JPS58205626A - Plate positioning device - Google Patents

Abstract

PURPOSE:To simplify mechanism and facilitate control, by connecting a movable link to respective free end of a driving link and an auxiliary link ends of which are supported rotatably at specified position to form a four nodal link, and providing a plate holding device at the free end of the movable link. CONSTITUTION:A rotary actuator 17 is supported by a bracket 16 fixed to the lower face of a mounting stand 8. A gear 18 is fixed to the rotation shaft. A gear 20 that engages with the gear 18 is fixed to an end of a shaft 19 supported rotatably to the mounting stand 8, and a link 21 is fixed to another end. A link 23 is supported rotatably to a shaft 22 erected at specified position of the stand 8. Pins 24, 25 are erected at free ends of links 21, 23. A link 26 is connected rotatably to pins 24, 25 and a four nodal link mechanism is formed by the stand 8, links 21, 23 and a link 26. A chuck 5 is attached to the free end of the link 26.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides for a plate material existing near a predetermined positioning location to be
The present invention relates to a device for positioning at a predetermined position with high precision.

For example, when processing a steel plate using an NC press or the like, in order to drill holes at an accurate position, the iron plate must be positioned at an accurate position and then chucked. The iron plates are sent from a conveyor connected to the NC press or placed by humans. In order to accurately position the iron plate that has been brought to a predetermined position in this manner, a device gadth as shown in FIGS. 1 and 2 is used. That is, the iron plate 1 is placed on the table top surface 11 near a predetermined position. A pair of stoppers 9 and 10 are provided on the table 11 in a protruding manner. Also, table 11
An L-shaped '#I414 is formed in the. The magnet 2 that slidably passes through this groove 4 is a moving block 5.
is fixed. Further, a cam follower 3 is attached to the movable block 5, and this cam follower 3 moves along a groove 4 cut in the mounting base 8. That is, the magnet 2 moves along the groove 14. The cylinder 6.7 provides driving force to the movable block 5. Also 11
．． 12 is a 3-position solenoid valve.

In the above configuration, first, the magnet 2 is energized to attract the iron plate 1. Next, when the solenoid valve 12 is moved in the direction of pulling the rod of the cylinder 7, the magnet 2 moves along the groove 14, and the iron plate 1 is moved in the direction of the stopper 10 accordingly. At this time, the rod of cylinder 6 must move freely, so solenoid valve 11
is at the center position.

When the iron plate 1 hits the stopper 10, a slip occurs between the magnet 2 and the iron plate 1, and the iron plate 1 is pressed against the stopper 10.

When the rod of the cylinder 7 is completely retracted, the solenoid valve 12 is switched to the center position and the solenoid valve 11 is switched in the direction in which the rod of the cylinder 6 comes out. In this way, the magnet 2 moves in the direction of the stopper 9, and therefore the iron plate 1 also moves in the direction of the stopper 9. When the iron plate 1 hits the stopper 9, a slip occurs between it and the magnet 2,
It is pressed against the stopper 9.

By the above method, the sides of the iron plate 1 are pressed against the stoppers 9 and 10 to complete positioning, and the magnet 2 is de-energized.

However, in the above device, the actuator uses two cylinders and a 3-position solenoid valve must be used, which not only complicates control but also makes the device expensive. .

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a plate positioning device that has a simple mechanism and is easy to control. A movable link is rotatably coupled to each free end of a drive link and an auxiliary link which are rotatably supported at a position to form a four-bar link, and a plate holding means is arranged at the free end of the movable link. It is characterized by

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

3 and 4 show an embodiment of the present invention,
In this figure, the same parts as in FIGS. 1 and 2 are designated by the same reference numerals. A rotary actuator 17 is supported by a bracket 16 fixed to the lower surface of the mounting base 8. A gear 18 is fixed to the rotary actuator 170 rotation shaft. A gear 20 that meshes with the gear 18 is fixed to one end of a shaft 19 rotatably supported by the mounting base 8, and a link 21 is fixed to the other end. A link 25 is rotatably supported on a shaft 22 erected at a predetermined position of the mounting base 8 . At each free end of each link 21.23 there is a respective pin 24.
25 are erected.

A link 26 is rotatably coupled to each of said pins 24.25 and is connected to the mount 8. Links 21, 25 and 26 form a four-bar linkage.

A chuck 5 is attached to the free end of the link 26.

In the above configuration, when the iron plate 1 is supplied onto the table 11 and the chuck 5 sucks and holds the iron plate 1, the rotary actuator 17 is activated to rotate the gear 1B. Then, the link 21 rotates via the gear 20, and the link 2
Move 6. At this time, the movement of the link 26 is regulated by the link 23, so the chuck 5 moves along the groove 14. That is, after the link 26 starts moving,
In the first half, the chuck 5 moves toward the stopper 10, and in the second half, the chuck 5 moves toward the stopper 9.

When the iron plate 1 held by the chuck 5 hits the stopper 10 and the stopper 9, the chuck 5 slides relative to the iron plate 1. Therefore, the iron plate 1 is connected to the stopper 9.
It is positioned in a state where it is in contact with 10. Then, the holding of the iron plate 1 by the chuck 5 is released.

Furthermore, when the rotary actuator 17 is reversed, the chuck 5 returns to its original position along the groove 14.0 As described above, in the present invention, since the chuck that moves the iron plate etc. is given motion by the four-bar link, As the movement becomes smoother, the iron plate moves smoothly, allowing for better positioning. Furthermore, since the mechanism is simple, the device can be manufactured at low cost. In addition, since there is only one actuator compared to conventional models, control is extremely simple, and since only a single rotational movement is the driving source, positioning operation is faster than with conventional B & barrels. This has the effect of increasing speed.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the conventional mechanism, Figure 2 is its cross section, and Figure 6 is an explanatory diagram of the conventional mechanism.
The figure is an explanatory diagram of one embodiment of the present invention, and Fig. 4 is its 1111
It is a front view. 1... Steel plate 2... Chuck 8... Mounting base 9.10... Stopper 17, rotary actuator 21, 25.26... Link sister 1 Figure

Claims (1)

[Claims] In a positioning device that positions an end surface of a plate by abutting it against a stopper placed at a predetermined position, there is a drive link whose one end is rotatably supported, and a drive link whose one end is rotatably supported at a predetermined distance from the drive link. an auxiliary link; a movable link having one end rotatably coupled to the free end of the drive link and a center portion rotatably coupled to the free end of the auxiliary link; and a movable link supported by the free end of the movable link. What is claimed is: 1. A positioning device for a plate material, comprising: means for holding the plate material; and a drive source for rotating the drive link in forward and reverse directions.