JPS60172474A - Screw supply system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to a screw supply system, and particularly to a system suitable for supplying screws to a screw tightening device used in an industrial robot.

[Prior Art 1] Conventionally, there has been a screw feeding system of this type as shown in FIG. 1, for example.

FIG. 1 shows the screw feeding device 18 in use.

In the figure, a screw feeding device 18 is used to feed screws 14 to the screw tightening device 12.

The screw tightening device 12 is attached to a hand portion 10 of an industrial robot. This screw tightening device 12 is a suction pipe 1
It has 6. This suction pipe 16 suctions and holds the screw 14 by creating a negative pressure inside thereof. and,
This screw tightening device 12 is adapted to tighten screws on an object 20 to be screwed.

Next, the operation of the above device will be explained.

First, the screw tightening device 12 is moved to the screw supplying device 18 side, and the screw 14 is sucked and held by the u1 suction pipe 16. Next, the screw tightening device 12 is moved to the position of the object 20 to be screwed, and the suction pipe 16 is positioned. Thereafter, the screw tightening device 12 is driven to tighten the screw 14 to the object 20 to be screwed. This allows the screw tightening work to be performed.

By the way, as mentioned above, the conventional screw supply method has 1
When performing multiple screw tightening operations, the screw tightening device 12 had to be moved between the screw tightening object 20 and the screw tightening object 20 each time. For this reason, there was a drawback that the work efficiency of screw tightening was reduced.

Further, since the screw tightening device 12 moves while holding the screw 14 by the suction pipe 16, there is a fear that the screw 14 may fall during the movement.

[Summary of the invention] This invention was made to improve the drawbacks,
With a relatively simple configuration in which a screw holding part that moves forward and backward is installed in a screw feeding device, screws can be supplied to the screw tightening device without moving the screw tightening device,
This provides a screw supply method that can improve the efficiency of screw tightening work.

[Embodiment 1 of the Invention] Hereinafter, a preferred embodiment of the present invention will be described based on the drawings.

FIG. 2 shows the main parts of the screw feeding system according to the present invention.

Further, FIG. 3 does not show the main parts of the screw feeding system shown in FIG. 2 as well.

In the system shown in FIGS. 2 and 3, a screw feeding device 18 is first used, similar to that shown in FIG. This screw supply device 18 is used to supply screws 14 to the screw tightening device 12. The screw tightening device 12 is attached to a hand portion 10 of an industrial robot. This screw tightening device 12 has a suction pipe 16. By creating a negative pressure inside this suction pipe 161.11, the screw 14
Attracts and retains. The screw tightening device 12 then tightens the screws on the object 20 to be screwed.

3- Furthermore, in addition to the above-mentioned configuration, a screw feeding device 30 is provided. This screw feeding device 30 has a feeding pipe 26. A screw holding portion 22 is attached to the opening of the feed pipe 26.

The screw holding part 22 is moved forward and backward by the cylinder 24, and faces the open end 16a of the suction pipe 16 in the forward position. This screw holding part 2
2 is provided with a screw clearance in order to allow the screw 14 to be drawn up and held on the suction pipe 16 side. Further, the screw feeding device 30 is adapted to be moved up and down by the cylinder 28. As a result, screw 1
4 can be continuously supplied to the screw tightening device 12.

In addition to the above configuration, a hose 32, a screw pressure feeding device 34, a screw position detector 36. Screw support 38. A cylinder 40 and the like are provided. The hose 32 has one end connected to the feed via 2.
6, and the other end is connected to the lower end (discharge end) of the screw feeding device 34. The screw force feeding device 34 is a so-called end cutting device-4=, and pressure feeds the screw 17I using pressurized air or the like.

The screw position detector 36 detects the position of the screw 14 and is attached to the lower end 22a of the screw holding portion 22. The screw support 38 can be moved back and forth by a cylinder 40.

Now, in the screw feeding system configured as described above, the screw 14 falls into the hose 32 by retracting the screw support 38 by the cylinder 40. The screw that has fallen into the hose 32 is pumped by the screw pumping device 371 and sent to the screw holding part 22 via the feeding via 26, where it is attached to the holding part 22. The screw holding part 22 to which the screw 14 is attached is connected to the suction pipe 16 by the cylinder 24.
is moved to a position facing the open end 16a of. here,
When the inside of the suction pipe 16 is made to have a negative pressure by a vacuum pump or the like, the screw 14 is suctioned and held at the open end 16a of the suction pipe 16. Next, when the screw holding part 22 is moved back by the cylinder 24 and then the cylinder 28 is raised, the screw holding part 22 is separated from the open end 16a of the suction pipe 16. After this, the screw tightening device 12 is lowered and screw tightening work is performed.

A screw tightening device 12 has a pipe 16 that holds a screw for screw tightening work in a position above the pipe 16, and is moved forward and backward with respect to the pipe 16, and is opened in the pipe 16 in the forward position. a screw feeding device 30 having a screw holding portion 22 facing the end; and a screw feeding device 3 for force feeding the screw 14 from the screw feeding device 18 to the screw feeding device 30.
4 are provided. This allows the screw tightening operation to be performed while the screw tightening device 12 is fixed at a fixed position. Therefore, the screw tightening operation can be performed without the screw tightening device 12 moving between the screw supply device 18 and the object to be screwed 20, thereby greatly improving the efficiency of the screw tightening operation. can.

In the above embodiment, the screw feeding device 30 was attached to the screw tightening device @12, but this
Of course, it is also possible to obtain the same effect even when the screw is placed near the object 20 to be screwed.

[Effects of the Invention 1] As explained above, the present invention includes a screw feeding device having a screw holding portion whose upper end faces the pipe opening end of the screw tightening device, and a screw feeding device that pumps the screw with air or the like. Therefore, when performing screw tightening work, the screw tightening device can reliably supply and tighten screws without moving between the screw supply device and the object to be screwed. The effect is that work efficiency can be greatly improved.

[Brief explanation of the drawing]

Figure 1 is a diagram for explaining the conventional screw supply method, Figure 2
The figure is a diagram for explaining the screw supply method according to the present invention,
FIG. 3 is a diagram showing the main part of FIG. 2 in more detail. In the figure, 10 is a robot hand part, 12 is a screw tightening device, 14 is a screw, 16 is a suction pipe, 16a is an open end of the suction pipe, 18 is a screw supply device, 20 is an object to be screwed, and 22 is a screw holder. part, 2=7-2a is its lower end, 24 is the cylinder, 26 is the feeding pipe,
28 is a cylinder, 30 is a screw feeding device, 32 is a hose,
34 is a screw feeding device, 36 is a screw position detector, 38 is a screw support, and 40 is a cylinder. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent attorney Masuo Oiwa (2 others) -8 = Figure 2 Figure 3 / 10 / ---' f30 -1 1e,,, l 1 = 18. ? -4

Claims (3)

[Claims] (1) A screw tightening device having a pipe that holds a screw for screw tightening work, and a screw holding device that is moved forward and backward with respect to the pipe and faces the end of the width of the pipe in the forward position. and a screw feeding device that force-feeds the screws from the screw feeding device to the screw feeding device, and performs screw tightening work while fixing the screw tightening device in a fixed position. A screw feeding method characterized by: (2) The screw feeding system according to claim 1, wherein a detector for detecting the screw position is provided at the lower end of the screw holding portion. (3) The screw supply method according to claim 1 or 2, wherein a screw relief edge is cut in the screw holding portion.