JPH0372535B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a workpiece conveyance device, and in particular, to a workpiece conveyance device that moves a workpiece placed in a horizontally misaligned state from a predetermined working position to its proper position on a conveyance path. The present invention relates to a workpiece transport device that can transport a workpiece after adjusting its position.

2. Description of the Related Art For example, in the past, when a workpiece was to be assembled into a main body of an automobile, a device as shown in FIG. 6 was used to transport and assemble the workpiece. In the drawings, reference numeral 1 denotes a workpiece to be assembled into the main body of an automobile, and a bent portion 2 is formed on one side edge of the workpiece 1, as shown in FIG. 3 is a conveyor, and this conveyor 3 is, for example, an endless belt 5 wrapped around rotating rollers 4a and 4b. Reference numeral 6 denotes an inverted rotation jig installed near the main body assembly line, and this rotation jig 6 is installed at the upper end of the leg 7 so that it can be separated. Reference numeral 8 denotes a device for conveying the workpiece 1 between the conveyor 3 and the inverted rotating jig 6. As shown in FIG. At 9,
Suction pipes 11, 11 with suction cups 10, 10 attached to their lower ends are mounted so as to be vertically movable, and
A plurality of guide rods 1 each having a curved portion 12 at its tip.
3 are vertically mounted on the mounting base 9 and arranged on both sides of the suction pipe 11, and the tip curved portion 12 of the guide rod 13 is expanded outward. The guide rod 13 moves the workpiece 1 suctioned by the suction cups 10, 10 onto the workpiece mounting surface of the inverted rotating jig 6.
This is to correct the position to an appropriate position corresponding to a.

Then, when assembling the work 1 to the main body moving on the assembly line, the work 1
A group of works 14 in which workpieces are stacked in a plurality of stages is placed on the conveyor 3 at a fixed pitch and is conveyed from the carry-in end 15 toward the carry-out end 16. At this time, since the work 1 has a bent portion 2 formed on one side edge,
The upper workpieces 1 are stacked in a horizontally shifted manner. When the first group of works 14 on the conveyor 3 is located below the suction pipes 11, 11 located at the movement start position a of the device 8, the suction pipes 11, 11 are lowered, and as shown in FIG. As shown, the uppermost workpiece 2, which is horizontally displaced from the guide rod 13 by a predetermined distance l, is placed in the suction cups 10, 10 on which the suction force is applied.
It is adsorbed by. Work 2 is suction cup 10,10
When the workpiece 2 is sucked, the suction pipes 11, 11 rise, and during this rising process, the workpiece 2 is pushed in the horizontal direction by the guide rod 13, as shown in FIG. 9, and the workpiece 2 is corrected to an appropriate position. Thereafter, the suction pipes 11, 11 once stop at the rising end and then move to the movement end position b. At this movement end position b, the suction pipes 11, 11 are lowered as shown in FIG. and,
When the workpiece 2 leaves the suction cups 10, 10,
The suction pipes 11, 11 are at the original movement start position a
Return to , and repeat the same operation.

Problems to be Solved by the Invention According to the conventional work transfer device 8 described above, since the workpiece 1 is sucked by the suction cups 10, 10, the workpiece 1 is pressed horizontally by the guide rod 13 to be properly When the suction cup 13 is corrected to a proper position, the suction cup 13 is elastically deformed and bent greatly as shown in FIG. Therefore, the workpiece 1 is held at a proper position as long as the position is regulated by the guide rod 13, but at the end of movement position b, the suction pipes 11, 11 are lowered, and the restriction of the guide rod 13 on the workpiece 1 is released. When the suction cups 10, 10 are elastically deformed,
is restored to its original state, the workpiece 1 is horizontally displaced from the mounting surface 6a of the inverted rotating jig 6 by a predetermined distance l, and as a result, the workpiece 1 is displaced from the mounting surface 6a of the inverted rotating jig 6 in the horizontal direction. There was a problem in that the workpiece 1 could not be accurately positioned and the workpiece could be assembled incorrectly to the main body, resulting in a corresponding decrease in work efficiency.

Means for Solving the Problems The present invention has been proposed in view of the above-mentioned problems. a suction pipe to which a suction cup is attached for suctioning a workpiece that has shifted its position; It is equipped with a magnet that selectively holds the workpiece by suction, and a guide member that is disposed on the side of the suction pipe and that corrects the positional deviation of the workpiece while it is being sucked by the suction cup. It is.

Function At a predetermined working position, when a horizontally misaligned work in a group of workpieces stacked in multiple tiers is picked up and held by the suction cup and magnet, the workpiece is lifted up by the guide rod during the lifting process. is pressed in the horizontal direction and the position is corrected to the appropriate position. That is, due to the pressing force applied to the workpiece, the workpiece moves horizontally while slidingly contacting the lower surface of the magnet while being attracted by the suction cup and the magnet, and this horizontal movement causes the suction cup to undergo elastic deformation. and bend.
When the workpiece is located at the rising end, suction of the workpiece by the suction cup is stopped, and the workpiece is suctioned and held only by the magnet. When the suction force is no longer applied to the suction cup, the elastically deformed suction cup returns to its original state, and the workpiece suction position by the suction cup shifts to a position close to the magnet. Thereafter, suction force is again applied to the suction cup, and the workpiece is suctioned and held by the suction cup and the magnet. Therefore, even if the restriction of the guide rod to the workpiece is released, the workpiece is positioned at an appropriate position corrected by the guide rod.

Embodiments Hereinafter, embodiments of the workpiece conveyance device 20 according to the present invention will be described with reference to FIGS. 1 to 5. In Figures 1 to 5, 21
is a mounting base installed horizontally and reciprocally between the transport conveyor 3 and the inverted rotating jig 6, and this mounting base 21 is held above the transport end 16 of the transport conveyor 3 at the movement start position a. and is held above the inverted rotating jig 6 at the movement end position b. Reference numerals 22 and 22 denote suction pipes connected to appropriate air suction means and installed through the mounting base 21 so as to be vertically movable. It has been placed.

Numerals 23 and 23 are elastically deformable inverted bowl-shaped suction cups, which are attached to the lower ends of the suction pipes 22, 22.

24, 24 are the suction pipes 2 attached to the mounting base 21.
2, 22, and the support rods 24, 24 are arranged adjacent to the suction pipes 22, 22 and in a substantially diagonal direction with respect to the workpiece 1. It has been done. 25,
A magnet 25 is an electromagnet attached to the lower end of the support rods 24, 24.
5 and 25 are arranged adjacent to the suction cups 23 and 23. 26a, 26a, 26b, 26
b is the adsorption cup 23, 23 and magnet 2
A plurality of guide rods are used to correct the position of the workpiece 1 attracted at steps 5 and 25 to an appropriate position corresponding to the workpiece placement surface 6a of the inverted rotating jig 6, and the guide rods 26a to 26b are Curved portions 27 are vertically disposed on the lower surface of the mounting base 21 and are arranged in a rectangular shape on both sides of the suction pipes 22, 22, and are formed at the tips.
a, 27a, 27b, and 27b are expanded outward.

Next, the procedure for transporting the workpiece will be explained as follows.

A group of works 14 in which works 1 are stacked in a plurality of stages is placed at a fixed pitch on the conveyor 3 and conveyed from an input end 15 toward an output end 16. At this time, since the bent portion 2 is formed on one side edge of the workpieces 1, the workpieces 1 on the upper stage side are stacked in a horizontally shifted position from the workpieces 1 on the lower stage side. Then, the suction pipe 2 where the first group of works 14 on the conveyor 3 is located at the movement start position a
2, 22, the suction pipe 22,
22 and support rods 24, 24 are lowered together, and as shown in FIG. Cup 23,
23 and magnets 25, 25.
When the workpiece 1 is suctioned and held by the suction cups 23, 23 and the magnets 25, 25, the suction pipes 22, 22 and the support rods 24, 24 rise together, and in the process of rising, the workpiece 1 is held by the guide rod 25.
a, 26a, and is gradually pressed in the horizontal direction by the guide rods 26a, 26a, and is corrected to an appropriate position. That is, due to the pressing force applied to the workpiece 1 due to the contact with the guide rods 26a, 26a, the workpiece 1 is attracted to the suction cups 23, 23 and the magnet 2.
5, 25, the magnet 25,
It moves in the horizontal direction while slidingly contacting the lower surfaces 25a, 25a of 25. This horizontal movement causes the suction cup 2 to
3 and 23 are elastically deformed and bent as shown in FIG. When the workpiece 1 is located at the rising end, suction of the workpiece 1 by the suction cups 23, 23 is stopped, and the workpiece 1 is suctioned and held by the magnets 25, 25 alone. When the suction by the suction cups 23, 23 stops, the elastically deformed suction cups 23, 23 return to their original state as shown in FIG. The position shifts to a position close to . In this state, the suction cups 23, 23 are
When a suction force is applied to the suction cups 23, 23 and the magnets 25, 25 to attract and hold the workpiece 1, the mounting base 21 is horizontally moved to the movement end position b. At this movement end position b, the suction pipes 22, 22 and the support rods 24, 24 are lowered together as shown in FIG.
3 and the workpiece 1 attracted by the magnets 25, 25 is placed on the workpiece placement surface 6a of the inverted rotating jig 6. At this time, the work 1 is moved to the suction cup 2 at the rising end of the movement starting end position a as described above.
3 and 23 and magnets 25 and 25, the suction positions of the suction cups 23 and 23 are changed to appropriate positions so as to correspond to the workpiece mounting surface 6a of the inverted rotating jig 6, so that the workpiece 1 is inverted. The work piece is accurately positioned and placed on the workpiece placement surface 6a of the rotating jig 6. When the workpiece 1 is thus placed on the workpiece placement surface 6a of the inverted rotating jig 6, suction of the workpiece 1 by the suction cups 23, 23 and magnets 25, 25 is stopped, and after that, the suction pipes 22, 22 The support rods 24, 24 rise together, and the suction cups 23, 23 and the magnets 25, 25 separate from the workpiece 1. after that,
The suction pipes 22, 22 and support rods 24, 2
4 returns to the original movement start position a, and repeats the same operation.

In the above-mentioned embodiment, the magnets 25, 25 are constantly exerted an attraction force, but the present invention is not limited to this. For example, at the rising end of the movement start position a, the attraction cups 23, magnet 25 only when changing the grip of workpiece 1,
25 may be used to adsorb the workpiece 1. Further, the work to be transferred is not limited to that of the above-described embodiment, and can be widely used when correcting the position of a work that is displaced in the horizontal direction and then transporting the work.

Effects of the Invention According to the present invention, a workpiece placed in a horizontally displaced state at a predetermined work position can be transported after being repositioned to an appropriate position on the transport path. When assembling parts to the main body of a car, if installed between the conveyor and the inverted rotating jig, workpieces that have shifted horizontally on the conveyor can be accurately positioned and placed on the inverted rotating jig. This allows the workpiece to be reliably assembled to the main body, and work efficiency can be greatly improved. Moreover, the structure is simple and the conveyor is cheap.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of an apparatus according to the present invention;
Figures 2 to 5 are explanatory diagrams showing the operation procedure. Figure 2 shows a state in which a horizontally misaligned workpiece is attracted, and Figure 3 shows a state in which the position of the workpiece has been corrected with a guide rod. 4 shows the state in which the suction position of the suction cup has been changed, and FIG. 5 shows the state immediately before placing the workpiece on the inverted rotating jig. 6th
The figure is a schematic perspective view showing the procedure for transporting parts in the process of assembling parts to the main body of an automobile.
The figure is a schematic perspective view of a conventional work transfer device, and FIGS. 8 to 10 are explanatory views showing the operation procedure. 22, 22... Suction pipe, 23, 23... Adsorption cup, 25, 25... Magnet, 26a,
26a, 26b, 26b... Guide members.

Claims (1)

[Claims] 1. A suction pipe that is installed to be movable vertically and horizontally, and has a suction cup attached to its lower end that sucks workpieces that have been stacked at a predetermined working position and are displaced in the horizontal direction, and a suction pipe that is installed at a position adjacent to the suction cup. , a magnet that is movably arranged in parallel with the suction cup and that selectively holds the workpiece by suction between the suction cup and the suction cup at least at the rising end; and a magnet that is disposed on the side of the suction pipe, and A workpiece conveyance device comprising a guide member for correcting positional deviation of the workpiece during the lifting process of the workpiece sucked by a suction cup.