JP4662379B2 - Brake test method - Google Patents

Description

  The present invention relates to a brake test method for confirming brake torque of an elevator hoist.

  For example, there is disclosed an emergency stop device for an elevator that reduces the deceleration of the car when the car makes an emergency stop. The emergency stop device is a brake device for stopping the car, a remaining distance calculating means that is operated by an emergency stop signal and calculates a remaining distance to the last floor in the driving direction, and stops the car at the remaining distance. An emergency stop torque calculating means for calculating an emergency stop torque required for the vehicle, a stationary holding torque calculating means for calculating a stationary holding torque required for holding the car in a stationary state, and an emergency stop torque and a stationary holding torque. The required braking torque calculation means for selecting the larger one to obtain the required braking torque, and the brake control means for operating the brake device so as to generate the required braking torque are provided.

When an emergency stop signal is issued, this emergency stop device calculates the emergency stop torque required to stop the car at the remaining distance from the current position of the car to the terminal floor ahead in the driving direction, and further stops the car. The stationary holding torque required for holding in the state is calculated, and the larger one of them is selected as the required braking torque, and the required braking torque is generated by the brake device to cause the car to perform an emergency stop. For this reason, even if it is a case where it makes an emergency stop during driving | operation, there exists an effect that the deceleration of a cage | basket | car does not become excessive (for example, refer patent document 1).
JP 2001-278572 A

  By the way, the brake pads and the brake shoes often have minute irregularities. It is known that this minute unevenness affects the contact area of the brake pad and brake shoe with respect to the disk and drum, and consequently affects the torque performance of the brake. For this reason, before installing the hoisting machine, it is necessary to inspect the contact area of the brake shoe with the drum or the contact area of the brake pad with the disc in order to generate the brake torque necessary for the hoisting machine. In order to confirm the contact area, first, the brake shoe or pad is slid on the friction surface, and then the brake shoe or pad is removed from the hoisting machine. At this time, a glossy portion on the surface of the brake shoe or pad is visually confirmed, and it is inspected whether a necessary area is in contact with the friction surface.

  As described above, in the conventional hoisting machine brake device, in order to inspect the contact area of the brake shoe and the pad, it is necessary to remove them from the hoisting machine for confirmation, and the work is complicated. In addition, after the removed brake shoe or pad is mounted on the hoisting machine again, it is necessary to finely adjust the contact strength when the brake shoe or pad hits the drum or disc, which requires more work time. ing.

  An object of the present invention is to obtain a brake test method capable of easily confirming a contact area of a brake shoe or a pad with respect to a drum or a disk.

  In order to achieve the above object, a brake testing method according to one aspect of the present invention includes a drum and a brake shoe that contacts the drum and applies the brake or releases the brake away from the drum. And a test method for a brake used in an elevator hoisting machine having a brake device having a pressure sensitive sheet discolored by pressure in a gap between the drum and the brake shoe, Holding the brake shoe against the drum for a predetermined time so that the pressure-sensitive sheet is sandwiched between the drum and the brake shoe, the brake shoe is separated from the drum and the pressure-sensitive sheet is When the area of the discolored portion of the pressure-sensitive sheet is less than a certain value, the pressure-sensitive sheet is regarded as incompatible and processed.

  In order to achieve the above object, a brake testing method according to another aspect of the present invention includes a disc and a brake pad that contacts the disc and applies a brake, or releases the brake away from the disc. And a test method of a brake used in an elevator hoisting machine having a brake device having a pressure-sensitive sheet that changes color due to pressure in a gap between the disc and the brake pad, Holding the brake pad against the disc for a predetermined time so as to sandwich the pressure sensitive sheet between the disc and the brake pad, and separating the brake pad from the disc to hold the pressure sensitive sheet When the area of the pressure-sensitive sheet that has been discolored is less than a certain level, the pressure-sensitive sheet is regarded as nonconforming and processed. .

  According to the present invention, it is possible to obtain a brake test method capable of easily confirming a contact area of a brake shoe or a pad with respect to a drum or a disk.

  Hereinafter, an embodiment of an elevator hoisting machine will be described with reference to FIGS. 1 to 4.

  As shown in FIG. 1 and FIG. 2, the elevator hoisting machine 11 is configured by a flat disk shape having a small thickness. The hoisting machine 11 stops the rotation of the main shaft 12 incorporating a motor (not shown) in the center, the rotating shaft 13 protruding from the main body 12, the pulley 14 fixed to the tip of the rotating shaft 13, and the rotating shaft 13. And a brake device 15. The pulley 14 has a plurality of groove portions 16 around which a plurality of main ropes (not shown) for suspending a car and a balance weight are wound. The hoisting machine 11 can raise and lower the car through the main rope in the hoistway.

  The brake device 15 is provided in a pair on the side of the main body 12. That is, the brake device 15 includes a so-called static torque brake device 15A and a dynamic torque brake device 15B. The static torque brake device 15A is a brake for holding the car in a stationary state as it is. The dynamic torque brake device 15B is a brake for stopping the car by acting in an emergency on the car that is rising or descending.

  The brake device 15 is provided inside the main body 12, and has a cylindrical drum 21, a brake shoe 22 provided in the vicinity of the drum 21, and the brake shoe 22 is brought into contact with the drum 21. An electrical opening / closing device 23 that is separated from the drum 21 and a torque adjusting mechanism 24 for adjusting the pressing pressure of the brake shoe 22 against the drum 21 are provided. The brake shoe 22 is always pressed against the drum 21 by a spring mechanism (not shown). The electric switch 23 moves the brake shoe 22 away from the drum 21 against the bias of the spring mechanism by driving a built-in solenoid.

  The torque adjustment mechanism 24 includes a spring 25 that is in contact with the brake shoe 22 and a screw 26 for adjusting the compression amount of the spring 25. In the torque adjustment mechanism 24, the urging force by the spring 25 can be adjusted by the screwing amount of the screw 26. That is, the torque adjusting mechanism 24 adjusts the brake shoe 22 to be pressed strongly against the drum 21 or the brake shoe 22 is pressed weakly against the drum 21 by operating the screwing amount of the screw 26. Can do.

  With reference to FIG. 3 and FIG. 4, the pressure sensitive sheet 31 used for the brake test of the hoisting machine 11 of this embodiment is demonstrated. The pressure-sensitive sheet 31 is used to detect whether or not the brake torque is appropriate by detecting the pressing pressure of the brake shoe 22 against the drum 21.

  The pressure sensitive sheet 31 has substantially the same area as that of the brake shoe 22. The pressure sensitive sheet 31 has a first film 31A and a second film 31B. The first film 31A includes a base layer 32 made of PET (Polyethylene terephthalate), a color forming layer 34 provided on the surface of the base layer 32, and a large number of microcapsules 33 enclosing a color former, Is included. The second film 31B includes a base layer 32 made of PET, and a developer layer 35 provided on the surface of the base layer 32 and adsorbing the color former. The pressure sensitive sheet 31 used for the brake test has almost the same area as the area of the brake shoe 22. As the pressure sensitive sheet 31, for example, a sheet that can sense a pressure of 0.1 MPa to 10 MPa is used.

  Next, a brake test method using the pressure sensitive sheet 31 will be described. This brake test is performed before the hoisting machine 11 is installed in a building. First, the electric opening / closing device 23 of the hoisting machine 11 is driven, the brake shoe 22 is separated from the drum 21 of the brake device 15, and the brake is released. In this state, the pressure sensitive sheet 31 is installed in the gap between the drum 21 and the brake shoe 22. Thereafter, the electric switching device 23 is driven, and the brake shoe 22 is pressed against the drum 21 so that the brake is applied. In this state, the pressure sensitive sheet 31 is sandwiched between the drum 21 and the brake shoe 22. For example, the brake is applied for 2 minutes. Thereafter, the brake shoe 22 is released from the drum 21 to release the brake, and the pressure sensitive sheet 31 is removed.

  FIG. 4 shows the pressure-sensitive sheet 31 after the test. As shown in the pressure-sensitive sheet 31, the microcapsule 33 of the color developing layer 34 of the first film 31A is crushed at the portion receiving pressure, and the color former in the inside is developed by the color of the second film 31B. A chemical reaction occurs upon adsorption to the agent layer 35. As a result, the color of the developer layer 35 corresponding to the portion receiving the pressure changes. When the area of the discolored color changing portion 36 is, for example, 70% or more with respect to the entire area of the pressure-sensitive sheet 31, the surface of the brake shoe 22 with respect to the drum 21 is sufficient, and it is determined to be acceptable. On the other hand, when the area of the color changing portion 36 is, for example, 70% or less with respect to the entire area of the pressure sensitive sheet 31, the brake shoe 22 is treated as being incompatible. An example of a process for the inappropriate brake shoe 22 is a process of replacing the brake shoe 22 with another brake shoe 22.

  According to the present embodiment, the brake testing method includes a drum 21 and a brake device 22 that contacts the drum 21 to apply the brake and releases the brake away from the drum 21. 15 is used in an elevator hoisting machine 11, and a pressure-sensitive sheet 31 that changes color due to pressure is disposed in a gap between the drum 21 and the brake shoe 22, and then between the drum 21 and the brake shoe 22. The brake shoe 22 is pressed against the drum 21 so as to sandwich the pressure-sensitive sheet 31 and is held for a predetermined time. The brake shoe 22 is separated from the drum 21 and the pressure-sensitive sheet 31 is taken out. When the area of the portion is less than a certain level, it is regarded as nonconforming and processing is performed.

  According to this configuration, since the contact area of the brake shoe 22 with respect to the drum 21 can be inspected without removing the brake shoe 22 from the hoisting machine 11, the test can be performed easily and quickly. Further, in the conventional test method, since the inner surface of the detached brake shoe 22 is visually observed and confirmed, the judgment may vary depending on the skill level of the observing worker. In the test method of this embodiment, since the area of the color changing portion 36 of the pressure-sensitive sheet 31 is used for determination, it is possible to objectively determine whether or not the brake has passed or failed. Furthermore, once the brake shoe 22 is removed, it is not necessary to simply attach it, and it is necessary to finely adjust the strength of the brake shoe 22 against the drum 21 again. According to the test method of this embodiment, it is not necessary to remove or attach the brake shoe 22 or readjust the contact strength, and the work time required for the brake test can be greatly shortened.

  The second embodiment of the elevator hoisting machine will be described with reference to FIGS. The elevator hoisting machine 41 of the second embodiment is not a so-called thin type and is different from the first embodiment in that the whole is formed in a columnar shape, but other parts are common. . For this reason, a different part from 1st Embodiment is mainly demonstrated, the code | symbol same about the location which is common in 1st Embodiment is attached | subjected, and description is abbreviate | omitted.

  The elevator hoisting machine 41 includes a motor (not shown) and a cylindrical main body 42, a rotating shaft 13 protruding from the main body 42, a pulley 14 fixed to the tip of the rotating shaft 13, and a rotating shaft And a brake device 43 for stopping the rotation of 13.

  The brake device 43 is provided on the opposite side to the position where the pulley is provided, with the main body 42 interposed therebetween. As shown in FIG. 5, the brake device 43 is configured by a pair including a so-called static torque brake device 43 </ b> A and a dynamic torque brake device 43 </ b> B.

  The brake device 43 includes a disc 44 having a disk shape, a brake pad 45 provided in the vicinity of the disc 44, and an electric opening / closing device for bringing the brake pad 45 into contact with the disc 44 or separating it from the disc 44. 23 and a torque adjusting mechanism 24 for adjusting the pressing pressure of the brake pad 45 against the disc 44. The brake pad 45 is always pressed against the disk 44 by a spring mechanism (not shown). The electric switch 23 moves the brake pad 45 away from the disk 44 against the bias of the spring mechanism by driving a built-in solenoid.

  The torque adjustment mechanism 24 includes a spring 25 that is in contact with the brake pad 45 and a screw 26 for adjusting the amount of compression of the spring 25. In the torque adjustment mechanism 24, the urging force by the spring 25 can be adjusted by the screwing amount of the screw 26. That is, the torque adjusting mechanism 24 adjusts the brake pad 45 to be pressed strongly against the disk 44 or the brake pad 45 is pressed weakly against the disk 44 by manipulating the screwing amount of the screw 26. Can do.

  The pressure sensitive sheet 31 is the same as that shown in the first embodiment. The pressure sensitive sheet 31 has substantially the same area as the brake pad 45. The pressure-sensitive sheet 31 is used to detect the pressure of the brake pad 45 against the disc 44 and determine whether or not the brake torque is appropriate.

  Next, a brake test method according to the second embodiment will be described. This brake test is performed before the hoisting machine 41 is installed in a building. First, the electric switching device 23 is driven, and the brake pad 45 is separated from the disc 44 of the brake device 43 so that the brake is released. In this state, as shown in FIG. 6, the two pressure-sensitive sheets 31 are respectively installed in the gaps between the one disk 44 and the two brake pads 45. Thereafter, the electric switching device 23 is driven, and the brake pad 45 is pressed against the disk 44 so that the brake is applied. In this state, the pressure sensitive sheet 31 is sandwiched between the disc 44 and the brake pad 45. For example, the brake is applied for 2 minutes. Thereafter, the brake pad 45 is released from the disc 44 to release the brake, and the pressure sensitive sheet 31 is removed. In the pressure-sensitive sheet 31 after the test, when the area of the discolored portion 36 that is discolored is, for example, 70% or more with respect to the entire area of the pressure-sensitive sheet 31, the surface of the brake pad 45 with respect to the disk 44 is sufficient. It is judged that it passes. On the other hand, when the area of the color changing portion 36 is, for example, 70% or less with respect to the entire area of the pressure sensitive sheet 31, the brake pad 45 is treated as being incompatible. As processing for the inappropriate brake pad 45, there is processing for exchanging with another brake pad 45, and the like.

  According to the second embodiment, the brake device 43 including the disk 44 and the brake pad 45 that contacts the disk 44 to apply the brake and releases the brake away from the disk 44 is provided. A pressure-sensitive sheet 31 that is used in the elevator hoisting machine 41 and is discolored by pressure in a gap between the disk 44 and the brake pad 45 is disposed between the disk 44 and the brake pad 45. The brake pad 45 is pressed against the disc 44 and held for a predetermined time so as to sandwich the pressure pad. The brake pad 45 is separated from the disc 44 and the pressure-sensitive sheet 31 is taken out. If the value is above a certain level, it is accepted.

  According to this configuration, the contact area of the brake pad 45 against the disc 44 can be inspected without removing the brake pad 45 from the hoisting machine 41, so that the test can be performed easily and quickly. Moreover, according to the test method of this embodiment, the pass / fail per brake surface can be objectively determined by the pressure-sensitive sheet 31 without visual observation. Furthermore, according to the test method of the present embodiment, it is not necessary to remove and attach the brake pad 45 and readjust the contact strength, and the work time required for the brake test can be greatly shortened.

  The present invention is not limited to the embodiment described above. Of course, various modifications can be made without departing from the scope of the invention.

Sectional drawing which looked at the elevator hoisting machine which concerns on 1st Embodiment from the front direction. The side view which shows the winding machine for elevators shown in FIG. 1 from a horizontal direction. Sectional drawing which shows typically the pressure sensitive sheet used for the test of the brake device of the elevator hoist. The top view which shows the pressure sensitive sheet shown in FIG. 3 from upper direction. The front view which shows the winding machine for elevators concerning 2nd Embodiment. The side view which shows the winding machine for elevators shown in FIG. 5 from a side surface direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Elevator hoisting machine, 15 ... Brake device, 21 ... Drum, 22 ... Brake shoe, 31 ... Pressure sensitive sheet, 41 ... Hoisting machine, 43 ... Brake device, 44 ... Disc, 45 ... Brake pad

Claims (2)

Brake testing method used in an elevator hoisting machine comprising a drum and a brake shoe that contacts the drum and applies a brake or releases the brake away from the drum Because
After disposing a pressure-sensitive sheet that changes color according to pressure in a gap between the drum and the brake shoe, the brake shoe is attached to the drum so that the pressure-sensitive sheet is sandwiched between the drum and the brake shoe. The pressure-sensitive sheet is held for a predetermined time in a state where the pressure-sensitive sheet is pressed, the brake shoe is separated from the drum, the pressure-sensitive sheet is taken out, and the area of the discolored portion of the pressure-sensitive sheet is considered to be incompatible. A test method for a brake, characterized by applying a treatment. Brake test method used in an elevator hoisting machine comprising a disc and a brake pad that touches the disc to apply a brake and releases the brake away from the disc Because
After disposing a pressure-sensitive sheet that changes color by pressure in the gap between the disk and the brake pad, the brake pad is attached to the disk so that the pressure-sensitive sheet is sandwiched between the disk and the brake pad. The pressure-sensitive sheet is held for a predetermined time in a state where the pressure-sensitive sheet is pressed, the brake pad is separated from the disk, the pressure-sensitive sheet is taken out, and the area of the discolored portion of the pressure-sensitive sheet is considered to be incompatible. A test method for a brake, characterized by applying a treatment.

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