JP2583175Y2 - Bar connection confirmation device of transfer feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar connection confirmation device for a transfer feeder installed in a transfer press.

[0002]

2. Description of the Related Art Conventionally, a transfer feeder provided in a transfer press has a pair of transfer bars in a work transfer direction, and the work is clamped by fingers attached to these transfer bars and is sequentially transferred to each processing station. The long transfer bar is pulled out from the press body together with the mold so that the fingers can be replaced by external setup.
It is divided into multiple parts. Further, a bar connector is provided at a divided portion of the divided transfer bar, and the divided transfer bars are connected to each other by the bar connector, so that the transfer bar can be reliably connected and disconnected at the time of connection. As shown in FIG. 5, a detector c is provided in the vicinity of the bar connector a so that the connection and disconnection of the transfer bar can be confirmed by detecting the operation of the cylinder b. .

[0003]

However, in the case where the detector c for detecting the operation of the cylinder b is provided as in the prior art, the electric wiring is required, so that the price becomes high and vibration during operation is increased. Causes a high frequency of failures, resulting in low reliability. In addition, since fine adjustment for detection must be performed in the press body, workability is poor and maintenance is troublesome. The present invention has been made to solve such a problem, and has as its object to provide a bar connection confirmation device for a transfer feeder which is highly reliable and easy to maintain.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a transfer feeder in which a plurality of divided transfer bars are provided with bar connectors for detachably connecting the respective transfer bars. On the divided surface of the transfer bar, a valve connected to an air supply pipe for supplying air to the bar connector, and a valve for releasing air in the air supply pipe by dividing the transfer bar is provided, and the transfer bar is provided in the middle of the air supply pipe. A pressure switch for checking division and connection is provided.

[0005]

[Operation] With the above configuration, the connection and division of the transfer bar can be reliably confirmed by the signal from the pressure switch.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. In the figure, reference numeral 1 denotes a transfer bar provided on a transfer feeder, which is divided into a plurality of parts so as to be able to be pulled out from a press body (not shown), and a bar connector 2 for separating and connecting the divided transfer bars 1 to each other is provided. Have been. The bar connector 2 has a cylinder 2a at the end of one transfer bar 1a, and a wedge member 2c provided at the tip of a piston rod 2b protruding from the cylinder 2a. A pair of engaging claws 2d provided at the end of the other transfer bar 1b
The transfer bars 1a, 1b
The space can be connected.

The transfer bars 1a, 1b
The valve 3 of the bar connection confirmation device shown in FIG. 4 is provided on the divided surfaces 1c and 1d. The valve 3 has a compression spring 3 in a valve chamber 3a formed in one transfer bar 1a.
b, the valve body 3c urged by the
The valve rod 3d protruding from c is protruded from the division surface 1c to the division surface 1d side of the other transfer bar 1b, and a discharge passage 3e for discharging air in the valve chamber 3a is formed in the valve rod 3d. Have been.

When the transfer bars 1a and 1b are connected, the dividing surface 1d of the other transfer bar 1b abuts against the tip of the valve rod 3d to close the opening of the discharge passage 3e. Is embedded, and the valve chamber 3a of the valve 3 is connected to the air supply pipe 4 for supplying air to the cylinder 2a of the bar connector 2 via the pipe line 5 and at the middle of the air supply pipe 4. A pressure switch 6 is connected so that connection and disconnection between the transfer bars 1a and 1b can be confirmed by the pressure switch 6.

Next, the operation will be described. During operation of the transfer feeder, air at a constant pressure is supplied from the air supply pipe 4 to the cylinder 2a of the bar connector 2, and the transfer bars 1a and 1b are connected by the bar connector 2. State is maintained. When the transfer bars 1a and 1b are connected, the closing member 3d abuts on the valve rod 3f of the valve 3 provided on the dividing surfaces 1c and 1d, and the discharge passage 3e is closed. No air is released and the pressure switch 6 is on.

Next, the transfer bar 1 is divided into the divided surfaces 1c and 1
d, the transfer bars 1a and 1b are separated from each other, so that the discharge passage 3e of the valve rod 3d is opened.
Since the air in the valve chamber 3a is released, the pressure in the air supply pipe 4 decreases and the pressure switch 6 is turned off, and the separation between the transfer bars 1a and 1b is confirmed by the pressure switch 6
Can be confirmed by the signal from. Also, when the connection by the bar connector 2 is loosened for some reason during operation and the contact between the transfer bars 1a and 1b is released, the pressure switch 6 is turned off, and the transfer bar 1 is turned on during operation.
Since it is possible to confirm that the connection between the transfer bars 1a and 1b is loosened, it is possible to prevent an accident such as disconnection of the transfer bars 1a and 1b during operation.

[0011]

According to the present invention, as described in detail above, a pressure switch is provided in the middle of an air supply pipe for supplying air to a bar connector, and the division of the transfer bar is confirmed by the pressure switch. It is not necessary to provide a detector near the bar connector as in the conventional case. As a result, there is no need to wire the transfer bar, so that the cost required for the wire can be reduced, and the reliability can be improved because the detector does not break down due to vibration during operation. Further, a space for leaving the detector near the bar connector is not required, and it is not necessary to enter the press body for adjustment, so that maintenance and management are easy.

[Brief description of the drawings]

FIG. 1 is a plan view showing the vicinity of a bar connector of a transfer feeder according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along the line YY of FIG. 2;

FIG. 4 is a cross-sectional view of the vicinity of a valve of the bar connection confirmation device according to one embodiment of the present invention.

FIG. 5 is an explanatory view showing a conventional bar connection confirmation device.

[Explanation of symbols]

1a, 1b: transfer bar, 1c, 1d: split surface,
2 ... Bar connector, 3 ... Valve, 4 ... Air supply pipe, 6 ...
pressure switch.

Claims (1)

(57) [Scope of request for utility model registration] 1. A transfer bar 1a,
In a transfer feeder provided with a bar connector 2 for detachably connecting each of the transfer bars 1a and 1b to a divided portion of the transfer bar 1b, air is supplied to the bar connector 2 to the divided surfaces 1c and 1d of the transfer bars 1a and 1b. The transfer bars 1a,
The transfer feeder is provided with a valve 3 for releasing air in the air supply pipe 4 by dividing the air supply pipe 1b and a pressure switch 6 for confirming the division and connection of the transfer bars 1a and 1b in the air supply pipe 4. Bar connection confirmation device.