JPS60167811A - Drive device of high-speed shuttle conveyor - Google Patents

Abstract

PURPOSE:To allow exact positioning by driving a shuttle conveyor via buffer units and also directly positioning it with a stop positioning unit. CONSTITUTION:Shuttle conveyor 3 is driven via buffer units 15, 16, and the stop position of the shuttle conveyor 3 is directly positioned by a stop positioning unit 23 without using the buffer units 15, 16. Accordingly, when the main body 3 is moved at a high speed and stopped at a loading point, work point, etc. by a drive unit 10, its stop position precision is normally low, but if the positioning stop unit 23 is operated, the main body 3 can be exactly positioned and stopped with the buffer unit springs 15, 16 extended or shrunk, and a conveyed object can be exactly transferred between a support metal 5 at the loading point or work point of the conveyed object and a lift unit or a lifter 4.

Description

[Detailed description of the invention] The present invention relates to a drive device for a high speed shuttle conveyor.

Conventionally, in order to improve the accuracy of the stop position of a shuttle conveyor, a hydraulic drive device was generally used, and the stop position was achieved by making contact with an end stopper.

However, the hydraulic drive system is expensive, requires troublesome maintenance, and has the disadvantage that it is not sufficiently decelerated just before stopping, resulting in a large impact with the stopper. For this reason, there are motor drive devices that employ sophisticated control systems, but because they do not use end stops, the accuracy of the stopping position is extremely lower than with stopper systems. In addition, especially when operating a shuttle conveyor at high speeds, rapid acceleration and deceleration are required to shorten the conveyance time, but conventional drive devices have the disadvantage of causing large shocks to the conveyed objects because they do not have a cushioning material. Ta.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-speed shuttle conveyor drive device that eliminates the above-mentioned drawbacks of the conventional technology. It is characterized by direct positioning without using a shock absorber.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Illustrated embodiments of the invention will be described below.

The shuttle conveyor 1 is loaded with a car body M that has been transported to a loading point A by a dolly and lifted up by a lifting device 2 (Fig. 1a). Sequentially feed the body M to D, each point B,
In C and D, while the main body 3 of the shuttle conveyor I is stopped, the ζ lifter 4 lifts the body M and the robot machining is performed on the 4th day M with the shuttle conveyor main body 3 free to move back and forth. .

On the shuttle conveyor main body 3, a support part 7, which is formed by fixing four supporting metal fittings 5 on the front, rear, right and left sides, which hold the transferred material M through a horizontal member 6, is located at the loading point A, work points B, C, and D. Correspondingly, a plurality of sets are arranged with a constant bisochi L. Support metal fittings 5
A jig 8 for regulating the support position of the transferred object M is fixed to the upper end of the holder.

When the transferred object M is lifted up by the lifting device 2, when the main body 3 retreats and the rearmost support part 7a stops at the fixed position below the transferred object M, the transferred object M is lowered and moved up to the support part 7a. (Fig. 1a). Then, when the main body 3 moves forward by a distance L (FIG. 1b), the lifter 4 rises to support the transferred object M, and during this time, the transferred object M is subjected to robot processing. During the processing, the main body 3 further moves forward by a certain distance (g), transfers the object M on the support section 7 at the forefront to the unloading point F (Fig. 1c), and unloads the object M by the lifting device 9. do. Next, the main body 3 is moved back to a position where the front and rear ends do not interfere with the transferred object M on the lifting device 2.9 (Fig. 1 d), and after a short waiting time, it is moved back again and stopped at point A, where it moves to the next moving object. Loading of M is performed.

The driving device and positioning stop device for the above-mentioned back and forth movement and positioning stop of the main body 3 will be explained with reference to FIGS. 2 and 3. A floating carrier 13 with a rack 12 carved on the lower side as a driven member is guided and supported by rollers 14 so as to be movable back and forth on a pair of channel-shaped rails 11 fixed to the same.
5 and 16 are brought into contact. A rotating shaft 18 of a binion 17 that meshes with the rack 12 is supported on a conveyor frame 19, and the rotating shaft 18 is rotationally driven by a variable speed motor 22 via a reduction gear 1820 and a brake 21.

The positioning and stopping device 23 has a rail 25 fixed to the center of a transverse member 24 fixed to the conveyor frame 19, and a tongue carrier 28 that is moved back and forth on the rail by rollers 26 and an air cylinder 27. As shown in detail in FIGS. 4 to 6, the tong carrier 28 has a horizontal cam surface 29 on the upper half thereof, and an L-shaped front dog 31 is attached to a bracket 30 fixed to the rail 25 and is rotated by a pin 32. Support freely. When the carrier 28 is retreating, the front end of the tongue 31 is lowered due to its own weight (tilt position (Fig. 5)).
However, when the carrier 28 moves forward, it is rotated by the cam surface 29 to the upright position (FIG. 4) and opened. The supporting plate 33 fixed to the upper rear half of the carrier 28 is attached to the rear dog 3.
The dog 34 is placed in the groove 35 of the dog 34 and supported freely to rotate by a pin 36, and slide plates 37 are provided protruding from both sides of the dog 34, and when the carrier 28 moves forward, the slide plate 37 connects to the guide plate 38 fixed to the upper part of the rail 25. When the dog 34 comes into contact with the dog 34, it stands up (Fig. 4), and as the carrier 28 moves further forward, the dog 31
and 34 pinch the button P protruding from the lower part of the main body 3 to position and stop the main body 3. Butsusha P is loading point A
and the work point (FIG. 1 pi, P2).

When the main body 3 is moved at high speed to a loading point, a work point, etc. by the drive device 10 and stopped, the accuracy of the stop position is generally low, but if the positioning stop device 23 is activated, the springs 15, 16
The main body 3 can be accurately positioned and stopped while expanding and contracting, and the object to be transferred can be loaded and transferred between the support fitting 5 and the lifting device 2 or the lifter 4 at the work point. In addition, since the springs 15 and 16 reduce the shock when the main body 3 suddenly starts or stops, even if the shuttle conveyor is driven at high speed, it is possible to reduce the impact on the conveyed objects of the shuttle conveyor when starting and stopping. This makes it possible to improve the processing capacity of transferred objects.

The present invention has the above configuration and has the effect of increasing the speed of the shuttle conveyor and making it possible to accurately position and stop the shuttle conveyor.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the overall operation of an embodiment of the present invention, Figure 2 is an elevational view of the main parts, Figure 3 is a side view, and Figures 4 and 5 are when the positioning and stopping device is activated. and inoperative elevation;
FIG. 6 is a sectional view taken along the line X--X in FIG. 4. 3...Shuttle conveyor main body 7...Transfer object support part 12.13...Transferred member 15.16...Buffer member ■7-22...Fixed drive device 23...Positioning stop device Agent: Patent attorney Yuyozai - 1 other person

Claims (1)

[Claims] A shuttle conveyor body is provided with a shuttle conveyor body that is guided in the longitudinal direction and has a large number of transferred object support parts disposed in the direction, and is stopped at a fixed position by a positioning and stopping device. A drive device for a high-speed shuttle conveyor, characterized in that a driven member is attached via a member, and the power for guiding and moving the shuttle conveyor body is transmitted to the driven member by a fixed drive device.