JPS6032909Y2 - Automatic feeding device for workpieces - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic feeder for a workpiece that automatically feeds the workpiece from one position to another.

Generally, a device that automatically feeds a workpiece pressed by a press machine from above the mold to an external workpiece removal position has a suction hand that can hold the workpiece by vacuum suction, and There is a known device in which the suction hand repeatedly moves up and down and horizontally along one locus.

In other words, this suction hand moves horizontally to above the mold of the press machine, descends to vacuum suction the workpiece on the mold, and then ascends while holding the workpiece by suction, and then removes the workpiece. It moves horizontally to above the workpiece removal position, then descends to release the workpiece at a predetermined workpiece removal position, then rises, moves horizontally, and repeatedly moves above the mold again. There is.

For this reason, a drive mechanism is provided for raising, lowering, and horizontally moving the suction hand to a predetermined position.

By the way, conventionally, as a drive mechanism for raising and lowering the suction hand as described above, a drive mechanism using a cylinder that reciprocates in the vertical direction has been adopted.

However, in a drive mechanism using such a linear reciprocating cylinder, for example, if you try to obtain a sufficient vertical stroke, the cylinder becomes larger, which in turn leads to an increase in the size of the entire device. was there.

Moreover, there is a problem in that the lifting stroke of the hand and the lifting limit position thereof cannot be easily adjusted.

This idea was made in view of the above circumstances, and by configuring the drive mechanism for lifting and lowering the hand that holds the workpiece by a rotation drive section and a crank mechanism section, the device itself can be made smaller. Moreover, it is an object of the present invention to provide an automatic feed device for a workpiece in which the raising/lowering stroke of the hand and the adjustment of its raising/lowering limit position are extremely simple.

An embodiment of this invention will be described below with reference to the drawings.

Reference numeral 1 in the figure indicates a box-shaped base, which is installed on the floor of a factory or the like.

A rotary cylinder (rotary drive unit) 2 is provided above the surface of the base body 1 .

This rotary cylinder 2 is configured to drive a horizontal drive shaft 4 to rotate left and right within a range of 180 degrees by various fluid pressures such as pressurized air selectively introduced from two conduits 3, 3. It has become.

The tip of the drive shaft 4 extends into the base 1, and an eccentric rotary plate (generally referred to as an eccentric plate) 5 is fitted to the tip.

This eccentric rotating plate 5 is connected to the key 6 with respect to the drive shaft 4.
It is prevented from rotating and is prevented from being removed by a screw 7.

In addition, a guide groove 8 is formed along one diameter line of the eccentric rotary plate 5, and within this guide groove 8 is a base of an eccentric pin (generally referred to as 1 eccentric pin) 9. The parts are guided so that they can be moved freely.

Further, an adjustment screw 10 for adjusting the slide of the eccentric pin 9 is attached to the eccentric rotating plate 5.

That is, the adjusting screw 10 has its base end rotatably supported by the eccentric rotary plate 5 in a form along the guide groove 8, and its tip end is screwed into the base portion of the eccentric pin 9.
Based on the rotational operation of its proximal or distal end, the eccentric pin 9
can be moved and adjusted along the guide groove 8.

Note that the adjustment screw 10 is prevented from moving in the axial direction by a flange portion 11 at its base end and a fixing ring 12.

Further, in order to enable rotation of the adjustment screw 10 from the outside, a window 13 is provided on the upper surface of the base 1, and a cover plate 14 is detachably attached to the window 13 from the outside. .

The upper end of a rod 16 is connected to the eccentric pin 9 via a washer 15 so as to be relatively rotatable.

This rod 16 is constructed by connecting an upper rod 17, a connecting body 18, and a lower rod 19, and the reverse threaded portions formed at the upper and lower parts of the connecting body 18 are screwed into the upper rod 17 and the lower rod 19. , the rod 16 itself can be expanded and contracted.

That is, by rotating the intermediate portion of the connecting body 18, the upper rod 17 and the lower rod 19 can be moved relatively closer to each other and separated from each other, thereby adjusting the interval therebetween.

Note that 20 and 20 in the figure indicate upper and lower nuts, respectively, for fixing the expanded and contracted state of the rod 16.

Further, in order to make the rod 16 extendable and retractable from the outside, a window 21 is provided on the back side of the base 1, and a cover plate 22 is detachably attached to the window 21 from the outside.

A fixing pin 24 of an elevating body 23 is rotatably connected to the lower end of the rod 16.

This elevating body 23 is guided by the base 1 so as to be movable up and down.

That is, ID rails 26 having guide grooves 25 extending in the vertical direction are attached to each of both sides of the elevating body 23, and guide grooves 25 extending in the vertical direction are attached to respective parts of the base body 1 facing each guide rail 26. A guide rail 28 having a groove 27 is attached, and a plurality of balls 29 are fitted between the guides i25 and 27 of these two sets of guide rails 26 and 28 so as to be freely movable.

Therefore, the elevating body 23 moves up and down smoothly.

Note that 30 in the figure indicates an adjustment screw for optimally setting the mounting position of the guide rail 28 on the base 1 side.
is screwed to.

The right side of the elevating body 23 in FIG. 3 extends to the outside of the base body 1 from an elongated hole 32 provided on the front side of the base body 1 and extending in the vertical direction.

A cylinder 33 extending in the horizontal direction is supported on the extending portion of the elevating body 23.

This cylinder 33 has two piston rods 34, and the two piston rods 34 are simultaneously driven to expand and contract along the horizontal direction by various fluid pressures such as pressurized air.

A moving body 35 is attached between the two piston rods 34.

Two vacuum suction cups 38 are supported downwardly at the top of the moving body 35 via a first support 36 and a second support 37, 37.

This suction cup 38 vacuum-suctions the upper part of a plate-shaped workpiece, for example, using negative pressure from a vacuum generator (not shown).

Therefore, they threaten the hand 39 that holds the workpiece.

Next, the operation of the above-mentioned component device will be explained.

First, since the elevating body 23 is connected to the rotating cylinder 2 through a so-called crank mechanism, when the drive shaft 4 of the rotating cylinder 2 rotates 1800 times from the state shown in FIG. The elevating body 23 at the upper limit position returns to the lower limit position as shown by the two-dot chain line in the figure.

In this way, the elevating body 23 is moved up and down by the rotating cylinder 2.

Note that since this lifting stroke corresponds to the eccentric distance 1 between the drive shaft 4 and the eccentric pin 9, the lifting stroke can be adjusted very easily from the outside using the adjusting screw 10.

Further, the ascent and descent limit positions of the elevating body 23 can be adjusted very easily by adjusting the expansion and contraction of the rod 16 by rotating the connecting body 18 together with the adjustment screw 10 as described above.

On the other hand, the cylinder 33 horizontally moves the hand 39 between the position shown by the solid line in FIG. 2 and the position shown by the two-dot chain line in the figure by the expansion and contraction of the piston rods 34 and 34.

Therefore, such rotating cylinder 2 and cylinder 33
The hand 39 can be moved back and forth along a trajectory A as shown in FIG.

For example, when the hand 39 descends on the left side of the trajectory A, the suction cup 38, 38 of the hand 39 comes into contact with the workpiece on the die of the press machine, and on the right side of the trajectory A. When the hand 39 descends, the hand 39
When set to move to a predetermined workpiece take-out position, the workpiece can be automatically taken out from the press.

That is, in this case, the suction cup 38.38 suctions and holds the workpiece from the time the suction cup 38.38 comes into contact with the workpiece on the mold until it reaches the predetermined workpiece removal position. Just do it.

By the way, as mentioned above, since it is easy to adjust the lifting stroke of the lifting body 23 and its lifting limit position,
It is easy to adjust the lifting stroke of the hand 39 and its lifting limit position, and therefore the optimum trajectory A of the hand 39 can be set very easily depending on various usage conditions of the device.

The device according to this invention can be applied to a very wide range of applications as an automatic feeding device for various types of workpieces that automatically feeds the workpiece between two positions.

Further, the hand 39 is not limited to a configuration in which the workpiece is held by vacuum suction.

Design changes can be made as appropriate.

As explained above, according to the automatic feed device for a workpiece according to the present invention, the drive mechanism for raising and lowering the hand that holds the workpiece is constituted by a rotational drive section and a crank mechanism section. By making the drive mechanism compact, the device itself can be miniaturized, and since the length of the crank mechanism can be adjusted at specific points, it is easy to adjust the lifting stroke of the hand and its lifting limit position. It has the advantage of being extremely simple.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and Fig. 1 is a front view, Fig. 2 is a plan view, Fig. 3 is a vertical side view, Fig. 4 is an enlarged front view of main parts, and Fig. 5 is a third FIG. 6 is a cross-sectional view taken along the line ■--■ in FIG. 3. FIG. DESCRIPTION OF SYMBOLS 1... Base body, 2... Rotating cylinder (rotating drive part), 4... Drive shaft, 5...
... Eccentric rotating plate, 9... Eccentric pin, 16...
... Tatsudo, 23... Increased IQ body, 39...
··hand.

Claims (1)

[Scope of utility model registration request] a base body, a rotary drive unit provided on the base body and having a drive shaft along a horizontal direction, an eccentric rotary plate having an eccentric pin attached to the drive shaft and slidably adjustable along one radial line; a rod that is relatively rotatably connected to the eccentric pin and can be adjusted for expansion and contraction; an elevating body that is movably guided by the base and relatively rotatably connected to the lower end of the rod; and the elevating body is horizontally movable. and a hand capable of holding the workpiece, the hand holding and automatically feeding the workpiece by lifting and lowering and horizontal movement of the hand, and adjusting the slide of the eccentric pin and extending/contracting the rod. An automatic feeder for a workpiece, characterized in that the lifting stroke of the hand and its lifting limit position can be adjusted by adjustment.