into close contact with the disk 11, and the brake device 10 enters the braking state P2. The sensor 20 must have a turning position where the output changes in a binary manner while the movable iron core 13 moves from the non-braking state P1 of the brake device 10 to the braking state P2. In this case, in order to detect early that the brake device 10 is in the braking state P2, the conversion position is set corresponding to the case where the movable iron core 13 is closer to the fixed iron core 14, as shown in FIG. Is desirable.

  Therefore, a measuring instrument such as a tester is connected to the terminal block to which the cable 23 extending from the sensor 20 is connected, and the output of the sensor 20 is measured to confirm whether the change position is set to a preferred position. As an example, a case will be described below in which a sensor 20 is applied that is in a non-conducting state when the brake device 10 is in the non-braking state P1, and is in a conducting state when the brake device 10 is in the braking state P2.

  1 and 4 in which the movable iron core 13 is in close contact with the fixed iron core 14 (non-braking state P1), the brake shoe 12 is in close contact with the disk 11 in the fully closed state of brake (braking). In order to make it easier to confirm the switching position where the output of the sensor 20 is switched in a binary manner while the nut 4 is loosened until the state P2), in this embodiment, as shown in FIG. On the surface of the block 3, the rotation angle of the nut 4 corresponding to the positions D1, D2, D3, D4 of the movable core 13 with reference to the fixed core 14 shown in FIG. 4 is indicated by ruled lines K1, K2, K3, K4. ing.

  The positions of the ruled lines K1, K2, K3, and K4 can be easily obtained from the amount expected in advance as the displacement amount of the movable iron core 13 and the screw pitch of the nut 4. The position D1 is a position where the movable iron core 13 is in close contact with the fixed iron core 14. The position D2 is the minimum movement position of the movable iron core 13 at which the sensor 20 detects the conversion position. The position D3 is the maximum movement position of the movable iron core 13 at which the sensor 20 detects a value in conversion. The position D4 is the position of the movable iron core 13 in the brake fully closed state (braking state P2) where the brake shoe 12 is in close contact with the disk 11.

  Further, in order to make it easy to understand the angle at which the nut 4 is rotated, as shown in FIG. 3, in the fully open state (non-braking state P <b> 1) where the movable iron core 13 is in close contact with the fixed iron core 14, A “zero” ruled line K1 marked on the support block 3 is aligned with the corner 4a. Next, the nut 4 is loosened counterclockwise in FIG. 3 while interrupting the current of the coil 14a and observing the output of the tester. The movable iron core 13 is urged by the spring 15 and moves in a direction away from the fixed iron core 14, that is, the side where the brake device 10 is in the braking state P2.

  If the change position of the sensor 20 is detected while the corner 4a of the nut 4 that is first aligned with the “zero” ruled line K1 is within the detection range T shown in FIG. This means that the braking state can be detected normally. Further, the nut 4 is tightened clockwise, and it is confirmed that the change position is detected in the detection range T defined by the ruled lines K2 and K3. The “detection range” is a state in which the sensor 20 is erroneously reversed in the brake fully open state (non-braking state P1) or the brake fully closed state (braking state P2) even when the reproducibility of the operation of the sensor 20 varies. Is not detected, that is, it is an allowable range in which the conversion position is always detected with good reproducibility within this range.

  When the change position is detected outside the detection range T, the sensor 20 is inspected in the following manner. First, the nut 4 is alternately tightened or loosened to check whether the variation in the conversion position of the sensor 20 falls within the detection range T. When this variation falls within the detection range T, the corner 4a of the nut 4 aligned with the ruled line K1 of “zero” is aligned with the center of the detection range T in the brake fully open state (non-braking state P1). In this state, the mounting position of the sensor 20 with respect to the holder 14e is adjusted so that the conversion position of the sensor 20 is detected.

  When the variation of the position where the change position of the sensor 20 is detected is wider than the detection range T, the sensor 20 is replaced with a new one. The procedure for attaching the sensor 20 to the holder 14e is the same as that for finely adjusting the attachment position. In addition, after positioning so that the conversion position is in the center of the detection range T, it is checked again whether the variation is within the detection range T.

  Further, in order to confirm the degree of wear of the brake shoe 12, the torque required to turn the nut 4 is sufficiently larger than the specified value with the corner 4a of the nut 4 aligned with the ruled line K4. Check. The ruled line K4 is determined from the design of the brake device 10 which is obtained from the screw pitch of the extension rod 2 and the nut 4 of the adjusting jig 1 with respect to the brake fully open state (non-braking state P1) in which the movable iron core 13 is in close contact with the fixed iron core 14. The position of the brake fully closed state (braking state P2) is displayed.

  As described above, the adjustment jig 1 is configured to perform inspection work for confirming whether the sensor 20 for detecting whether or not the brake device 10 is operated normally, and the sensor 20 is out of the detection range T. This is utilized in any of the adjustment operations for adjusting the mounting position of the sensor 20 when the sensor 20 is present. The adjustment jig 1 once mounted for the inspection work can be used in the adjustment work as it is. Since the same jig can be used in related operations, the time required for setup for these operations can be reduced. Further, the inspection work for the change position and the adjustment work for the mounting position can be performed with simple procedures without using a complicated device. Therefore, it is possible to provide a maintenance service with stable quality regardless of the proficiency level for these operations.

  Next, an adjustment jig 1 according to a second embodiment of the present invention will be described with reference to FIGS. The adjustment jig 1 of this embodiment is different from the adjustment jig 1 described in the first embodiment in that it further includes a first shim 7 and a second shim 8. About others, it is the same as the adjustment jig 1 of 1st Embodiment. Therefore, configurations having the same functions are denoted by the same reference numerals and description thereof is omitted.

  The adjustment jig 1 according to the present embodiment inserts and removes the first shim 7 and the second shim 8 so that the output of the sensor 20 for detecting the braking state of the target brake device 10 is appropriate. Whether the state is set or not is checked, and fine adjustment is performed so that the change position of the output of the sensor 20 that changes in binary is within the detection range T. Therefore, the nut 4 of the adjusting jig 1 is fixed to the extension rod 2 so as to abut on the support block 3 in the brake fully closed state (braking state P2) in which the brake shoe 12 is in close contact with the disk 11.

  In this case, the nut 4 has a double nut structure with a lock nut 9 as shown in FIG. 5 and FIG. Apply a nut with Moreover, you may hold down with a retaining ring with a tongue or a C ring. For convenience of explanation, the case where the output of the sensor 20 is non-conductive in the brake fully open state (non-braking state P1) and conductive in the brake fully closed state (braking state P2) will be described as an example.

  Even if the first shim 7 is inserted between the support block 3 set to the brake fully closed state (braking state P2) and the nut 4, the first shim 7 has the maximum thickness that allows the output of the sensor 20 to be conductive. Yes. That is, while the movable core 13 is displaced by inserting the first shim 7, the sensor 20 is inserted in order to confirm that it does not have a conversion position.

  The second shim 8 is inserted between the support block 3 and the nut 4 together with the first shim 7 so that the output of the sensor 20 is surely switched to a non-conductive state. If the second shim 8 is further inserted while the first shim 7 is inserted, it is confirmed that the output of the sensor 20 is switched to the non-conducting state. That is, the movable iron core 13 in the state where the first shim 7 is inserted is inserted in order to confirm that it has the conversion position while being displaced by inserting the second shim 8. . Therefore, the thickness of the second shim 8 corresponds to the detection range T of the sensor 20 while the movable iron core 13 is displaced. Note that the second shim 8 may be integrally provided with a thickness including the first shim 7 and may be inserted in place of the first shim 7.

  As shown in FIG. 5, the first shim 7 and the second shim 8 are smaller than the outer diameter of the nut 4 so that they can be inserted into the extension rod 2 between the support block 3 and the nut 4. Slots 7a and 8a having a width larger than the outer diameter are formed. Further, the first shim 7 and the second shim 8 have tabs 7b and 8b so as to be easy to handle when inserting and removing.

  The inspection and adjustment operations are performed according to the following procedure. First, the nut 4 is brought into contact with the support block 3 and fixed in a fully closed state of the brake. Next, the coil 14a is energized to bring the brake device 10 into a fully opened state so that the movable iron core 13 and the fixed iron core 14 are brought into close contact with each other. Since there is a gap between the support block 3 and the nut 4, the first shim 7 is inserted here, and the energization of the coil 14a is stopped. The movable iron core 13 is held in a state of being biased by the thickness of the first shim 7. It is confirmed that the sensor 20 is in a conductive state with the first shim 7 being sandwiched.

  Next, it is confirmed that the output of the sensor 20 is in a non-conductive state by moving the movable iron core 13 by the detection range T. The coil 14 a is energized again to bring the movable iron core 13 into close contact with the fixed iron core 14. A second shim 8 is further inserted between the support block 3 in which the first shim 7 has already been inserted and the nut 4 to cut off the energization of the coil 14a. Thereby, it can confirm that the change position of the sensor 20 is set in the detection range T. In addition, if the sensor 20 is turned off with the second shim 8 inserted and the sensor 20 is turned on with the second shim 8 repeated several times, the reproducibility of whether the change position is always within the detection range T is repeated. Can also be confirmed.

  When the conversion position is out of the detection range T, a third shim having a thickness half that of the second shim 8 is inserted instead of the second shim 8, and the conversion position of the sensor 20 matches in that state. Thus, the mounting position of the sensor 20 is finely adjusted. Instead of applying the third shim, the conversion position of the sensor 20 is adjusted with the first shim 7 inserted, and the conversion position is detected in accordance with the pitch of the screw provided on the outer periphery of the sensor 20 from here. Adjust in the direction away from the movable iron core 13 so as to be provided in the T, or in a state where the first shim 7 and the second shim 8 are inserted, match the conversion positions of the sensors 20 to coincide with each other. Adjustment may be made so that the conversion position falls within the detection range T by adjusting the direction toward the movable iron core 13 so that the conversion position is provided within the detection range T according to the screw pitch of the outer periphery of 20.

  The degree of wear of the brake shoe can be checked as follows. First, after fixing the nut 4 so as to contact the support block 3 in the fully closed state of the brake, the coil 14a is energized to make the brake fully open. Next, a first gauge having a thickness slightly larger than the minimum movable stroke of the designed brake shoe and a second gauge having a thickness slightly larger than the maximum movable stroke are connected to the support block 3 and the nut 4. Try inserting it in between. If the first gauge enters between the support block 3 and the nut 4 and the second gauge does not enter, it indicates that it is within the suitability value. If the second gauge does not enter, the brake shoe 12 has been worn out, so it is replaced.

  In addition to the above-described procedure, the inspection operation and adjustment operation of the sensor 20 can be performed by the following procedure. In this case, first, in a state where the coil 14a is energized and the movable iron core 13 is brought into close contact with the fixed iron core 14, the fourth shim is inserted, the nut 4 is tightened, and the position is fixed. When the fourth shim is removed and the coil 14a is de-energized, the movable iron core 13 is separated from the fixed iron core 14 by the thickness of the fourth shim by the urging force of the spring 15. The fourth shim has such a size that the sensor 20 is always in a non-conductive state even if the movable iron core 13 moves by this thickness.

  Next, the second shim 8 having a thickness corresponding to the detection range T is sandwiched between the support block 3 and the nut 4 together with the fourth shim with the brake 14 fully energized to the coil 14a, and the nut 4 is tightened. After fixing in the state, the second shim 8 and the fourth shim are removed. By shutting off the coil 14a, it is confirmed that the sensor 20 is in a conductive state when the movable core 13 moves to a position where the nut 4 is locked to the support block 3.

  If the conductive state is not established, the mounting position of the sensor 20 is adjusted. Further, when the nut 4 is fixed to the extension rod 2 by using a fifth shim corresponding to the moving amount of the movable iron core 13 from the brake fully open state to the brake fully closed state, the brake shoe 12 is turned off when the coil 14a is de-energized. Is in contact with the disk 11. If the brake shoe 12 is in close contact and the disk 11 cannot be restrained, it means that the brake shoe 12 has been worn out and is replaced.

  As described above, if the adjustment jig 1 in each of the above-described embodiments is used, in order to confirm whether or not the conversion position is an appropriate position, whether or not the sensor 20 itself has continuity is determined by a measuring instrument such as a tester. It can be easily done by checking. That is, since it is determined in a binary manner whether or not the sensor 20 is set to an appropriate state, variations due to individual differences during measurement can be reduced.

  In addition, when a sensor whose output continuously changes is applied, if the output level in the detection range T in which the change position is to be detected is calibrated so as to become a threshold value (detection value), a sensor that switches binaryly. It is possible to apply as By doing this, instead of finely adjusting the sensor position, the sensor detection value itself is calibrated, so even if the amount to be adjusted is small and fine adjustment is difficult, adjustment work can be performed easily. Can do.

  In each of the above-described embodiments, the sensor 20 has been described by taking a push-type switch as an example. Any type of sensor such as a mechanical type, an electromagnetic type, an optical type, and a capacitance type can be applied to the sensor as long as the output is switched in a binary manner other than the above-described ones. A sensor whose output changes continuously can also be used. In this case, an arbitrary value of the output is detected as the conversion position. When adjusting the mounting position of the sensor, any value detected as the conversion position may be changed, so that the sensor setting can be adjusted without physically adjusting the mounting position of the sensor.

  The adjusting jig of the present invention is not limited to the field of elevators and can be used for adjusting a sensor provided for checking the operating state of a disc brake or a disc clutch.

Sectional drawing which shows the adjustment jig of 1st Embodiment which concerns on this invention in application to the brake device attached to the hoisting machine of an elevator. Sectional drawing which shows the state which rotates the nut of the adjustment jig shown in FIG. 1, and the brake shoe of a brake device contacts a disk. The perspective view of the adjustment jig shown in FIG. The side view which shows the sensor provided in the brake device shown in FIG. Sectional drawing which shows the adjustment jig of 2nd Embodiment which concerns on this invention being applied to the brake device attached to the elevator hoisting machine. FIG. 6 is a perspective view of the adjustment jig illustrated in FIG. 5.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Adjustment jig, 2 ... Extension rod, 3 ... Support block, 4 ... Nut, 7 ... 1st shim, 8 ... 2nd shim, 10 ... Brake apparatus, 11 ... Disc (rotor), 12 ... Brake Shoe, 13 ... movable iron core, 14 ... fixed iron core, 14a ... coil (electromagnet), 15 ... spring, 20 ... sensor, P1 ... non-braking state, P2 ... braking state, K1 ... corner corner in the non-braking state K2: Ruled line corresponding to the minimum movement position of the movable iron core when the sensor detects the change position, K3 ... Ruled line corresponding to the maximum movement position of the movable iron core when the sensor detects the change position, K4: Maximum moving position of the movable iron core when the brake shoe is in close contact with the disc by design based on the non-braking state, T: Detection range.

Claims (3)

A brake device assembled to an elevator hoisting machine is a rotor that rotates in conjunction with the hoisting machine, a brake shoe that is movable in a direction to be pressed against the rotor, and an interlocking with the brake shoe. A movable iron core, a spring that urges the brake shoe toward the rotor, and a fixed iron core that incorporates an electromagnet that attracts the movable iron against the urging force of the spring. A sensor that binaryly detects a braking state and a non-braking state as a relative position displacement between the movable iron core and the fixed iron core, and an adjustment jig that adjusts the setting of the sensor,
An extension rod coupled to the movable core and extending through the fixed core in a direction in which the movable core moves;
A support block extrapolated to the extension rod protruding from the fixed iron core and abutting on the fixed iron core;
And a nut that is screwed into a screw provided on the outer periphery of the extension rod and is locked to the support block in a state in which the brake shoe is pulled away from the rotor against the biasing force of the spring. Adjusting jig.   The support block is configured to switch the output of the sensor while rotating the nut in a range from a state in which the movable iron core is in close contact with the fixed iron core to a state in which the brake shoe is in close contact with the rotor. The adjustment jig according to claim 1, wherein an allowable range in which a position is to be set is displayed as a rotation angle of the nut. When the nut that is screwed into the extension rod in a state where the brake shoe is in close contact with the rotor is fixed at a position in contact with the support block,
A first shim having a maximum thickness at which the output of the sensor is not switched by being inserted between the support block and the nut;
2. A second shim having a minimum thickness at which the output of the sensor is surely switched by being inserted together with the first shim between the support block and the nut. The adjustment jig described in 1.

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