JP3025824B2 - Wear monitoring device for clutch friction plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for monitoring the wear amount of a friction plate of a clutch and brake (hereinafter simply referred to as a clutch) such as a cutting machine for cutting a long steel material or the like into a predetermined size. More specifically, the present invention relates to a monitoring device capable of electrically measuring the wear amount of a friction plate without disassembling a clutch mechanism and a brake mechanism.

[0002]

2. Description of the Related Art Since a clutch or a brake device of a cutting machine, which is an object of the present invention, is built in a machine main body, it is necessary to know a wear condition of a clutch or a brake liner in the vicinity thereof. Parts and covers need to be removed. This disassembly work is a heavy work and a work at a high place, which requires a lot of work. It was after considerable wear that the clutch and brake liners became worn and the operation of the machine became unstable.

In order to examine the wear amount of the liner, the thickness of several places of a plurality of liners and the gap between the liners were measured using a vernier caliper, a gap gauge or the like. For the measurement, it was necessary to operate the clutch, and it was necessary to re-attach the previously removed air pipe and the like.

As described above, the only way to know the amount of wear of the liner is to perform a very troublesome overhaul operation. Therefore, based on experience, the overhaul operation is performed at regular intervals, and as a result, the liner Had been replaced with a new one even though some life was still left. Further, as the liner wears and the gap becomes wider, the collision shock at the time of operating the clutch or the brake becomes larger, causing abnormal wear of the liner and shortening the life, causing a sudden stop during production work, It hindered economy and productivity.

[0005]

SUMMARY OF THE INVENTION The present invention makes it possible to easily check the wear amount of the clutch and brake liners of the cutting machine and the malfunction of the machine without carrying out a disassembly inspection work. The purpose is to develop a monitoring device that can be known to improve economic efficiency and productivity.

[0006]

SUMMARY OF THE INVENTION A clutch friction plate wear amount monitoring apparatus according to the present invention operates a crank mechanism via a clutch mechanism from a drive motor for a cutting machine such as a steel material to apply a driving force to a cutting blade. To transmit and drive
In a cutting machine braked by a key mechanism, a rotary limit switch for detecting each time point of the rotation of the crank, an ON of a start switch and a detection signal of the rotary limit switch, the time required between each time of the rotation of the crank. A timer for measuring and displaying time, a monitoring device that compares and calculates a preset time required between each time point of the rotation of the crank and the measured time, and issues an abnormality alarm when the measured time exceeds the set time. An alarm device is provided.

That is, the present invention relates to a clutch / brake (hereinafter, simply referred to as a clutch) device for transmitting or braking a driving force from an electric motor to a load such as a cutting machine, and a crank mechanism driven by rotation of the electric motor. A limit switch for contacting the crank and detecting its rotation and outputting the signal as an electric signal; a clutch mechanism for transmitting a driving force to the crank mechanism; and a pressure member in the clutch mechanism for connecting the clutch. And a starter switch for starting the clutch mechanism, a liner mounted on the power transmission side of the clutch, and a time required for starting the starter switch and operating the crank mechanism. Timer that measures based on the signal and when necessary from the start of the start switch to the operation of the crank mechanism in advance And a warning device for performing an arithmetic operation to compare the crank operation time with the set time and issuing an alarm when the operation time exceeds the set time. Device.

More specifically, a limit switch is installed near the crank mechanism of the cutting machine, and operates in conjunction with the rotation of the crank to detect an instant of rotation of the crank and to detect an instant of rotation of the crank. Outgoing.

The clutch mechanism is provided on the input shaft of the speed reducer located in front of the crank mechanism of the cutting machine, and includes a plurality of disk-shaped friction plates (hereinafter, simply referred to as clutch liners).
A plurality of disk-shaped clutch plates (hereinafter simply referred to as clutch plates), and further, swelled by introducing compressed air to press-connect the clutch liner to the clutch plates. The driving force from the constantly rotating electric motor to the cutting blade is intermittently constituted by an air tube or the like.

The brake mechanism is provided on a side auxiliary shaft portion of a speed reducer located in front of a crank mechanism of the cutting machine.
The structure is the same as that of the clutch mechanism. The clutch mechanism is released after the steel material or the like is disconnected, and then the clutch is operated to brake the coasting operation of the crank mechanism, the cutting blade, and the like, and to stop them at the stop position.

The start switch is a push button switch provided on the console of the cutting machine in the cab for starting the cutting operation of the cutting machine.

A timer is provided in the following monitoring device in the operator's cab. The timer receives an electric signal from the rotary limit switch and operates the clutch mechanism and the brake mechanism for a required time and for one rotation of the crank. Measure the time.
This timer digitally displays the measurement time with an accuracy of 1/100 second, and can set a reference time.If the measurement time exceeds it, it sends out an alarm signal and turns on the abnormality indicator light. It has a lighting function. Also,
The reference setting time can also be posted. The set time is set to the time required for the operation of the clutch unit or the brake unit, which is related to the thickness of the clutch liner of the clutch mechanism or the brake liner of the brake mechanism, and the time required for one rotation of the crank. .

The operating status indicator lamp is attached to the following monitoring device installed in the driver's cab, and displays the operating status of the clutch and brake and the status at the time of the rotation operation of the crank.
It is lit by an electric signal from a tally limit switch, a pressure switch described below, and an electric circuit built in the monitoring device, and displays the operation status of each section of the cutting machine.

The monitoring device is installed in the driver's cab, the timer and the operation status indicator lamp are provided on the surface thereof, and the monitoring device incorporates an electric circuit necessary for controlling the device of the present invention. Monitor the operation status of each part of the machine.
In addition, an abnormal signal is transmitted to the following abnormal alarm device.

An abnormality alarm device is provided in a driver's cab or the like and includes a rotating light and a buzzer, and notifies a driver or the like of occurrence of an abnormality in operation of each section of the cutting machine.

The pressure switch is installed in an air pipe for introducing compressed air to the clutch member and the brake member, and controls that the pressure of the supplied compressed air is a normal value.

[0017]

An embodiment of the present invention will be described below. That is, as shown in FIG. 1, the apparatus 1 according to the present invention is a cutting machine 1 for cutting a long steel material M to a predetermined size, and the cutting machine 1 is a V-belt 3, a flywheel 4, a clutch It is driven via a mechanism 5 and a speed reducer 6. Further, the cutting machine 1 drives a crank mechanism 7 shown in FIG.
9A and 9B are moved up and down to cut a long steel material M into predetermined dimensions.

The clutch mechanism 5 is provided with a liner 12 made of a friction material on the power transmission side with the clutch plate 11 shown in FIG. 2 interposed therebetween. Also, the clutch mechanism 5
An air tube 13 is provided as a member for connecting the clutch plate 11 to the clutch plate 11 and the liner 12 by pressurizing the clutch plate 11 and the liner 12 with the expansion force of the air tube 13 to introduce a clutch. Is connected and the compressed air is removed from the air tube 13 to release the clutch.

The start switch 25 is a push button switch provided at the console of the cutting machine in the cab shown in FIG. 1 and for starting the cutting operation of the cutting machine 1. The solenoid valve 14A shown in FIG. 1 is opened, compressed air is introduced into the air tube 13 in the clutch mechanism 5, the clutch is connected, and the cutting machine 1 starts the cutting operation.
A timer 22 shown in FIG. 4 for measuring the time required to connect the clutch mechanism 5 at the same time when the start switch 25 is pressed.
A starts measuring.

The brake mechanism 15 has the same structure as that of the clutch mechanism 5 and is provided on the side auxiliary shaft of the speed reducer 6, and after the clutch is released, the brake mechanism 15 is compressed via the electromagnetic valve 14B. The air is introduced to brake and stop the coasting operation after the speed reducer.

Thus, the apparatus of the present invention is installed in contact with the crank 8 shown in FIG. 3, rotates in conjunction with the rotation, detects the rotation angle of the crank 8, and outputs it as an electric signal. Providing a tally limit switch 10 and transmitting its output signal to the monitoring device 21 shown in FIGS. 1 and 4;

The timers 22A, 22B and 22C shown in FIG. 4 are provided on the surface of the monitoring device 21 in the cab, and receive the electric signal from the rotary limit switch 10 to receive the clutch mechanism 5 shown in FIG. And the time required for operating the brake mechanism 15 and the time required for one rotation of the crank 8 shown in FIG. 3 are measured and displayed. This timer digitally displays the measurement time with an accuracy of 1/100 second, and can set the reference time. It has the function of transmitting a signal. Also, the reference set time can be posted.

An operation status indicator light 23 shown in FIG. 4 is attached to a monitoring device 21 installed in the cab to operate the clutch mechanism 5, brake mechanism 15, and crank 8 shown in FIG. Displays the operation status of 16A and 16B.

The monitoring device 21 is installed in the driver's cab, has the timers 22A, 22B, 22C and the operation status indicator light 23 mounted on its surface, and has a built-in electric circuit necessary for controlling the device of the present invention. Accordingly, the driver can always monitor the operation status of each mechanism of the cutting machine 1. In addition, an abnormal signal is transmitted to the abnormal alarm device 24 shown in FIGS.

The abnormality alarm device 24 shown in FIGS. 1 and 4 is installed in a driver's cab or the like and is constituted by a rotating light and a buzzer. And the driver can immediately take appropriate abnormal measures such as stopping the subsequent material.

The pressure switches 16A and 16B shown in FIG. 1 are installed in an air pipe for introducing compressed air to the clutch mechanism 5 and the brake mechanism 15, and when the pressure of the supplied compressed air fluctuates, the clutch mechanism 5 and 16B are switched. Since the operation time of the brake mechanism 15 is affected, it is controlled that the pressure is a normal value.

The method of knowing the wear amount of the clutch liner 12 in the clutch mechanism 5 without carrying out the disassembly inspection work by the device according to the present invention is based on a start switch 25 for starting the cutting operation of the cutting machine 1 by the driver. This is done by measuring the time from pressing to when the crank 8 starts to rotate. That is, the start switch 25 is turned on and the solenoid valve 14 is turned on.
A opens and the compressed air is released from the clutch
Air for press-connecting the clutch 11 to the clutch liner 12
The compressed air is introduced into the tube 13, the clutch is connected, the power from the electric motor 2 is transmitted through the speed reducer 6 and the crank mechanism 7, and the crank 8 starts to rotate, and the rotary limit switch interlocked therewith. 10 is a timer for transmitting the electric signal indicating that the crank 8 has deviated from the stop position.
This is done by measuring at 22A.

Therefore, if the clutch liner 12 is worn, the gap between the clutch plate 11 and the clutch plate 11 is widened, so that the clutch connection stroke is increased, and the measurement time of the timer 22A becomes longer as the clutch liner 12 is worn. A graph is created in which the measurement time and wear amount are linked when the liner thickness is new and when the wear limit is reached, and the wear amount of the liner can be known by converting from the measurement time of the timer 22A. .

If the set time of the timer 22A is set to a time corresponding to the liner thickness when the wear limit is reached, the timer 22A
A turns on the abnormal lamp that informs the liner when the thickness of the liner has reached the wear limit, and transmits an alarm signal to activate the abnormal alarm device 24. Incidentally, the thickness of the clutch liner in the present embodiment when the clutch liner is new is 13.0 mm, the thickness at the time of wear limit is 4.0 mm, and the reference set time is 0.1 mm.
If the measured time exceeds this time, the clutch liner is replaced with a new one by the above-mentioned alarm.
Further, since the wear amount of the liner can be known without performing the disassembly inspection work by the device of the present invention, the gap between the liner and the clutch plate can be appropriately adjusted, so that the abnormal wear of the liner is eliminated, and the life thereof is reduced. About 5 times.

The method of determining the wear amount of the brake liner in the brake mechanism 15 is the same as the method of determining the wear amount of the clutch liner. That is, the cutting machine 1 uses the cutting material M
And the rotary limit switch 10 detects that the crank 8 has rotated until the start of the brake operation, activates the brake mechanism 15, and then the rotation of the crank 8 is braked to the stop position. The timer 22B measures the time until the rotary limit switch 10 detects the arrival again. The timer 22B has the same function as the timer 22A for transmitting an alarm. By the way, the thickness of the brake liner in this embodiment when it is new is 17.8 mm, the thickness at the time of wear limit is 4.0 mm, the standard setting time is 2.00 seconds, and the measurement time exceeds this time. If this occurs, the brake liner is replaced with a new one by the above alarm. In addition, the life of the brake liner has been doubled.

Further, in the apparatus of the present invention, the time required for one rotation of the crank 8 is also monitored by the timer 22C. That is, the time from when the crank 8 starts rotating by pressing the start switch 25 to when the crank 8 completes one rotation to reach the stop fixed position is determined by the timer 22
When this time exceeds the reference set time, it is possible to know mechanical failure such as bearing failure of each mechanical part of the shear and insufficient lubrication. The function of the timer 22C is the same as that of the timers 22A and 22B. Incidentally, the reference setting time in this embodiment is 4.00 seconds.

[0032]

As described above, the apparatus for monitoring the wear amount of the clutch friction plate of the present invention can constantly monitor the wear amount of the clutch of the cutter or the liner of the brake without knowing the disassembly work. Since the alarm can be issued, it is not necessary to carry out disassembly and inspection work that requires multiple artificial operations. Since the gap between the liners can be determined from the wear amount of the liner, it can be appropriately adjusted to an appropriate value. The abnormal wear of the liner is eliminated, and the life of the expensive liner is several times longer. In addition, since it is possible to know whether the operating condition of the cutting machine is normal or not, sudden failures are reduced, which greatly contributes to improvement in economy and productivity, and has high industrial utility.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a steel cutting machine and ancillary equipment according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a clutch mechanism and a brake mechanism of a steel cutting machine according to an embodiment of the present invention.

FIG. 3 is a schematic side view of a steel cutting machine according to an embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a layout appearance of a device of a monitoring device and a configuration of an abnormality alarm device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Electric motor 3 V belt 4 Flywheel 5 Clutch mechanism 6 Reduction gear 7 Crank mechanism 8 Crank 9A Upper blade 9B Lower blade M Cutting material 10 Rotary limit switch 11 Clutch plate (Brake plate) 12 Liner 13 Air tube 14A Solenoid valve 14B Solenoid valve 15 Brake mechanism 16A Pressure switch 16B Pressure switch 21 Monitoring device 22A Timer 22B Timer 22C Timer 23 Operation status indicator 24 Abnormal alarm device 25 Start switch

Claims (1)

(57) [Claims] 1. A clutch / brake (hereinafter, simply referred to as a clutch) device for transmitting or braking a driving force from an electric motor to a load such as a cutting machine, and a crank mechanism driven by rotation of the electric motor; And a limit switch for detecting the rotation of the clutch mechanism and outputting the signal as an electric signal, a clutch mechanism for transmitting a driving force to the crank mechanism, and a pressure member in the clutch mechanism for connecting the clutch by press contact. A pressure mechanism, a start switch for starting the clutch mechanism, a liner mounted on the power transmission side of the clutch, and a time required from the start of the start switch to the operation of the crank mechanism based on an output signal of the limit switch. And a device for setting the required time from the activation of the activation switch to the operation of the crank mechanism in advance. And a warning device for performing a comparison operation between the crank operation time and a set time, and issuing an abnormality alarm when the operation time exceeds the set time.