JPH07171784A - Chuck device - Google Patents

Abstract

PURPOSE:To provide a chuck device used for a plate picking unloader or the like, obtaining attracting force without unevenness in the whole attracting face area and able to attract small pieces. CONSTITUTION:An approximately circular electromagnet 28 with magnetic poles at the center part 31a and the outer peripheral part 31b is provided, and the attracting face side of this electromagnet 28 is provided with a laminated body 30 with magnetic substance layers 29a and non-magnetic substance layers 29b laminated alternately so that the respective layers 29a, 29b are arranged onto the outer peripheral side form the center side of the electromagnet 28, thus forming a chuck device A. The laminated body 30 is formed by combining four split laminated bodies 29 with the respective layers 29a, 29b laminated in plate shape. The laminated body 30 can be also formed by concentrically laminating magnetic substance layers and non-magnetic substance layers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck device which is used in a plate material conveying device and various other devices to magnetically adsorb a plate piece or the like.

[0002]

2. Description of the Related Art Conventionally, as a chuck device used in a plate material conveying device or the like, there is one that uses an electromagnet. Figure 5
It is a longitudinal cross-sectional view showing an example thereof. This chuck device 40
Is an electromagnet formed by winding a coil 42 around the center 41a of a coaxial core 41 having both magnetic poles at the center 41a and the outer periphery 41b. FIG. 6A is a vertical sectional view of another example, and FIG. 6B is a bottom view thereof. This chuck device 43 is one in which a laminated body 44 in which magnetic layers 44a and non-magnetic layers 44b are alternately laminated is provided on the lower surface of the core 41 so that the end surfaces of the layers 44a and 44b are exposed on the lower surface. Is.

[0003]

In the case of the chuck device 40 shown in FIG. 5, the central portion 41a of the core 41 and the outer peripheral portion 41b.
Since the magnetic lines of force are generated only between and, its central portion 41a
Small metal plate material W that does not extend from the outer peripheral portion 41b to the outer peripheral portion 41b
There is a problem that the adsorption effect is extremely small for No. 1. In the case of the chuck device 43 shown in FIG. 6, the magnetic layers 44a of the laminated body 44 are magnetized to form small magnetic poles, and magnetic force lines are generated between the small magnetic poles. Therefore, the distribution of magnetic force lines becomes fine, and even a small plate piece can be adsorbed. However, although sufficient magnetic force can be obtained in the region R1 where the laminated surface of the laminated body 44 and the magnetic force lines of the core 41 are orthogonal to each other, the laminated body 4
Region R2 in which the laminated surface of No. 4 and the magnetic lines of force of the core 41 are parallel to each other
In this case, the magnetic force becomes small, and the small plate pieces located in this region R2 cannot adsorb. Therefore, the effect for adsorbing small pieces is small.

An object of the present invention is to provide a chucking device having a simple structure capable of obtaining a uniform suction force over the entire suction surface and capable of sucking small pieces.

[0005]

A chuck device according to the present invention is provided with an electromagnet having magnetic poles at a central portion and an outer peripheral portion, and magnetic layers and non-magnetic layers are alternately laminated on the attracting surface side of the electromagnet. The laminated body is provided so that each layer is arranged from the center side of the electromagnet to the outer peripheral side.

[0006]

According to this chuck device, each magnetic layer of the laminated body is magnetized by the electromagnet to generate lines of magnetic force between the magnetic layers, and the distribution of lines of magnetic force becomes fine. In this case, since the magnetic material layers are arranged from the center side to the outer peripheral side, all the magnetic material layers are substantially orthogonal to the magnetic lines of force generated between the magnetic poles of the central portion and the outer peripheral portion of the electromagnet, which is sufficient. Is magnetized. Therefore, uniform magnetic force is obtained over the entire adsorption surface formed of the surface of the laminated body, and even small pieces can be adsorbed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIG. This chuck device A is provided with a block-shaped laminated body 30 in which a magnetic material layer 29a and a non-magnetic material layer 29b are laminated as will be described later on the lower surface serving as the attraction surface of the electromagnet 28. The electromagnet 28 includes an integral core 31 having a circular shaft-shaped central portion 31a and a cylindrical outer peripheral portion 31b as both magnetic poles, and a coil 3 housed in a space between the central portion 31a and the outer peripheral portion 31b.
It is composed of 2 etc.

As shown in FIG. 1B, the laminated body 30 has
It has a rectangular plate shape whose side length is substantially equal to the outer diameter of the core 31, and is equally divided into four small rectangular divided laminated bodies 29. As shown in FIG. 1C, each divided laminated body 29 is formed by laminating a magnetic material layer 29a and a non-magnetic material layer 29b such that the laminated surface is parallel to the diagonal line of the rectangle. By combining the divided laminated body 29 so that the layers 29a and 29b continue in a rectangular frame shape, the magnetic layer 2
9a and the nonmagnetic layer 29b are arranged in a single laminated body 30 arranged from the center side of the electromagnet 28 to the outer peripheral side. Magnetic layer 29
A soft iron plate or the like is used for a, and brass or a synthetic resin plate or the like is used for the nonmagnetic layer 29b.

A laminated body in which magnetic layers and non-magnetic layers are alternately laminated is commercially available as a rectangular plate-shaped block like the laminated body 44 in FIG. This commercially available laminate is
It was developed as a peripheral device for grinding, etc., for assisting the attraction of a magnet chuck for fixing a work, etc., but the rectangular plate-shaped block as described above is diagonally cut and processed to divide it as shown in FIG. 1 (C). It can be a laminate 29.

According to the chuck device A having this structure, the magnetic layers 29a of the laminate 30 are magnetized by the electromagnet 28 to generate magnetic lines of force between the magnetic layers 29a, and the distribution of the magnetic lines becomes narrow. In this case, since the magnetic layers 29a are arranged from the center side to the outer peripheral side, whichever magnetic layer 29a
Also, the core central portion 31a and the core outer peripheral portion 31b of the electromagnet 28
The magnetic lines of force generated between the magnetic poles are substantially perpendicular to each other and are sufficiently magnetized. Therefore, even magnetic force can be obtained over the entire adsorption surface, which is the lower surface of the laminated body 29a, and even small pieces can be adsorbed. Further, the laminated body 30 is a combination of four divided laminated bodies 29, and each divided laminated body 29 has a shape in which flat layers 29a and 29b are simply laminated. Therefore, the laminated body 30 can be easily manufactured.

In the above embodiment, the laminated body 30 of the chuck device A is composed of a combination of four divided laminated bodies 29. However, like the chuck device B of FIG.
You may use the laminated body 34 which laminated | stacked a and the nonmagnetic material layer 34b by the concentric pattern alternately. In this case, since the intersecting directions of the lines of magnetic force generated between the central portion 31a and the outer peripheral portion 31b of the electromagnet 28 with respect to the magnetic layer 34a are all orthogonal, the magnetic force is uniform over the entire adsorption surface, and the magnetic force is further improved. It is strengthened and the adsorption effect is improved.

FIGS. 2 and 3 show a plate material processing line and its unloader, respectively, in which the chuck devices A and B having the configuration of FIG. 1 or 4 are used as a picking unloader. In this processing line, a plate material processing machine 1 including a turret punch press, an auxiliary table 5, a stock conveyor 8, and a waste material discharge station 10 are sequentially arranged, and a picking unloader 14 is installed on a rail 13 installed above them. It is installed so that it can run freely. The stock conveyor 8 is for loading the product plate material received on the conveyor surface on the product cart 6 below.

The plate material processing machine 1 punches a material plate material W (FIG. 3) placed on the work table 2 with a punch head (not shown) installed on the upper frame 33. It has a work holder 3 for gripping W and feeding it to the punch position. The work holder 3 is
The carriage 4 is installed so as to be movable left and right. Further, in addition to the punch head, the plate material processing machine 1 is provided with a sub head 9 which is a punch head dedicated to cutting a micro joint in the upper frame 33. That is, when a large number of small products are cut from the material plate W by punching such as nibbling, the cross section called the micro joint is left and the product plate and the surrounding slag part are cut off. Cut the joint. The sub head 9 is used for cutting the cross section.

The picking unloader 14 is constructed as follows so that such a small product plate material can be carried out. That is, the gripper 19 is provided at the front end of the unloader main body 15 traveling along the erection rail 13 in the traveling direction (X direction) via the hanging frame 18, and
An elevating frame 17 is provided behind the pantograph type elevating device 16, and an elevating device 25 is further provided on the elevating frame 17.
A plurality of chucks 23 for sucking the product plate material are provided side by side in the front-rear direction and the left-right direction.

A sub-support frame 27 is provided on one edge of the elevating frame 17 via a hanging member 26, and a plurality of small piece chucks 24 are arranged in two rows in the Y direction on the sub support frame 27. Many are installed side by side. These small piece chucks 24 are arranged such that a part thereof can enter the lower portion 33a of the upper frame 33 and are denser than the arrangement intervals of the chucks 23. Also, the small piece chuck 24
Are arranged below the rising standby position of the chuck 23.

As the chuck 24 for small pieces, the chuck device A of FIG. 1 or the chuck device B of FIG. 4 is used, and each chuck device 24 can be individually electromagnetically driven. A normal electromagnetic chuck having no laminated body is used for each of the other chucks 23, but the chucks A and B shown in FIG. 1 or 4 may be used for the chuck 23. By using the chucks A and B of the above-described embodiment as the chucks 24 of the picking unloader 14 as described above, the plate pieces, which are products or slags separated from the material plate material W on the plate material processing machine 1, are attached to the suction surface of the chuck 24. Even smaller pieces can be adsorbed by these chucks 24 and reliably carried out.

[0017]

The chuck device according to the present invention is provided with an electromagnet having magnetic poles at the central portion and the outer peripheral portion, and a laminated body in which magnetic layers and nonmagnetic layers are alternately laminated on the attracting surface side of the electromagnet. Since the layers are provided so as to be arranged from the center side to the outer peripheral side of the electromagnet, it is possible to obtain a uniform attracting force over the entire attracting surface, and it is possible to chuck even a small piece smaller than the attracting surface.

[Brief description of drawings]

FIG. 1A is a vertical cross-sectional view of a chuck device according to an embodiment of the present invention, FIG. 1B is a bottom view thereof, and FIG. 1C is an exploded view of a laminated body in the chuck device.

FIG. 2 is a schematic front view of a plate material processing line in which the chuck device is used.

FIG. 3 is a side view showing a main part of an unloader in the plate material processing line.

FIG. 4 is a bottom view showing a chuck device according to another embodiment.

FIG. 5 is a vertical sectional view showing a conventional example.

FIG. 6A is a vertical sectional view of another conventional example, and FIG. 6B is a bottom view thereof.

[Explanation of symbols]

A, B, 23, 24 ... Chuck device, 28 ... Electromagnet, 2
9 ... Divided laminate, 29a, 34a ... Magnetic layer, 29b,
34b ... Nonmagnetic material layer, 30, 34 ... Laminated body, 31 ... Core, 31a ... Center part, 31b ... Outer peripheral part

Claims (1)

[Claims] 1. An electromagnet having magnetic poles in a central portion and an outer peripheral portion is provided, and a laminated body in which magnetic layers and non-magnetic layers are alternately laminated on the attracting surface side of the electromagnet, each layer being the central side of the electromagnet. The chuck device is provided so as to line up from the outer circumference side.