JPS6124000Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermittent oil supply system that utilizes pressure oil from a continuous oil supply system installed in a press machine or its peripheral equipment.

Examples of locations that require intermittent lubrication include balance cylinders, air duct cylinders, etc.; unlike rotating shafts, these locations do not require continuous lubrication, and are more efficient in terms of oil recovery. Continuous refueling is inconvenient.

Conventionally, in order to supply oil to such parts, an intermittent oil supply system that operates a manual pump intermittently was installed separately from the continuous oil supply system, and the system was often operated manually by the operator when necessary. However,
It also had the drawback of forgetting to refuel due to the cumbersome operation.

The present invention was devised to solve this problem, and will be described below based on one embodiment of the present invention.

In Fig. 1, the present invention is configured to supply oil to intermittent oil supply points using a type of check valve that opens and closes depending on the balance between the oil pressure in the continuous oil supply circuit, the gravity acting on the check member, and the spring force. It is becoming.

In other words, the oil in the oil tank 1 is supplied to the oil supply pump 2.
is fed to the distribution valve 3 by. The oil exiting the distribution valve 3 passes through a pipe 4 and is fed to a continuous oil supply location, for example, a rotating shaft portion. On the other hand, the parts that require intermittent lubrication, in this embodiment, the balance cylinder 9 and the distribution valve 3
A kind of check valve is installed in the oil supply pipe between the two.

A piston 10 is installed in the balance cylinder 9, and its piston rod 11 is normally connected to a slide portion of a press machine, and serves to pull up the slide of the press machine by the action of pressurized air supplied to the opening 9a of the balance cylinder 9. ing.

The sealing gasket incorporated in the piston 10 slides within the balance cylinder 9 when the slide of the press moves up and down, and therefore requires oiling.

In FIG. 2, the valve body 6 is provided with an oil chamber 6a, and a check member 7 is incorporated therein, and the check member 7 contacts the sealing surface 6b of the valve body 6 to close the oil supply circuit from the distribution valve 3 side. shall be. An elastic member 8 is also incorporated into the valve body 6 and applies a force in the direction of lifting the check member 7 and separating it from the sealing surface 6b.

The effect will be explained below.

Since the oil supply pump 2 is in operation while the press machine is in operation, the oil pressure in the oil supply circuit 5 increases, and the check member 7 comes into contact with the sealing surface 6b, closing the oil supply circuit. In this state, the balance cylinder 9 is not supplied with oil.

Press operations are suspended during lunch breaks or when the day's work is completed.

At this time, in FIG. 3, when the oil pressure in the oil supply circuit drops to a certain low pressure, the check member 7 is lifted by the elastic member 8, the seal surface 6b opens, and the oil in the oil chamber 6a flows into the balance cylinder 9.

When the press operation is restarted, there is a slight gap between the check member 7 and the inner wall of the oil chamber 6a, so
Oil resistance occurs, the oil pressure increases, and the check member is pressed against the sealing surface, so that the oil passage is closed.

Since the present invention has the above-described configuration, the press is refilled each time the press operation is stopped, so there is no need to forget to refuel, and there is no need to provide a manual intermittent lubrication device as in the past.

[Brief explanation of the drawing]

Figure 1 is the overall circuit diagram, Figure 2 is a sectional view of the main parts,
FIG. 3 is an explanatory diagram of the operation. 1 is an oil tank, 2 is an oil supply pump, 3 is a distribution valve, 4 is a pipe, 5 is a pipe, 6 is a valve body, 7 is a check member, 8 is an elastic member, 9 is a balance cylinder, 10 is a piston, 11 is a piston rod It is.

Claims (1)

[Scope of utility model registration request] In a device that uses pressure oil from the distribution valve of a continuous lubrication device installed in a press machine or its peripheral equipment to provide intermittent lubrication to a location that requires intermittent lubrication, the distribution valve and the location that requires intermittent lubrication are connected. A check member that closes the oil supply circuit from the distribution valve side, an elastic member that biases the check member toward the distribution valve side, and the check member are accommodated in the piping, which has an inner diameter slightly larger than the outer diameter of the check member. 1. An intermittent lubrication device, characterized in that it is provided with a valve having an oil chamber and performs intermittent lubrication every time the operation of the continuous lubrication device is stopped.