JPH02239042A - electromagnetic floater - Google Patents

Abstract

PURPOSE:To separate sheet materials from each other securely by providing electromagnets in a plurality of stages, floating the sheet materials successively thereby to separate each of them from laminated sheet materials. CONSTITUTION:A magnet floater for separating laminated sheet materials 2 one by one is provided with a plurality of electromagnets 1a, 1b in a plurality of stages and the sheet materials 2 are separated from each other by switching the electromagnets 1a, 1b to float the sheet materials 2 successively. Consequently, even if the thickness of the sheet material 2 is thick and the sheet materials are stuck to each other due to oil attached on the surface thereof, the sheet materials 2 are separated from each other while the sheet materials are floated successively so that the sheet materials 2 can be separated from each other securely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic floater that separates sheet materials using electromagnetic magnets provided in multiple stages.

[Conventional technology]

Conventionally, a day stack device that separates stacked sheet materials one by one from above and supplies them to a press is provided with a magnetic floater that separates the sheet materials.

The above-mentioned conventional magnetic floater brings a magnet made of an electromagnet or a permanent magnet into contact with the sheet material to be separated.
The sheet material is separated using the repulsion effect of a magnet, and the separated sheet material is attracted to conveying means such as a vacuum cup and a magnetic conveyor and transported to a press.

[Problem to be solved by the invention]

The conventional magnetic floater mentioned above has a separating effect on thin sheets, but it does not work even when the sheet material is thick or thin.
If there is oil on the surface and the sheets are stuck together due to this oil, they may not be able to be separated, which may result in double feeding, where two or more sheets are conveyed overlapping each other. There was a problem.

The present invention has been made in order to improve the above-mentioned problems, and it is an object of the present invention to provide an electromagnetic floater in which sheet materials can be reliably separated by electromagnetic magnets provided in multiple stages.

[Means and effects for solving the problems] In order to achieve the above objects, the present invention has the following features: In a magnetic floater that separates laminated sheet materials one by one, a plurality of electromagnetic magnets are provided in multiple stages, and these electromagnetic magnets are switched to levitate the sheet materials one by one, thereby separating the laminated sheet materials one by one from the top. The present invention provides an electromagnetic floater that is separated into parts.

〔Example〕

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

In the figure, 1 is a floater body provided above the stacked sheet materials 2, which is installed on both sides of the sheet material 2 and lifts the sheet material 2 from above by a lifter (not shown).
It is designed to be separated one by one.

The magnet main body 1 has a structure in which electromagnetic magnets 1a1b are stacked in two stages, and when the sheet material 2 is carried in, it is retracted by a driving means such as a cylinder (not shown), and the sheet material 2 is
When the sheet material 2 is carried in and raised to a predetermined height, it is advanced so that it comes into contact with the side surfaces of the sheet material 2 from both sides.

Each electromagnetic magnet 1a, lb is connected to a power source via a switch circuit (not shown), and above the floater main body 1 is a conveying device such as a magnetic conveyor that attracts the separated sheet material 2 and conveys it to a press. 3 is provided.

Next, to explain the operation, the sheet material 2 to be conveyed to the press
After carrying the stacked layers under the floater main body 1,
The upper surface is raised to a predetermined height by the lifter, and then the left and right floater bodies 1 are advanced by the drive means so as to come into contact with both sides of the sheet material 2.

In this state, when the lower electromagnetic magnet 1a is first energized by a switch circuit (not shown), one of the uppermost sheet materials 2 floats up as shown in FIG. 1 due to the repulsion of the magnetic force, and the stacked sheet materials 2 more separated.

After that, the floating sheet material 2 becomes the upper electromagnetic magnet 1b.
When the height is reached, the switch circuit turns on the upper electromagnetic magnet 1b, and then turns on the lower electromagnetic magnet 1a.
Turn off.

As a result, the sheet material 1 further floats as shown in FIG. 3, and is attracted to the F side of the conveying device 3 as shown in FIG. 4. In this state, the lower electromagnetic magnet 1a is turned on again, The electromagnet 1b is turned off to levitate the next sheet material 2, and the sheet material 2 attracted to the conveyance device 3 is conveyed in the direction of the arrow and carried into a press (not shown).

By repeating the above operations, the laminated sheet materials 2 are separated one by one and transported into the press.

In the above embodiment, the electromagnetic magnets 1a and lb are provided in two stages, but if the height of the conveying device 3 is high, three or more stages may be provided.

Further, although the sheet material 2 is successively levitated by switching the electromagnetic magnets 1a and lb provided in multiple stages, the sheet material 2 may be levitated by changing the strength of the magnetic field or changing the polarity. Alternatively, the sheet material 2 may be levitated by combining an electromagnetic magnet with a permanent magnet.

〔Effect of the invention〕

As described in detail above, this device is equipped with multiple stages of electromagnetic magnets, and these electromagnetic magnets sequentially levitate the sheet material to separate it from the stacked sheet materials. is thick or
Even if the sheet materials are in close contact with each other due to oil adhering to their surfaces, they are separated while being floated one after another, so that the sheet materials can be reliably separated.

This prevents double feeding of sheet materials, where multiple sheets of material are simultaneously carried into the press, eliminating the need for a detector to detect double feeding of sheet materials, and also preventing multiple sheet materials from being pressed into the press due to a detection error. This will also eliminate problems such as damage to molds and the like when they are transported inside.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a side view, FIG. 2 being a plan view, and FIGS. 3 and 4 being action explanatory views. 1a and lb are electromagnetic magnets, and 2 is a sheet material.

Claims (2)

[Claims] (1) In a magnetic floater that separates stacked sheet materials 2 one by one, a plurality of electromagnetic magnets 1a, 1
b are provided in multiple stages, and these electromagnetic magnets 1a,
An electromagnetic floater characterized in that the sheet material 2 is separated by sequentially floating the sheet material 2 by switching 1b. (2) An electromagnetic floater in which the sheet material 2 is levitated by switching the magnetic field strength of electromagnetic magnets 1a and 1b provided in multiple stages.