JP2018091451A - Disc brake device and disc brake monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constantly monitor a braking condition of a disc brake in a disc brake device of an electric motor.SOLUTION: In each of disc brake devices 18a, 18b of each of electric motors 15a, 15b, a laser emitting device and a laser receiving device are arranged with a brake pad interposed therebetween. When the sum of clearances between the disc and the brake pad exceeds a threshold value determined on the basis of a clearance between the disc and the brake pad, the disc brake device issues an alarm sound for recommending exchanging the brake pad.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a disc brake device and a disc brake monitoring method.

  Usually, when conveying a steel plate with a conveyance roll, conveyance of a steel plate may be stopped due to a change in steel plate processing, steel plate processing, or equipment failure. At this time, some force acts on the steel plate in the longitudinal direction of the steel plate, the transport roll in a stopped state rotates, and the steel plate may move.

  For example, when a preceding steel plate (preceding steel plate) and a succeeding steel plate (following steel plate) are welded with a welding machine in order to continuously convey the steel plate to a continuous annealing furnace, the preceding steel plate and the succeeding steel plate are located at the position of the welding machine. The steel plate is stopped, and the tail end of the preceding steel plate and the tip of the succeeding steel plate are butted against each other, but some force acts in the longitudinal direction of the preceding steel plate and / or the succeeding steel plate, and the tail end and / or the following of the preceding steel plate The tip of the steel plate may move from the welding position.

  In this case, it is necessary to drive the transport roll as appropriate to align the tail end of the preceding steel plate and the tip of the subsequent steel plate again, and the operation efficiency naturally decreases.

  Normally, when transporting a steel plate is stopped, the disc brake of the motor that drives the transport roll is maintained in an activated state so that the transport roll does not rotate even if some force acts on the steel plate in the stopped state in the longitudinal direction of the steel plate. To.

  In FIG.1 and FIG.2, the one aspect | mode of the steel plate conveyance roll apparatus is shown. The side surface aspect of a steel plate conveyance roll apparatus is shown in FIG. 1, and the upper surface aspect of a steel plate conveyance roll apparatus is shown in FIG.

  In the steel plate transport roll device, a bearing 3a and a bearing 3b attached to both sides of a steel stand 3 erected on a base 1a on the base 1, a transport roll 2a that winds and transports the steel plate S in an S shape, The transport rolls 2b are pivotally supported.

  On the side of the transport roll 2a, an arm 7 that pivotally supports a roll holder 6 having a set of presser rolls 4a and 4b on its lower surface is disposed so as to be movable up and down by an expansion / contraction means 8. An arm 10 that pivotally supports a roll holder 9 having a set of presser rolls 5a and 5b on the upper surface is disposed on the side of the transport roll 2b so as to be movable up and down by an expansion / contraction means 11.

  When the steel sheet S is wound around the transport roll 2a and the transport roll 2b in an S shape and transported, in order to smooth and stabilize the transport, the expansion / contraction means 8 and the expansion / contraction means 11 are operated to form a set of presser rolls 4a. 4b and a set of presser rolls 5a and 5b are pressed against the steel sheet S.

  FIG. 2 shows an arm 7 that pivotally supports a roll holder 6 having a set of presser rolls 4a and 4b on the lower surface and a set of presser rolls 5a and 5b on the upper surface in the steel sheet transport roll apparatus shown in FIG. The upper surface aspect which removed the arm 10 which pivotally supports the roll holding body 9 provided is shown.

  The transport roll 2a is connected to a reduction gear 13a via a joint 12a, and the reduction gear 13a is connected to an electric motor 15a via a joint 14a. Similarly, the transport roll 2b is connected to a reduction gear 13b via a joint 12b, and the reduction gear 13b is connected to an electric motor 15b via a joint 14b.

  The transport roll 2a and the transport roll 2b are rotated by the rotation of the electric motor 15a and the electric motor 15b that rotate synchronously, and cooperate with the press rolls 4a and 4b and the press rolls 5a and 5b that rotate following the rotation. Is wound in an S shape and conveyed.

  A brake device 18a is installed on the other side of the electric motor 15a, and the other shaft 16a of the electric motor 15a is housed in the brake device 18a and connected to a disk 19a supported by a bearing 17a. . Similarly, a brake device 18b is installed on the other side of the electric motor 15b, and the other shaft 16b of the electric motor 15b is stored in the brake device 18b and connected to a disk 19b supported by a bearing 17b. ing.

  And in the conveyance path of a steel plate, in order to convey a steel plate smoothly and stably, the steel plate conveyance roll apparatus illustrated in FIG.1 and FIG.2 is arrange | positioned in the appropriate position.

  When stopping the conveyance of the steel plate in the conveyance path of the steel plate, the rotation of the two electric motors (see 15a and 15b in FIG. 2) is stopped, and after the stop, the conveyance roll (see 2a and 2b in FIG. 2) The disc brake (refer to 18a and 18b in FIG. 2) is in an activated state so that the disc brake does not rotate, but if the braking force of the disc brake is reduced due to wear of the brake pad, When a force in the longitudinal direction of the steel sheet (conveying direction or counter-conveying direction) is applied, the transport roll may rotate unexpectedly.

  Further, even when the disc brake is operating normally, a force in the longitudinal direction of the steel plate (conveying direction or anti-conveying direction) may act and the conveying roll may rotate.

  A decrease in the braking force of the disc brake due to wear of the brake pads can be avoided by periodically measuring the wear amount of the brake pads and replacing the brake pads as appropriate. Needs to be performed by disassembling the brake device (refer to 18a and 18b in FIG. 2), which requires a required work time. Therefore, it is difficult to measure the wear amount of the brake pad with high frequency in all brake devices.

  In addition, if the cause of rotation of the drive roll after stopping the motor is not a decrease in the braking force of the disc brake due to pad wear, but a sudden mechanical factor, stop the motor by measuring the amount of pad wear. It is difficult to deal with later rotation of the drive roll.

  Based on this, several methods for monitoring the braking state of the disc brake have been proposed. Patent Document 1 proposes an electronic brake monitoring system and method. Patent Document 2 proposes a method of monitoring a lining gap of a disc brake or a drum brake.

  However, these methods are methods for monitoring (monitoring) the lining clearance of the brake based on the relationship between the movement distance of the brake mechanism and the braking pressure, and not directly monitoring (monitoring) the lining clearance. Therefore, it is not a method that can accurately evaluate the braking condition of the brake.

  Non-Patent Document 1 discloses a GapGun portable gap / level difference measuring device, which is operated by an operator as needed and constantly monitors a disc brake. Therefore, it is not possible to deal with sudden braking mechanism abnormalities.

US Pat. No. 4,937,554 Special table 2011-527266 gazette

GapGun portable gap / step measuring device (http://www.ftr.co.jp/n/products/gapgun/)

  SUMMARY OF THE INVENTION In view of the current state of the art, the present invention provides a disk brake device and a disk brake monitoring method that solves the problem by continuously monitoring the brake state of the disk brake online in a motor disk brake device. The purpose is to do.

  If the present inventors arrange | position the apparatus which can measure the space | interval of a brake pad and a disc, or the space | interval of the brake pad which pinches | interposes a disc in the brake device which stores the disc brake of an electric motor, and the said space | interval is always measured, Based on the idea that the braking condition of the disc brake can be monitored at all times, we have intensively studied a method for solving the above problems.

  As a result, in the disc brake device of an electric motor, if the laser projector and the laser receiver are arranged with the brake pad interposed therebetween, the distance between the brake pad and the disk, or the distance between the brake pads that sandwich the disk can be directly and online. It was found that the braking condition of the brake pad can be constantly monitored by measuring accurately.

  This invention was made | formed based on the said knowledge, and the summary is as follows.

  (1) A disc brake device for an electric motor, wherein a laser projector and a laser receiver are arranged with a brake pad interposed therebetween.

  (2) The disc brake device according to (1), wherein the electric motor is an electric motor that drives a roll for conveying a steel plate.

  (3) A method for monitoring the braking state of a disc brake of an electric motor, wherein a laser projector and a laser receiver are arranged with a brake pad interposed therebetween, and laser light emitted by the laser projector is received by the laser receiver, A disc brake monitoring method, comprising: detecting a distance between a disc and a brake pad based on a light width of a received laser beam and monitoring a braking state of the disc brake.

  (4) When the total distance between the disc and the brake pad exceeds a threshold value determined based on the distance between the disc and the brake pad, a warning sound for prompting replacement of the brake pad is emitted (3) Disc brake monitoring method described in 1.

  (5) The disc brake monitoring method according to (3) or (4), wherein the electric motor is an electric motor that drives a roll for conveying a steel plate.

  According to the present invention, in the disc brake device, the braking status of the disc brake can be constantly monitored online, and the brake pads can be replaced as necessary to ensure the disc brake braking function at all times. Therefore, even if any rotational force acts on the stopped disk, the disk stopped state can always be maintained reliably.

It is a figure which shows the side surface aspect of a steel plate conveyance roll apparatus. It is a figure which shows the upper surface aspect of a steel plate conveyance roll apparatus. It is a figure which shows the basic principle which monitors a disc brake. It is a figure which shows typically the operating state of a disc brake. It is a figure which shows typically the operation cancellation | release state of a disc brake. It is a figure which shows typically another operation cancellation | release state of a disc brake. It is a figure which shows typically another operation state of a disc brake.

  The disc brake device of the present invention (hereinafter also referred to as “the present invention device”) is a disc brake device for an electric motor, wherein a laser projector and a laser receiver are arranged with a brake pad interposed therebetween. .

  The disc brake monitoring method of the present invention (hereinafter also referred to as “the method of the present invention”) is a method for monitoring the braking state of a disc brake of an electric motor, and a laser projector and a laser receiver are sandwiched between brake pads. It is arranged that the laser beam emitted by the laser projector is received by the laser receiver, the distance between the disc and the brake pad is detected based on the width of the received laser beam, and the braking status of the disc brake is monitored. Features.

  Hereinafter, the device of the present invention and the method of the present invention will be described with reference to the drawings.

  First, FIG. 3 shows the basic principle of monitoring the disc brake.

  A brake pad 21a and a brake pad 21b held by the support member 22 are disposed on both sides of the disk 20, and a laser projector 23 and a laser receiver 24 are disposed with the brake pad 21a and the brake pad 21b interposed therebetween. . The laser projector 23 and the laser receiver 24 may be arranged so long as they can project and receive laser light with the brake pad 21a and the brake pad 21b interposed therebetween.

  In FIG. 3, since the brake pad 21a and the brake pad 21b are in an open state (a state where the disc 20 is not pressed), the gap between the disc 20 and the brake pad 21a, the disc 20 and the brake pad 21b, from the laser projector 23. A part of the laser beam 25 having the light width d0 projected toward the gap passes through the gap and is received by the laser receiver 24.

  If the light width of the laser beam 25 received by the laser receiver 24 is d1, the distance between the disk 20 and the brake pad 21a is d1, and if the light width of the laser beam 25 received by the laser receiver 24 is d2, The distance between the disk 20 and the brake pad 21b is d2.

  Even if the brake pad 21a and the brake pad 21b are arranged so that d1 = d2, the amount of wear of the brake pad 21a and the brake pad 21b is not the same, and the brake pad 21a and the brake pad 21b are opened. Are not the same, the width of the laser beam 25 received by the laser receiver 24 is usually d1 ≠ d2, but if (d1 + d2) does not exceed the threshold value, the disc brake will be used in the next brake operation. The braking force can be ensured.

  During the conveyance of the steel plate, the conveyance roll is stopped, the disk brake of the electric motor that drives the conveyance roll is activated, and even if the steel plate is stopped at a predetermined position for the next step, When any force suddenly acts in the longitudinal direction of the steel sheet (conveying direction or anti-conveying direction), if the braking force of the disc brake is not sufficient, the conveying roll rotates and the electric motor rotates, and the position of the steel sheet is at a predetermined position. This will prevent a quick transition to the next step.

  The rotation of the transport roll due to this sudden force also occurs in a steel sheet transport roll device (see FIG. 1) that winds the steel sheet around the two transport rolls in an S shape.

  Therefore, normally, on the assumption that d1 ≠ d2, the distance between the disc and the brake pad is measured, the braking status of the disc brake is constantly monitored, and an unexpected rotational force acts on the motor that is stopped. However, it is necessary to ensure a sufficient braking force of the disc brake so that the electric motor does not rotate even a little.

  For example, in the case of a disc brake of an electric motor that drives a steel sheet transport roll, normally, a brake pad is arranged so that d1 = d2 = 1 mm, and a laser beam with a light width of 30 mm (d0) is directed to the brake pad by a laser projector. To light up.

  Even if the light width of the laser beam received by the laser receiver with a measurement accuracy of 0.01 mm is d1 ≠ d2, if d1 + d2 ≦ 2 mm, the braking force that can prevent the unexpected rotation of the motor by the next brake operation is sufficient. Can be secured.

  An embodiment of the method of the present invention and the apparatus of the present invention will be described with reference to the drawings, taking as an example a disk brake device (d1 + d2 = 2 mm) in which the distance (d1, d2) between the brake pad and the disk is 1 mm.

  FIG. 4 schematically shows the operating state of the disc brake. As shown in FIG. 4, a laser projector 23 and a laser receiver 24 are arranged above and below the brake pad 21. Since the brake pad 21 presses the disk 20 from both sides, the laser light 25 emitted from the laser projector 23, for example, the laser light 25 having a light width of 30 mm is blocked by the brake pad 21.

  In this case, since the laser receiver 24 does not receive the laser beam 25, the arithmetic device 26 transmits a signal of d 1 = d 2 = 0 to the display device 27. In this way, it can be confirmed that the disc brake is operating normally.

  FIG. 5 schematically shows the operation release state of the disc brake. When the operation of the brake pad 21 is released, the laser receiver 24 receives the laser light 25 that is emitted by the laser projector 23 and passes through the gap between the brake pad 21 and the disk 20, and the arithmetic unit 26 The light width (d1, d2, d1 + d2) of the received laser light is calculated and transmitted to the display device 27.

  In this case, since (d1 + d2) is 1.70 mm (≦ 2 mm [initial set value]), the disc brake exhibits a braking force that can prevent the motor from rotating unexpectedly even during the next operation.

  FIG. 6 schematically shows another operation release state of the disc brake. In this operation release state, the display device 27 displays that (d1 + d2) is 2.11 mm. If the target accuracy is 5% and the threshold is 2.10 mm [= 2 mm × 1.05]), (d1 + d2) in the disc brake disengagement state exceeds the threshold.

  When the operation state is shifted from the operation release state to the next operation state, the brake pad 21 cannot press the disc 20 with sufficient pressure from both sides, and the motor rotates when an unexpected torque is applied to the stopped motor. become.

  FIG. 7 schematically shows another operating state of the disc brake. In this operating state, the display device 27 displays that (d1 + d2) is 0.12 mm (> 0 mm). A warning sound for prompting replacement of the brake pad may be generated together with the display.

  In this case, since d1 = 0.12 mm in the operating state of the disc brake, the left brake pad 21 does not press the disc 20 in the drawing. In this operating state, the disc brake does not exhibit a required braking force, so that if the unexpected rotating force acts on the stopped motor, the motor easily rotates.

  The operation release state shown in FIG. 6 and the operation state shown in FIG. 7 are abnormal states of the disc brake. According to the device and the method of the present invention, the operation state and the operation release state of the disc brake are constantly monitored online, and if an abnormal state of the disc brake is found, the brake pad is replaced immediately and the operation of the disc brake is performed. The state and the operation release state can be returned to the normal state.

  In the monitoring of the operation release state of the disc brake shown in FIGS. 5 and 6 and the monitoring of the operation state of the disc brake shown in FIG. 7, the threshold value for determining the abnormal state of the disc brake is 2 mm (= d1 + d2). The threshold value may be appropriately set according to the specifications of the disc brake device.

  Next, examples of the present invention will be described. The conditions in the examples are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

Example 1
In the motor brake device of the transport roll device of the type shown in FIG. 1, the brake pads are arranged so that the distance (d1, d2) between the disc and the brake pads is 1 mm, and a laser beam with a light width of 30 mm is projected. A laser projector and a laser receiver capable of measuring the light width of the received laser beam with a measurement accuracy of 0.01 mm were arranged.

  Every time the brake is operated, the brake pad interval (d1 + d2) is calculated on the basis of the light width (d1, d2) of the received laser beam, and the brake state of the disc brake is constantly monitored by checking with the display device, (d1 + d2 ) Exceeded 2.10 mm (= 2 × 1.05 [accuracy]), the brake pad was replaced.

  As described above, according to the present invention, according to the present invention, in the disc brake device, the braking status of the disc brake is constantly monitored online, and the brake pads are replaced as necessary to change the braking force of the disc brake. Therefore, even if any rotational force is applied to the stopped disk, the disk can be always maintained in a stopped state.

  Therefore, the present invention is suitable not only for a large-capacity electric motor that drives a steel sheet conveying roll, but also as a disc brake device for various types of electric motors, and has high applicability in the steel and machinery industries.

DESCRIPTION OF SYMBOLS 1 Base 1a Base 2a, 2b Transport roll 3 Stand 4a, 4b Press roll 5a, 5b Press roll 6, 9 Roll holder 7, 10 Arm 8, 11 Extending means 12a, 12b Joint 13a, 13b Reducer 14a, 14b Joint 15a, 15b Electric motor 16a, 16b Shaft 17a, 17b Bearing 18a, 18b Brake device 19a, 19b Disc 20 Disc 21 Brake pad 21a, 21b Brake pad 22 Support member 23 Laser projector 24 Laser receiver 25 Laser beam 26 Arithmetic unit 27 Display unit d0, d1, d2 Light width S Steel plate

Claims (5)

  A disc brake device for an electric motor, wherein a laser projector and a laser receiver are arranged with a brake pad interposed therebetween.   The disc brake device according to claim 1, wherein the electric motor is an electric motor that drives a roll for conveying a steel plate.   A method for monitoring the braking state of a disc brake of an electric motor, in which a laser projector and a laser receiver are arranged with a brake pad interposed therebetween, and laser light emitted by the laser projector is received by the laser receiver, and the received laser A disc brake monitoring method, comprising: detecting a distance between a disc and a brake pad based on a light width and monitoring a braking state of the disc brake.   4. The disc according to claim 3, wherein when the sum of the distance between the disc and the brake pad exceeds a threshold value determined based on the interval between the disc and the brake pad, a warning sound for prompting replacement of the brake pad is generated. Brake monitoring method.   The disc brake monitoring method according to claim 3 or 4, wherein the electric motor is an electric motor that drives a roll for conveying a steel plate.

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