JPS6118078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an intermittent automatic lubrication system that is most suitable for use in moving bodies such as conveyors, and in particular an intermittent automatic lubrication system that can reliably supply the minimum amount of lubrication to the parts of the chain that require lubrication. Regarding. As is well known, a conveyor uses a series of drive chains, and in order to prevent wear on the links of these drive chains and maintain the initial performance of the conveyor, it is necessary to Refueling is required. Continuous lubrication methods such as flowing lubrication and continuous spray lubrication are known as this lubrication method. Although this type of continuous lubrication method makes it possible to lubricate all link parts, it is also possible to lubricate areas other than the link parts. This causes problems such as oil dripping and oil loss due to excessive oil supply. In order to solve the problems of the continuous lubrication method mentioned above, an intermittent lubrication system has recently been developed that lubricates each link at the same time.However, with conventional timing lubrication systems, the process starts from detecting the link to lubrication. There is a large time error in the series of lubrication operations, and it is difficult to adjust the timing of lubrication due to differences in chain movement speed and chain pitch. In many cases, it is impossible to refuel every tank. In addition, a timing oil supply system that introduces air, which is conventionally seen in spray and mist methods, has been considered, but this system also has the same problems as mentioned above, as well as the fact that the oil is dispersed. Therefore, a reliable lubrication effect cannot be expected because the working environment deteriorates due to oil scattering and it is impossible to inject oil to the pins inside the chain links due to the oil supply system. Under these circumstances, conventionally, lubricating drive chains of conveyors and the like often relied on manual labor, which was a major hindrance to improving the efficiency of lubricating operations. The present invention has been made in order to solve the above problems, and its purpose is to automatically apply the minimum amount of oil intermittently only to the parts of the moving body that require refueling during the operation of a moving body such as a conveyor. An object of the present invention is to provide a timing intermittent automatic lubrication device that can supply lubrication at high speed and has a high lubrication effect. Another object of the present invention is to provide intermittent automatic lubrication at a timing that allows refueling from a direction suitable for the shape of the moving object, that is, from any direction in response to changes in the shape of the moving object, and that is easy to operate and reliably lubricate. The goal is to provide equipment. The automatic oil supply device of the present invention to achieve these objects basically includes a post-discharge type distribution valve for supplying a constant amount of oil to a plurality of points to be oiled, and the distribution valve and a pressure oil supply source. It consists of a switching valve installed between the refueling target, a detection device that detects when a moving object passes through a refueling target point, and a counter that counts the number of detected refueling target points in order to simultaneously refuel multiple refueling target points. It is characterized by what it did. The present invention will be explained below based on embodiments shown in the drawings. FIG. 1 shows the basic lubrication system of the timing intermittent automatic lubrication system according to the present invention. Three oil discharging nozzles are installed so as to point toward the target points of oil supply, that is, the link parts, and the nozzles 2 are constructed to be able to accurately supply oil to the required locations. 3 is a distribution valve of the discharge type after distributing and supplying a fixed amount of oil to the nozzle 2; 4 is an oil supply source, such as a pump, for supplying the oil under pressure to the distribution valve 3; A solenoid switching valve 8 is interposed between the two.
The switching valve 8 and the distribution valve 3 are connected to the conduit 10 by the conduit 9.
The switching valve 8 and the pump 4 are connected to each other by the switching valve 8 and the pump 4, respectively. Reference numeral 6 denotes a detection device for detecting a refueling target point (link portion) installed at the front of the nozzle 2 in the vicinity of the chain 1, and it is preferable that the detection device 6 uses a non-contact type such as a photoelectric switch. Reference numeral 7 denotes a counter electrically connected to the detection device 6 and the electromagnetic switching valve 8. The counter 7 counts the points to be refueled by the detection device 6. In this example, when three (3) points to be refueled are counted, a refueling operation command is issued to the electromagnetic switching valve 8. Unlike the conventional method of lubricating each link, the device shown in Fig. 1 detects and counts the passage of chain links, and uses a counter to read the number of links that can be followed by a series of lubricating operations. The content is to simultaneously supply oil to multiple link parts when preparations for the oil supply operation are completed. In this way, multiple points to be refueled are detected and counted, and the multiple points (links) to be refueled are refueled at the same time by counting up. This is because of the movement speed of the chain. This is because, in many cases, it is operationally impossible to refuel once, and if multiple link parts are refueled at the same time, there will be more time available. Of course, the number of link parts to be oiled simultaneously is not limited to the illustrated example, and can be arbitrarily selected from two to four or more. As shown in FIG. 2, the structure of the distribution valve 3 includes an oil supply hole 11 communicating with a pipe line 10 from the pump 4, a discharge hole 12 communicating with the nozzle 2, and a metering chamber 1.
3 are provided with a valve 14 made of an elastic body sandwiched therebetween. The metering chamber 13 is used to temporarily store oil from the oil supply hole 11, and a piston 16 is installed on the upper part thereof via a spring 15. These oil supply holes 11 and discharge holes 1
2. Due to the arrangement of the metering chamber 13 and the valve 14, when pressure is applied from the pump 4, oil pushes open the valve 14 from the oil supply hole 11 (solid line position) and is fed into the chamber 13, and the spring 15 piston 16 against the pressure of
is stored in the chamber 13 while pushing up.
On the other hand, when the pressure from the pump 4 is cut off, the oil stored in the chamber 13 is pushed out to the discharge hole 12 by the expansion of the spring, pushing the valve 14 to the left (the chain line position), and is discharged from the nozzle 2. I will do it. The electromagnetic switching valve 8 is used to operate the discharging operation of the distribution valve 3, so that the series of lubrication operations follows the movement of the chain, ensuring instantaneous lubrication to the link parts. becomes possible. Next, the operation of the apparatus shown in FIG. 1 will be explained. When supplying oil to the chain 1, oil pumped by the pump 4 passes through the electromagnetic switching valve 8 in the illustrated state from the conduit 10, passes through the conduit 9, and enters the distribution valve 3. As described above, the oil supplied to the distribution valve 3 is stored in the metering chamber 13 by opening the valve 14 from the oil supply hole 11 and pushing up the piston 16. The detection device 6 detects and counts the number of moving chain links passing through, and when the number of links reaches the number set in the counter 7, an operation command is sent to the electromagnetic switching valve 8, and the switching valve 8 switches. When the pressure changes, the pressure inside the pipe line 9 is instantly depressurized and the pressure drops to atmospheric pressure. As a result, the oil in the metering chamber 13 of the distribution valve 3 is transferred to the valve 14 by the repulsive force of the spring 15.
is pressed down, and the oil is instantly discharged from the nozzle 2 through the discharge hole 12 to the point to be refueled. During this time, the pump 4 is operating continuously, so the pressure inside the pipe line 10 is rising, and when the electromagnetic switching valve 8 returns (it automatically returns after a predetermined period of time has passed after operation), oil is pumped into the pipe line 9 again. Then, the oil is stored in the metering chamber 13 of the distribution valve 3 for the next oil supply, and the oil supply is repeated in synchronization with the passage of the link part by the same operation as described above. For example, the link parts A, B, and C to be refueled are detected, and the three points A, B, and C are refueled simultaneously upon count-up. Next, oil is supplied to D, E, and F at the same time by the same operation. In the present invention, the amount of oil discharged per time/per location is
The oil is supplied at a constant rate of 0.01 to 0.4 cc (the discharge amount can be adjusted by changing the strength of the spring, for example), and the oil is supplied to the target point through a nozzle with a nozzle hole diameter of 0.3 to 1.0 mm. By doing so, strong directivity can be imparted to the discharged oil.
Therefore, in the present invention, reliable lubrication is always possible even when the lubrication direction is changed, and the optimum lubrication direction can be adopted depending on the shape of the chain (for example, lateral lubrication is optimal for trolley conveyors). , it is possible to inject the necessary minimum amount of oil to the inside of the chain link part without waste. In addition, the reason why the amount of discharged oil was specified to be 0.01 to 0.4 cc/time in the above is because below the lower limit, the lubricating effect cannot be expected much.
This is because if the upper limit is exceeded, it becomes excessive and oil drips, etc., resulting in increased waste. In this way, problems caused by the length of the pipes in the oil supply system can be avoided when the metering chamber 13 of the distribution valve 3 is pumped from the pump 4 through the pipes.
Since this is an internal oil storage operation, it can be solved by counting the number of links until this oil storage operation is completed, and the discharging operation of the distribution valve is performed independently for each port by the repulsive force of the spring. This eliminates the difference in refueling time due to the number of holes. Furthermore, by using an electromagnetic switching valve, which has better response than mechanical devices, for the depressurization mechanism for the discharging operation of the distribution valve, instantaneous depressurization is possible, making refueling operations quick and reliable. can be done. In addition, by introducing a non-contact switch such as a photoelectric switch to the detection device of the chain link, malfunctions due to mechanical failure of contact switches such as limit switches used in conventional timing lubrication systems are eliminated, and Intermittent automatic lubrication with long life is possible. Furthermore, the detection device may be installed at any position in front or behind the nozzle, and even if it does not detect the chain but detects it by the teeth of the sprocket,
Alternatively, another detection device may be used, such as a disk having the same shape as the sprocket, which is mounted coaxially with the sprocket and detected by the teeth. As explained above, the lubrication device according to the present invention makes it possible for the first time to supply small quantities of timing lubrication, which had been considered difficult, and can be expected to have an excellent lubrication effect that is effective in preventing chain wear and extending its life. It is something. In addition, the oil has strong directivity, so no matter what shape the chain is in, there are no restrictions on the direction of oil supply, making it possible to reliably supply the minimum amount of oil inside all links from the optimal direction while the conveyor is operating. This eliminates the harmful effects of over-lubrication and oil scattering. Next, embodiments of the present invention will be described. Example (1) Operating conditions Type of conveyor to be lubricated: Power and free conveyor for conveying wire Conveyor speed: 18.4 m/min Chain pitch: 6 inches Points to be lubricated: 8 link nodes/times Number of times to lubricate: 3 times/day (1 time) (1 revolution of conveyor) Oil type: Mitsubishi Diamond 115 Pump discharge rate: 0.3/min Pump discharge pressure: 15Kg/cm ² Solenoid switching valve operating time: 0.3 seconds ON Distribution valve type: Piston type rear discharge distribution valve Discharge rate: 0.1 cc/1 time/1 mouth Nozzle hole diameter: φ0.5 Number of nozzles: 8 Nozzle installation direction: Horizontal forward (2) Results (comparison with conventional equipment) [Table]

[Brief explanation of the drawing]

FIG. 1 is an explanatory layout diagram showing a specific example of the oil supply device according to the present invention, and FIG. 2 is a sectional view showing the structure of the after-discharge type distribution valve in FIG. 1. 1...Chain, 2...Nozzle, 3...Distribution valve, 4...Pump, 9, 10...Pipeline, 6...Detection device, 7...Counter, 8...Solenoid switching valve,
11... Oil supply hole, 12... Discharge hole, 13... Metering chamber, 14... Valve, 15... Spring, 16... Piston.

Claims (1)

[Claims] 1. A post-discharge type distributing valve having a metering chamber that distributes a fixed amount to each nozzle directed to a plurality of refueling target points of a moving object, connects to a pressure oil supply source, and enables oil storage and instantaneous discharge, and the distribution valve. A switching valve provided between the valve and the pressure oil supply source, a detection device that detects a refueling target point that the movable body moves, and a preset count number that counts the refueling target points detected by the detection device. A timing intermittent automatic oil supply device for a moving body, comprising a counter configured to operate the switching valve according to the timing and simultaneously discharge oil from each of the nozzles.