JPH0243533Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an attachment for conveying a press work into and out of a press die.

<Prior Art> As shown in FIG. 6, a conventional attachment for loading and unloading a press workpiece, that is, a panel into a press mold, has a shaft-shaped attachment body 1 with an attachment body 1 attached to the tip end thereof. Fix the leg shaft 2 that intersects the axis of the
Attach the vacuum cups 3 facing downward on both ends of the
It has a structure in which it is connected to a vacuum device via a vacuum hose 4.

<Problems to be solved by the invention> The above-mentioned conventional attachment sucks the panel with the vacuum cup 3 and inserts it into the press mold and takes it out. If there is a misalignment or the panel set angle is different, in order to correct the misalignment of the panel center on the input side at the time of loading, or to adjust the posture to match the angle, it is necessary to install a guide on the mold to regulate it, or to use a special posture. This is handled by installing a separate change device.

The present invention solves the above-mentioned conventional problems by allowing the attachment itself to change the panel posture.

<Means for Solving the Problems> In order to solve the above-mentioned conventional problems, the present invention provides a rotatable first sleeve at the tip of a shaft-shaped attachment body that can be moved to a workpiece conveyance location. A support shaft is fixed to this first sleeve with an axis parallel to the axis of the attachment body overhanging one side of the attachment body, and this support shaft is used as a fulcrum to maintain the original position. A stopper is provided on the attachment body to urge the first sleeve in the upward rotation direction with a spring and to restrict the rotation range of the first sleeve at the original position at the upward rotation end, and the second sleeve is rotatably fitted to the support shaft; A stopper for regulating the rotational range of the second sleeve is provided on the support shaft, and a spring for retaining the second sleeve is provided for pivoting and biasing the second sleeve to a position where the rotational range is restricted by the stopper. A leg shaft that is perpendicular to the axis of the support shaft and has different lengths on the left and right sides around the support shaft is fixed, and downward vacuum cups are attached to both ends of this leg shaft.

<Function> The present invention utilizes the weight of the workpiece attracted by the vacuum cup, and uses the center of gravity of the workpiece during transportation to move the workpiece's feed reference center using the center of rotation of the first sleeve and the center of rotation of the second sleeve as fulcrums. This automatically changes the posture of the workpiece to the one it was placed in without shifting it. Furthermore, it is also possible to arbitrarily change the deviation of the reference center as necessary.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5. In Figures 1 and 2, 10
is a shaft-shaped attachment body, which is moved by a known actuating device (not shown) to convey the workpiece.
A first sleeve 11 is fitted onto the distal end of the attachment 10 so as to be rotatable about the axis of the attachment body 10. Further, an arm 23 extending in an axial direction perpendicular to the axis of the attachment body 10 is fixed to the first sleeve 11, and the support shaft 12 is overhanged on the tip of this arm 23 with an axis parallel to the axis of the attachment body 10. to be fixed. A second sleeve 1 is attached to this support shaft 12.
3 is fitted rotatably around the axis of the support shaft 12.

The first sleeve 11 is given a turning force by the original position holding spring 14 to urge the support shaft 12 in the upward turning direction, and has a notch 15 provided in the circumferential direction in the first sleeve 11 and an attachment main body 10. The rotation range of the first sleeve 11 is regulated by a stopper pin 16 protruding in the radial direction.

Similarly, a turning force is applied to the second sleeve 13 in the same direction as the first sleeve 11 by the original position holding spring 17, and the rotation range of the second sleeve is restricted by the notch 19 and the stopper pin 18. has been done.

Further, leg shafts 20a, 20b are fixedly provided to the second sleeve 13, and are perpendicular to the axis of the support shaft 12 and have different lengths on the left and right with the support shaft 12 as the center. A downward-facing vacuum cup 21a, 21b is attached to the tip. In FIG. 1, reference numeral 22 denotes a vacuum platform for connecting the vacuum cups 21a, 21b and a vacuum device (not shown). Further, the springs 14 and 17 for holding the original position have a spring force that is weaker than the weight of the workpiece W.

Next, the operation of the above configuration will be explained with reference to FIGS. 4 and 5. The rotation of the first sleeve 11 is restricted by the original position holding spring 14 to the original position rotation end by the notch 15 and the stopper pin 16, and the support shaft 12 is located upward via the arm 23. Further, the rotation of the second sleeve 13 is restricted by the original position holding spring 17 to the original position turning end by the notch 19 and the stopper pin 18. In this state, the vacuum cups 21a and 21b are brought into contact with the workpiece W to attract it, as shown by the dotted line in FIG. 4 and in FIG. 5A. Thereafter, when the attachment main body 10 is raised, the weight of the workpiece W is increased by each of the springs 14 and 1 for holding the original position, as shown in FIG. 5B.
7, the support shaft 12 pivots downward about the axis A of the attachment body 10 via the arm 23 and the first sleeve 11, and
The support shaft 12 and the second sleeve 13 rotate relative to each other about the axial center of the support shaft 12 as a fulcrum B. Then, when the workpiece W is lifted, the notch 15 of the first sleeve 11
hits the stopper pin 16, and the support shaft 12 relative to the attachment body 10 is rotated to the lowest end and regulated. Further, since the center of gravity G of the workpiece W is shifted toward the long leg shaft 20a side with respect to the fulcrums A and B, the second sleeve 13 rotates on the support shaft 12 due to the center of gravity G, and the long leg shaft 20a side descends. The change in the posture of the workpiece W is completed when the notch of the second sleeve 13 hits the stopper pin on the shaft 12 and is regulated in balance with the weight on the short leg shaft 20b side. This change in the posture of the workpiece W is such that the reference center C of the workpiece W is located at the feed reference center D of the workpiece W, as shown by the solid line in FIG. 4 and C in FIG. It is something.

<Effects of the invention> As described above, according to the invention, when a workpiece is loaded into a press mold, the workpiece posture can be automatically changed to match the angle of the input side while being transported by using the weight of the workpiece itself. Because there is no input error,
This improves productivity and eliminates the need for a dedicated attitude change device, resulting in energy savings and reduced maintenance costs.
Furthermore, by adjusting the posture change stopper, the feed center of the workpiece can be arbitrarily set according to the press die, so there is no need to modify the conventional press die, and it is possible to feed the workpiece. Reduction in remodeling costs can be achieved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the present invention, Fig. 2 is a detailed view of the part shown in the direction of the arrow in Fig. 1, Fig. 3 is a view in the direction of the arrow in Fig. 2, and Fig. 4 is an explanatory diagram of changing the posture of the workpiece according to the present invention. , FIGS. 5A, B, and C are explanatory diagrams of the workpiece posture changing process according to the present invention, and FIG. 6 is a perspective view of a conventional attachment. DESCRIPTION OF SYMBOLS 10... Attachment body, 11... First sleeve, 12... Support shaft, 13... Second sleeve, 14... Original position holding spring, 15...
Notch, 16... Stopper pin, 17... Spring for maintaining original position, 18... Stopper pin, 19...
...Notch, 20a, 20b...Leg shaft, 21a, 21
b...Bakyumkatsupu.

Claims (1)

[Scope of utility model registration request] A first sleeve is rotatably fitted to the tip of a shaft-shaped attachment body that can be moved to a workpiece transfer location, and a support shaft is attached to the first sleeve along an axis parallel to the axis of the attachment body. The first sleeve is fixedly overhanging to the side, and this support shaft is biased in the upward swing direction by a spring for maintaining the original position with the attachment body as a fulcrum, and the rotation of the first sleeve is performed at the original position at the end of the upward swing. A stopper for regulating the rotation range is provided on the attachment main body, a second sleeve is rotatably fitted on the support shaft, a stopper for regulating the rotation range of the second sleeve is provided on the support shaft, and the rotation range is regulated by the stopper. The second sleeve is provided with a spring for holding the second sleeve in its original position, and the second sleeve has a leg shaft that is perpendicular to the axis of the support shaft and has different lengths on the left and right sides about the support shaft. An attachment for transporting press workpieces, which is fixedly mounted and has downward vacuum cups attached to both ends of the leg shaft.