JP3461518B2 - Automatic refueling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic oil supply apparatus, and more particularly to an automatic oil supply apparatus suitable for oil supply to equipment having a plurality of oil supply portions having different oil supply timings and oil supply amounts such as an escalator.

[0002]

As is well known, in addition to a chain for driving steps and a chain for driving a handrail belt, an escalator or the like guides the turn portion of the handrail belt as a portion that needs to be refueled regularly. There is a ring supported by a fixed roller (generally referred to as a "nuclear ring"), and in order to prevent these abrasions and maintain the initial performance, it is always necessary to provide optimum lubrication for each lubrication part. To be done. For example, while a chain requires a refueling operation that continues for a predetermined period of time at a certain time interval, it is sufficient to intermittently apply a small amount of oil to the ring.

As a conventional means for refueling an escalator, a method is provided in which a time limiter is provided to issue a start command to the pump after a certain period of time, refuel for a predetermined time according to the length of the escalator, and then to issue a stop command to the pump. Has been carried out, and the amount of oil to each oil supply portion is adjusted by using a throttle valve provided at the tip of the pump. However, it is necessary to refuel the chain as quickly as possible because it rains directly on escalators that are installed outdoors like recently. It will not be cut and will be overfilled with oil, causing problems such as oil adhering to the handrail belt. Also, since the length of the escalator varies depending on the location where it is installed, it is necessary to adjust the throttle valve each time according to each escalator, and for each installed escalator an appropriate amount of oil is added to the ring part. It is impossible to adjust.

Therefore, as a means for solving the problems caused by the method of adjusting the amount of oil to each refueling portion with a single throttle valve as described above, as a means for solving the problem, a refueling device for a new ring portion and a chain other than the new ring Etc., a method of separately installing oiling devices for oiling etc. is implemented.

[0005]

However, using a plurality of refueling devices and using a plurality of refueling systems in proportion thereto not only increases the cost in terms of equipment,
The installation space for the fueling device is so large that it is not practical, and maintenance is not easy and time-consuming.

The present invention has been made in order to solve the above problems, and its purpose is to provide a single oil supply device for supplying oil to a plurality of parts having different oil supply timings and different oil supply amounts. An object of the present invention is to provide an automatic oil supply device capable of constantly supplying an appropriate amount of oil to each oil supply location.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, an automatic oiling apparatus of the present invention is provided with at least one hydraulic circuit having a throttle valve for constant amount of oil supply to one oil supply main unit having a pump. And from start to stop of the pump
At least one hydraulic circuit provided with a constant amount supply valve for supplying a fixed amount of oil only once is connected between the two.

When the present invention is actually applied to an escalator, the hydraulic circuit having the above-mentioned throttle valve supplies oil to the chain of the escalator, and the hydraulic circuit having the constant amount supply valve supplies oil to the annual ring of the escalator. . And the discharge amount of the fixed amount supply valve is 0.5cc per operation.
In addition to the following, it is desirable to supply the oil discharged from the fixed quantity supply valve via a brush.

[0009]

[Function] On the side where oil is replenished through the throttle valve from the refueling main unit, a fixed amount of oil is continuously supplied to the refueling portion while the refueling drive device (pump) is in operation. Refueling drive device (pump) on the side that is refueled via
During the operation of, the refueling operation of the amount determined by the fixed amount supply valve is performed only once.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Fig. 1 shows a hydraulic circuit for refueling the escalator chain and the ring.
Reference numeral 1 is a refueling main unit, a tank 2 for storing refueling oil, a motor 3 that operates for a predetermined time by automatic control,
It is composed of a pump 4 which is driven by the motor 3 and sucks oil from the tank 2 to pump it, and a pressure adjusting valve 5 which keeps the pressure of the pumped oil constant. Reference numeral 7 denotes a throttle valve, which controls the oil pressure-fed from the refueling main unit 1 through the pipe 13 to a predetermined flow rate and the chain 9 through the refueling pipe 14a.
Supply to.

Reference numeral 8 is a fixed quantity supply valve provided in a pipe line branched from the pipe 13 from the oil supply main unit 1, and the oil discharged from the supply valve 8 is fixed to a fixed roller in the numerical ring 10 via the oil supply pipe 14b. 11 is supplied to the contact portion. Reference numeral 15 is a brush for uniformly applying the oil discharged from the constant quantity supply valve 8 to the ring, and the oil from the supply valve 8 is supplied to this brush 15.

FIG. 2 shows a specific structure of the constant quantity supply valve 8 in FIG. 1. In FIG. 2, the constant quantity supply valve 8 is a piston 23 which operates in the valve body by hydraulic pressure in a pipe 13 connected to one end side. From a piston valve 22 that opens and closes the connection port 26 of the piston 23, a fixed nipple 24 attached to the other end of the valve body and connected to the pipe 14b at the center, and a spring 27 interposed between the fixed nipple 24 and the piston 23. Composed. The fixed amount nipple 24 has a length 25 that defines the stroke 29 of the piston 23 and determines the amount of discharged oil, and the length can be appropriately adjusted by changing the nipple. Further, the spring 27 is reduced when the hydraulic pressure from the pipe 13 is applied, and pushes back the piston 23 and the piston valve 22 when the hydraulic pressure is reduced.

The metering valve shown in FIG. 2 has a single port for discharging oil, but in the case of the escalator's dual ring, there are two dual rings on the upper and lower sides of the escalator. To do so, a two-port type metering valve is used. In addition to this, the metering valve is 1
There are three types, such as mouth, mouth, and mouth, and these may be used properly according to the place of use. Since the oil is distributed according to the number of ports in the multiple-port metering valve, it can be expressed as a metering valve.

Next, the discharge operation of the constant quantity supply valve 8 will be described with reference to FIG. FIG. 2A shows a state before the pump is driven. The piston 23 and the piston valve 22 are pressed against the oil inlet side by the spring 27, and the upper oil sump 21
Is full of oil.

In FIG. 2B, the pump is driven and the pipe 13
Shows the state in which the oil is pumped, and the pressure oil pushes up the piston 23 and the piston valve 22 against the spring 27, thereby pushing the oil in the oil sump 21 to the pipe 14b and supplying it to the oil supply portion. Stroke 2 of piston 23
Even if 9 is completed and a certain amount of refueling is completed, the connecting port 26 between the piston 23 and the piston valve 22 is kept closed due to the pressure from the pipe 13 while the pump 4 is operating.
No more oil is discharged.

FIG. 2 (c) shows a state in which the pump has stopped after one refueling time has ended (the pump has stopped operating for a certain period of time). When the pump stops, the hydraulic pressure in the pipe 13 decreases and the piston 23 and the piston valve 22 are pushed back by the spring 27, the connection port 27 is opened, and the piston 2
The oil in the lower oil sump 28 of No. 3 flows into the upper oil sump 21 and returns to the state of FIG. Therefore, every time the pump is started and stopped, the operations of FIGS. 2A, 2B and 2C are repeated, and a constant amount of oil is discharged in a short time.

In the configuration of FIG. 1, when the motor 3 is operated by a predetermined automatic control, the pump 4 is driven and the oil in the tank 2 is sucked and pumped. The pressure of the oil to be pumped is set by the pressure adjusting valve 5. After the oil having the predetermined pressure is adjusted to a predetermined flow rate by the throttle valve 7 from the oil supply main unit 1, one oil supply pipe 14a is supplied. Is supplied to each refueling portion (chain) for a predetermined time via the. At the same time, for the oil branched from the pipe 13 to another circuit, the constant amount supply valve 8 is operated as described above, and a constant amount of oil is supplied to the oil supply pipe 14b in a short time.
And is supplied to the contact portion of the manual ring 10 with the fixed roller 11 via.

In the illustrated embodiment, first, the operating time of the pump 4 is constant because the operating time of the pump 4 varies depending on the length of the chain 9 other than the numerical ring supplied through the throttle valve 7. I won't. However, the piping 13
If the constant amount supply valve 8 shown in FIG. 2 is installed in the circuit of FIG. 2, the pump 4 is driven and the pressure of the circuit of the pipe 13 rises, so that the pump 4 can be started up regardless of the driving time of the pump 4. Only once, a fixed amount of oil is supplied from the constant quantity supply valve 8 to the manual ring in a short time.

Further, the discharge oil amount per one time of the constant quantity supply valve 8 can be adjusted by changing the stroke 29 of the piston 23 by changing the length 25 of the constant quantity nipple 24. The amount of discharged oil is preferably 0.5 cc or less. If the discharge amount to the manual ring is more than this, there is a possibility that the amount of fuel will be excessive. Moreover,
By attaching the brush 15 to the oil discharge portion at the tip of the oil supply pipe 14b, it becomes possible to apply an appropriate amount of oil to the annular ring uniformly without sagging through the brush.

Although the illustrated embodiment shows an example of application to an oil supply point of an escalator, the present invention is not limited to this, and is applied to, for example, a moving sidewalk chain and a new ring, a conveyor chain and a bearing. Is possible as well. Further, it is needless to say that the present invention can be applied to a plurality of systems that require control of the amount of oil.

[0021]

According to the oil supply apparatus of the present invention described above, the oil supply circuit that supplies oil from the oil supply main unit through the throttle valve is used in combination with the constant amount supply valve to change the oil supply depending on the installation conditions of the equipment to be oiled. It becomes possible to automatically supply an appropriate amount of oil to a place where a minute amount of oil is sufficient, regardless of the operating time of the device, and prevent the adverse effects due to excessive oil supply. In particular, when the present invention is applied to refueling a place such as a nuisance ring of an escalator, an appropriate amount of oil can be always supplied, oil is prevented from adhering to the handrail belt, and reliable lubrication is provided. Further, it is possible to prevent wear of the fixed roller and abnormal noise at the time of rotation, stabilize the performance, improve the maintainability, and provide a highly reliable oil supply device.

[Brief description of drawings]

FIG. 1 is a basic oil supply hydraulic circuit diagram showing an embodiment of an automatic oil supply device according to the present invention.

2A, 2B, and 2C are cross-sectional views showing the structure of a metering valve used in the present invention and its discharge operation.

[Explanation of symbols]

1 Refueling Main Unit 2 Tank 3 Motor 4 Pump 5 Pressure Adjusting Valve 7 Throttle Valve 8 Constant Supply Valve 9 Chain 10 Numerical Ring 11 Fixed Roller 12 Handrail Belt 13 Piping 14a, 14b Lubrication Piping 15 Brush 21 Upper Oil Sump 22 Piston Valve 23 Piston 24 Fixed amount nipple 26 Connection port 27 Spring 28 Lower oil sump

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-3-88695 (JP, A) JP-A-54-60648 (JP, A) JP-A-57-146993 (JP, A) JP-A-53- 32268 (JP, A) JP-A-4-366095 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16N 7/38 F16N 25/00

Claims (3)

(57) [Claims] 1. An oil supply main unit having a pump, at least one hydraulic circuit provided with a throttle valve for supplying a fixed amount of oil, and a fixed amount of oil only once between the start and stop of the pump. An automatic oil supply device, wherein at least one hydraulic circuit provided with a constant supply valve for supplying is connected. 2. The discharge amount of the constant amount supply valve is 0.5 per operation.
The refueling device according to claim 1, which has a cc or less. 3. The oil supply device according to claim 1, wherein the oil discharged from the constant quantity supply valve is supplied via a brush.