JPS6113892B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for detecting whether or not a material to be processed by a die is accommodated in a proper position in a press die or the like.

Conventionally, when a workpiece such as a sheet metal is housed in a press die, especially a lower die, etc.,
In order to know whether or not the workpiece is housed in the correct position of the mold, for example, as shown in FIG. A proximity switch b was installed at a location where it could directly sense the approach of the workpiece w when it was housed in the proper position of the lower die a. For this reason, there are restrictions on where proximity switch b can be installed, and the surface of the press die that accommodates the workpiece is curved, making it difficult for the workpiece to be in the correct position when it is set in the press die. Furthermore, there was a drawback that it could not be detected even if the workpiece was a magnetic material.

In view of the above, the present invention provides that no matter what shape the machined surface of the mold has or even if the workpiece is not a magnetic material, when the workpiece is set at the regular position of the mold, the workpiece can be The object of the present invention is to provide a device for confirming the set position of a material in a press mold or the like, which can reliably detect the material to be processed.

Next, the present invention will be explained based on embodiments shown in the drawings.

In FIGS. 2 to 4, the position confirmation device 11 has a pair of side plates 12, 12 fixed perpendicularly to the upper surface of a substrate 13 in parallel. A proximity switch 4 is installed between the side plates 12, 12 to detect when a magnetic material such as metal approaches within a certain distance. Further, on the upper left side of the side plates 12, 12, there is a pair of support plates 14, 14 having elongated holes 14a.
(However, one support plate 14 is not shown.) Projectingly provided, a bracket 15 is fixed to the upper right end of the side plates 12, 12. The swing lever 16 is made of a metal member bent into an obtuse angle.
The bent portions are connected to the long holes 14a, 1 of the support plates 14, 14.
It is rotatably supported by a pin 17 inserted into 4a. This swing lever 16 has its upper end connected to one end of an H-shaped link 18 by a pin 19, and the other end of the link 18 is connected to a pin 19a.
It is connected to the bracket 15 by.

The swinging lever 16 has its bent portion attached to the upper left side of the side plates 12, 12 as described above.
In addition, since the link 18 and the like are attached to the upper end 16a, the upper end 16 is attached to the pin 17.
a is always heavy, and the lower end portion 16b is always light. Therefore, the link 18 is substantially horizontal, and the lower end 16b of the swing lever 16 is always separated from the detection head 4a of the proximity switch 4. When a pressing force in the direction of arrow A (downward) is applied to this lower end 16b (see FIG. 3), the swing lever 16 rotates counterclockwise about the pin 17, and the lower end 16b is pushed to the right in the diagram. Therefore, the pin 17 moves to the right in the elongated hole 14a of the support plate 14, the distance between the pin 17 and the pin 19a becomes shorter, and the connecting pin 19 of the swing lever 16 and the link 18 moves upward. . The lower end 16b is the end of the substrate 13 (the detection head 4
a side), the swing lever 16 and link 1
8 also stops moving.

Next, the implementation of this example will be explained.

In FIG. 5, 20 is the lower die of the press;
An appropriate number of guides 21 are attached to one flange 20a of the upper part of the lower mold 20, and a position confirmation device 11 is installed on the upper surface of the other flange 20b, and the swing lever 16 is moved inside (the guide 21 side) and an appropriate number of them are attached depending on the size of the mold. When the sheet w, which is a workpiece material, is housed in the lower die 20 from above the lower die 20 while being guided by the guide 21 at one end, the other end of the sheet w is at the lower end of the swing lever 16. Push down the part 16b. In this way, the lower end 16b overcomes the weight of the upper end 16a and is pushed down, so the swing lever 16 rotates counterclockwise about the pin 17. When the sheet w is placed in the proper position of the lower die 20, the lower end 16b of the swing lever 16 comes into contact with the tip of the substrate 13. Therefore, the detection head 4a of the proximity switch 4 and the proximity protrusion 16 of the swing lever 16
c becomes the set length D, and the proximity switch 4 detects that the sheet w is stored in the proper position of the lower die 20 and issues a signal. In this way, all the position confirmation devices 1 attached to the lower mold 20
When a signal is issued from 1, the ram of the press (not shown) to which the upper die is attached can be activated by this signal.

Here, in the position confirmation device 11, the hole for supporting the pin 17 of the support plate 14 is an elongated hole, and the pin 1
7 can move within the elongated hole 14a, even if there is some error in the length of the sheet w, the error in the length of the sheet w can be absorbed within the length of the elongated hole 14a, and the sheet w It is possible to detect whether or not the mold is correctly accommodated in the lower mold 20.

Furthermore, a spring or the like may be used instead of the link 18 of the position confirmation device 11.

As described above, the present invention has a chevron-shaped substrate that is attached to the upper surface of the mold laterally from the end position of the workpiece to be accommodated in the press mold, and the upper end, the central bent part, and the lower end. A metal member, the bending portion of which is pivoted to a support portion located above the substrate and on the inside of the mold, and the swing lever having its lower end attached to a workpiece to be accommodated in the mold. A material position confirmation device comprising: a detector having a detection head that detects the approach of the lower end when pressed by the end of the material and rotated to a set position;
The swing lever is movable in a direction perpendicular to the detection surface of the detector within a range that absorbs dimensional errors of the workpiece at its shaft attachment part, and has an upper end that presses the upper end. The lower end is always projected towards the inside of the mold, and when the lower end is pressed by the workpiece, a link is connected that allows the swinging lever to rotate and its shaft attachment to move towards the outside of the mold. By configuring the material position confirmation device, the swing lever can move within the range allowed by the link at its shaft attachment point, and even if there is an error in the length of the workpiece in the detection direction, the error will be eliminated. can be absorbed to reliably detect the position of the workpiece.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional position confirmation proximity switch attached to a press mold, FIG. 2 is a perspective view of an embodiment of the position confirmation device of the present invention,
3 is a front view of FIG. 2, FIG. 4 is an explanatory diagram of the operation of FIG. 3, and FIG. 5 is a perspective view showing the position confirmation device of this embodiment attached to the lower mold of the press. 11... Material position confirmation device, 4... Proximity switch, 4a... Detection head, 16... Rocking lever,
20...Lower mold, w...Work material.

Claims (1)

[Claims] 1 A chevron-shaped metal member consisting of a substrate attached to the upper surface of the mold laterally from the end position of the workpiece to be accommodated in the press mold, an upper end, a central bending part, and a lower end. A swinging lever whose curved part is pivoted on a support part located above the substrate and on the inside of the mold, and a swinging lever whose lower end is pressed by the end of the workpiece accommodated in the mold. and a detector having a detection head that detects the approach of the lower end when rotated to a certified position, the swing lever detects dimensional errors of the workpiece at its shaft attachment part. The detector is movable in a direction perpendicular to the detection surface of the detector within a range that absorbs A material position confirmation device characterized by being connected to a link that allows a swing lever to rotate and a shaft attachment portion of the swing lever to move toward the outside of a mold when pressed by a workpiece.