JPS6265865A - Carrier having diagonal travel correcting function - 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 [Industrial Application Field] The present invention relates to a conveyance device that has a function of conveying a conveyed object such as a thin steel plate while accelerating and decelerating it, and also having a function of correcting the skew of the conveyed object.

[Conventional technology]

As methods for conveying materials such as thin steel plates, there are indirect conveyance methods such as roller conveyors and belt conveyors, and direct conveyance methods using linear motors.

As a direct conveyance method using a linear motor, for example, as seen in Japanese Patent Publication No. 59-20570, linear motors and conveyance air tables are arranged alternately along the conveyance line, and the linear motor is used to generate conveyance force. There is a system in which the conveyed object is given a conveying force by a beam near motor and floated on the air table, and the inertial sliding is sequentially repeated toward the next beam near motor to carry out the desired conveyance.

[Problem that the invention seeks to solve]

In this kind of conveyance, especially on a conveyance line where it is necessary to align and convey the conveyed materials using a piling device, etc.
A device is required to correct the skew of the conveyed material and position it at a predetermined position.

In addition, care must be taken to avoid damaging high-grade materials when correcting skew.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a conveying device that corrects skew without damaging a conveyed material during conveyance.

[Means for solving problems]

In order to achieve the object, the present invention provides an air table that uses a linear motor as a transport drive, in which the linear motors are arranged symmetrically with respect to the center line of the air table so that the components of the linear motors in the width direction of the transported material face each other. This is what I did.

Furthermore, as the linear motor that generates the force that pushes the transported material in the width direction, a dedicated linear motor disposed in the width direction of the transported material perpendicular to the transport direction may be used.

〔Example〕

The apparatus of the present invention is comprised of an air table 1 and linear motors 21+22, as shown in FIGS. 1 and 2, for example. A large number of air jet ports are provided on the top surface of the air table 1, and air, which is supplied from the duct 3, is jetted out. The material to be conveyed 4 floats due to this ejected air. The linear motors 2K and 22 are controlled to provide the necessary conveyance force for conveyance, taking into consideration the size, weight, speed, etc. of the conveyed material placed on the air table 1.

The linear motors 21 and 22 are arranged oppositely to the left and right with the center of the air table as a boundary, as shown in FIG.

The direction of the thrust of the linear motor is determined in the direction of vectors 9 and IO so that component forces are generated in the transport direction (vectors 5 and 6) and in the direction perpendicular to it (vectors 7 and 8), as shown in Figure 3. There is. Vectors 8 and 8 are component forces in a direction perpendicular to the conveyance direction, and their vector directions differ by 180° from each other. This vector acts as a diagonal correction component force.

When the conveyed material is on the air table, a component force in the conveying direction and a skew correction component force are generated on the conveyed material 4 as shown in FIG. When the projected area of the conveyed material 4 with respect to the linear motors 2L and 22 is equal (that is, it is not skewed), the skew correction component forces of the linear motors 21 and 22 cancel each other out, and only the component force in the conveying direction acts. become. The material to be conveyed 4 continues to advance in the conveyance direction.

On the other hand, when the conveyed material 4 is skewed, the projected areas of the conveyed material 4 with respect to the linear motors 21 and 22 are different, and therefore the skew correction components of the linear motors 21 and 2z cancel each other out. The conveyed material 4 is moved laterally.

The range in which the linear motors 2t and 22 generate thrust (width in the direction perpendicular to the Wi feed direction) is selected to be sufficiently larger than the width of the conveyed material 4.

In this way, in the conveying device according to the present invention, the skew correction and conveyance are performed on the air table 1 without the conveyed material 4 coming into contact with the table, so that the conveyed material 4 is not damaged. , since thrust is applied directly to the material to be transported 4, high-speed transport is possible.

Furthermore, as shown in FIG. 4, if the linear motor is divided into two types M11.12 for skew correction and conveyance, the acceleration/deceleration control and skew correction control of the conveyed material 4 can be performed more precisely.

〔Effect of the invention〕

Non-contact conveyance and non-contact skew correction are performed on the air table, so there is no damage to the conveyed material, and
With this skew correction function, the material to be transported can be transported while being located at the center of the air table.

Furthermore, the present invention employs a method of directly applying a thrust to the material to be conveyed, so high-speed conveyance and high acceleration speed are possible.

[Brief explanation of drawings]

FIG. 1 is a plan view of a conveying device according to the first invention of the present application, and FIG. 2 is an elevational view of the device viewed from the conveying direction. FIG. 3 is an explanatory diagram in which the thrust of the near motor shown in FIG. 1 is analyzed. FIG. 4 is a plan view of the conveying device according to the second invention of the present application. I: Air table 2s, 22: Linear motor 3: Air duct 4; Conveyed material Patent applicant Nippon Steel Corporation Stock tender (1 other person)

Claims (1)

[Claims] 1. In an air table that uses a linear motor as a transport drive, the linear motors are arranged symmetrically with respect to the center line of the air table so that the force components of the linear motors in the width direction of the transported material face each other. A conveying device with a characteristic skew correction function. 2. In an air table that uses a linear motor as a transport drive, a skew correction characterized in that the linear motor that generates a force that pushes the material to be transported in the width direction of the linear motor is arranged symmetrically with respect to the center line of the air table. Conveyance device with functions.