JPS59142043A - Tool supporting table with magnetic base - Google Patents

Abstract

PURPOSE:To reduce height of ceiling walls effectively by forming the coil of a magnetic base foundation and a ring groove for accommodation of said coil in double construction concentrical with each other. CONSTITUTION:This is composed of an electromagnet foundation, which is formed by coil ring-grooves 8a, 8b as in a double construction concentrical with each other. Coils 9a, 9b fitted in these ring-grooves are supplied with current flowing opposite directions. Because formation of this double groove construction signifies dividing a single magnetic field into two, for inner and outer magnetic rings, the height of ceiling walls h2 can be reduced effectively. Practically, the area of one magnetic field is divided into M' and M'', and accordingly the flux at the inner magnetic ring can be arranged so that the wall area of ring-goove in the ring is equal to M' at the point A of the coil 8a and the area m'' to M'' at the point B of the coil 9b. Thus the height of ceiling walls can be raduced effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The magnetic base tool support is as shown in FIG. 1, in which Figure A is an overall front view and Figure B is a partially cutaway detailed view of the magnetic base. In this drawing, 1 is a magnetic base plate, 2
By rectifying the alternating current with a strainer box, the magnetic base platen 1 is electromagnetically attracted to the workpiece.

Reference numeral 3 denotes a slide column on the front side, which has a dovetail groove in the length direction, and a gear 5, which rotates when the handle 4 is operated, is pivotally supported on the upper side.

Reference numeral 6 denotes a slide rod that moves up and down the slide column 3, and a rack that meshes with the gear 5 is formed in its upper half, and an air drill is provided on the front side of the slide rod 6 in the illustrated example. 7 is vertically supported. In addition, in the drawing, 8 and 9 are the ring groove and coil in the magnetic base platen 1,
10 is a filler in one finger of epoxy zone, and 11 is an iron plate to be adsorbed.

By the way, the magnetic base tool support stand is desirable in order to improve the OT portability without reducing its magnetic absorption force and to improve the OT portability. Various studies have been made to reduce the weight of the coil 9, but the conventional countermeasures have been to use materials with high permeability or to change the amount of winding of the coil 9. The depth hl of the coil storage annular groove 8 can be made as shallow as possible without reducing the force.As for the ceiling wall thickness h2, it is necessary to absorb all the center magnetic pole magnetic flux. At point (A) where the magnetic flux density has reached the saturation magnetic flux density, specifically, the area of the ring ring wall surrounded by half a square r and the wall height h2 is m (Fig. 1B
Since it is required that the horizontal cross-sectional area M (the area of the double-dot chain line in Fig. 8) of the virtual cylinder with radius r at the center is equal to or greater than In fact, it is considered impossible to reduce the height h2, and therefore, the current situation is that conventional countermeasures do not significantly contribute to reducing the overall weight of the trap.

The present invention attempts to resolve the above-mentioned problems with vM,
- The coil of the air base plate 1 and the annular groove for storing the coil are formed into a concentric double structure. Hereinafter, the present invention will be explained based on the figures.

FIG. 2A is an overall front view, and FIG. 2B is a partially cutaway detailed view of the magnetic base plate, with the other parts being the same as the conventional structure shown in FIG. 1 except for the structure of the electromagnetic base plate.

In the present invention, as seen in this drawing, the coil ring grooves 8a and 8b are formed into a concentric double ring 4, and the coils 9a and 9b VC fitted in each ring groove conduct current in opposite directions. It's what you do. Note that the arrow indicates the direction of the lines of magnetic force.

Forming a double ring groove in the present invention means dividing one magnetic field t-2 in Fig. 1 into an inner magnetic ring and an outer magnetic ring, so the height of the ceiling wall h2 is It can be effectively reduced. Specifically, the area of M above is M
' and M'', the magnetic flux in the inner ring is equal to Ml at the point (A) of the coil 8a, and the magnetic flux in the outer ring is equal to Ml at the point (A) of the coil 8a. (b) At point 4, the height of the ring 4 walls m" should be equal to Ml, which means that the height h2 of the conventional ceiling wall can be reduced to approximately I
C# can be made smaller.

The present invention is constructed as described above, and reducing the ceiling wall height h2 to about i has a remarkable effect on reducing the overall weight. 11, which was not able to obtain sufficient adsorption force when the wall thickness was thin, is significantly improved, and by dividing the coil, heat dissipation from the coil part is improved, and the adsorption force does not decrease over a long period of time. It is.

Figures 3A and 3B show another example, in which the double ring structure of the electromagnetic base plate is connected next to each other, and in addition to reducing the overall load, it is extremely strong. This is extremely effective in obtaining magnetic absorption force.

[Brief explanation of the drawing]

Figure 1 shows the standard +f T, A is the front view, and Figure Bt
Figure 1 shows the device of the present invention, A is a front view, B is a detailed partially broken view of the electromagnet base, and Figure 3 shows another example. A is a front view, and the same day is a bottom view of the electromagnetic base. 1...Magnetic base plate 3...Slide support 6...Slide l'f7...Air drill 811. Ring groove 900. Coil 11... Adsorbed iron plate Patent applicant Sankyogumi Industries Co., Ltd. Patent attorney
Hiroshi Kuma-'1. Nejiji. 1- 1st A 2nd

Claims (1)

[Claims] (1) The coils of the magnetic base board and the ring grooves for storing them are formed into a concentric double structure, and current is passed through each coil in the opposite direction, so that the overall height of the ceiling wall is reduced. A magnetic base tool support stand characterized by: