JPH05263876A - Chain lubrication device - Google Patents

Abstract

PURPOSE:To detect movement of an endless chain by obtaining electric pulse signals from a sensor continously and to execute necessary oil feeding times, and a necessary oil feed halt time and so on surely by metering a timer in which oil feed halt time. CONSTITUTION:When an interval of electric signals from a sensor 11 is within 30 seconds, an endless chain 4 is judged to be moving, a keying signal is transmitted to an electromagnetic switch type feed valve 6 by synchdronizing with the pulse signal the valve 6 is opened for a time set in a valve openning time set device 16, and lubricating oil is discharged from a nozzle 9 to the pin of the endless chain 4. Lubricating oil is supplied till the feeding times reaches to a value set in a feeding times set device. When the pulse interval is 30 seconds or more, the endless chain 4 is judged to be not moving so as not to be put into a feeding mode. When the set feeding times is completed, the device is put into a halt mode and after completing the halt time which is set in a feeding halt time timer 15, is returns to the feeding mode again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply control device for supplying lubricating oil to an endless chain for a conveyor and other endless chains for transmission without excess or deficiency.

[0002]

2. Description of the Related Art A chain lubrication device for maintaining general lubrication oil, which is fed by a lubrication pump under pressure, from an endless chain of a chain conveyor and maintains its lubricity, has been known. This is because the rotation of the pin or sprocket wheel is detected by the proximity switch so that the lubricating oil is sprayed only on the part where the pin and the link of the endless chain are in contact, and the electromagnetic opening-and-closing type oil supply valve is momentarily opened each time the detection signal is output. Lubricating oil is discharged synchronously with the progress of the chain from a nozzle installed so as to face the endless chain.

[0003]

By the way, in the above-mentioned conventional oil supply apparatus, since it is necessary to synchronize the operation signal of the conveyor (endless chain) with the conveyor operation signal from the conveyor control panel, it is necessary to add to the existing equipment. However, there is a problem in that the wiring is complicated and the wiring is complicated.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] An electromagnetic opening-and-closing type oil supply valve for discharging lubricating oil pressure-fed by an oil supply pump from a nozzle arranged opposite to an endless chain and the contact and separation of a pin of the endless chain are detected. It is equipped with a sensor that outputs an electric pulse signal for each time, a counter that counts the electric pulse signal of the sensor, and a valve controller that includes a refueling frequency setting device and a refueling pause time setting timer. Each time an electric pulse signal is obtained from the sensor, the electromagnetic opening-and-closing type oil supply valve is opened for a predetermined time to discharge lubricating oil until the number of times of refueling is completed, and thereafter an electric pulse signal is continuously obtained from the sensor. The elapsed time is measured only when the refueling time is set, and the electromagnetic open / close type refueling valve is operated until the refueling rest time preset in the refueling time setting timer expires. Is kept in the closed state, it is then repeated those wherein said that the solenoid-operated oil feed valve so as to discharge the lubricating oil tighten opened a predetermined time whenever the electrical pulse signal is obtained from the sensor.

[0005]

[Operation] Since the electric pulse signal is continuously obtained from the sensor to detect the movement of the endless chain and the timer with the refueling pause time set can be timed, the connection with the conveyor control panel etc. Even without doing so, the required number of times of refueling, the refueling suspension time, etc. are executed independently and reliably.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a chain lubrication device according to the present invention. In FIG. 1, 1 is a lubrication unit having a lubrication oil tank, a lubrication pump, a lubrication pressure control valve and the like built therein, and 2 is the lubrication unit. A control box 3 arranged in the above box, 3 is a refueling tube piped from the refueling unit 1, 4 is an endless chain for driving a conveyor (not shown), and the endless chain 4 moves in the direction of the arrow.

An electromagnetic open / close type oil supply valve 6 is provided at the tip of the oil supply tube 3 with a check valve 5 interposed, and a distributor 7 is further connected to the secondary side of the electromagnetic open / close type oil supply valve 6. . Reference numeral 8 denotes a nozzle block in which four nozzles 9 are supported so as to face the contact points of a pin 4a and a link 4b that form an endless chain 4, and each nozzle 9 of the nozzle block 8 is supplied with oil from the distributor 7. A thin tube 10 is provided. Reference numeral 11 is fixed to one side of the endless chain 4 that moves in the direction of the arrow, and the end of the pin 4a of the endless chain 4 is operated by the movement of the pin 4a so as to output an electric pulse signal. It is a proximity switch that is a sensor.

The control box 2 is provided with a counter 12 for counting the electric pulse signal of the sensor 11 and a valve controller 13 for issuing an opening / closing command to the electromagnetic opening / closing type oil supply valve 6. The valve controller 13 is capable of freely setting the required number of refueling operations within a range of 1 to 9999 (usually matching the number of all pins of the endless chain 4) and the refueling frequency setting device 14 and the endless chain 4. Is equipped with a refueling pause time timer 15 capable of setting a time period during which refueling is suspended even within the range of 1 to 999 hours. In addition, a built-in valve opening time setting device 16 that can freely set the time from opening to closing of the valve controller 13 within a range of 0 to 900 milliseconds (this determines the amount of lubricating oil per discharge) is provided. ing.

Next, the operation of the chain lubrication system of the present invention will be described with reference to the flow chart of FIG. The number of refueling times, the refueling pause time timer 15, and the valve open time setter 16 are preset with the number of refueling times, the rest time, and the valve open time, respectively.

First, in step a, it is determined whether or not the interval between the electric pulse signals obtained from the sensor 11 is within 30 seconds. If it is within 30 seconds, it is determined that the endless chain 4 is moving, and in step b. Move to refueling mode. Then, in step c, an opening / closing signal is output to the electromagnetic open / close type oil supply valve 6 in synchronization with the pulse signal obtained from the sensor 11 to open the electromagnetic open / close type oil supply valve 6 for a preset time in the valve open time setting device 16. When the nozzle is opened, the lubricating oil is discharged from the nozzle 9 to hit the pin of the endless chain 4. And
In step d, the number of times of refueling is incremented, and in step e, it is judged whether or not the preset number of times of refueling has reached the number of times of refueling setter 14, and if not, step a
After returning to, this loop is repeated until the number of refueling reaches the set value.

When it is determined in step a that the pulse interval is 30 seconds or more, it is determined that the endless chain 4 is not moving, the refueling mode is not entered, and steps a and e are repeated. When the endless chain 4 starts to move, the fuel supply mode is entered.

When it is determined in step e that the set number of times of refueling has expired, the rest mode of step f is entered, and in step g, the interval of the electric pulse signals obtained from the sensor 11 is separated by 30 seconds. When it is determined that the endless chain 4 is not moving at the interval of 30 seconds or more, the process returns to step f and this loop is repeated. When it is determined that the endless chain 4 is moving, the timer is stepped up in step h, and in step i, the refueling pause timer 15 is caused to determine whether or not the preset timer setting time has expired. It will remain in this rest mode until the set time is completed, and after the rest time has elapsed, it will enter the refueling mode again to resume refueling.

In this device, the pulse signal of the sensor 11 is related so as to cope with the case where the moving speed of the endless chain 4 becomes considerably high and the opening / closing speed of the electromagnetic opening / closing type oil supply valve 6 cannot keep up with this. It also has a timer control mode that discharges lubricating oil at regular intervals.

Further, the amount of lubricating oil discharged from the nozzle 9 can be adjusted by the valve opening time set by the valve opening time setting device 16 and can be freely controlled by the pipe pressure of the lubricating oil sent from the oil supply unit 1. Of course, you can do it. Although the sensor 11 is opposed to the pin of the endless chain 4 in the above embodiment, it may be opposed to the roller in the case of the roller chain, or a dog may be attached to a part of the sprocket so that the sensor detects the dog. However, in short, another method for detecting the pitch of the endless chain 4 can be adopted.

[0015]

As described above, according to the chain lubrication apparatus of the present invention, the movement of the endless chain is detected by the sensor, and the set number of refueling, the refueling suspension time, etc. can be surely executed by the unique judgment. There is no need to wire a signal line from a control panel or the like that controls the operation of the endless chain, and there is a beneficial effect that the installation becomes easy and additional and additional installations can be performed easily and freely.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of a chain oil supply device of the present invention.

FIG. 2 is a block diagram of a control system of the chain oil supply device of the present invention.

FIG. 3 is a flowchart showing the operation of the chain lubrication device of the present invention.

[Explanation of symbols]

 1 lubrication unit 2 control box 3 lubrication tube 4 endless chain 4a pin 4b link 5 check valve 6 electromagnetic opening and closing lubrication valve 7 distributor 8 nozzle block 9 nozzle 10 lubrication thin tube 11 proximity switch 11 sensor 12 counter 13 valve controller 14 lubrication Number of times setting device 15 Refueling pause time timer 16 Valve opening time setting device

Claims (1)

[Claims] 1. An electromagnetic opening-and-closing type oil supply valve for discharging lubricating oil pressure-fed by an oil supply pump from a nozzle arranged opposite to an endless chain and a contact and separation of a pin of the endless chain, and an electric pulse is detected each time. A sensor that outputs a signal, a counter that counts the electric pulse signal of the sensor, and a valve controller that includes a refueling frequency setting device and a refueling pause time setting timer, and the refueling frequency set in advance by the refueling frequency setting device When the electric pulse signal is obtained from the sensor, the electromagnetic open / close type oil supply valve is opened for a predetermined time to discharge lubricating oil until the electric pulse signal is obtained from the sensor, and thereafter, when the electric pulse signal is continuously obtained from the sensor. Only the elapsed time is measured and the electromagnetic open / close type refueling valve is kept closed until the refueling pause time preset in the refueling time setting timer expires. Then, after that, each time the electric pulse signal from the sensor is repeatedly obtained, the electromagnetic opening-and-closing type oil supply valve is opened for a predetermined time to discharge the lubricating oil, and a chain oil supply device.