JPH0254036B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a rotating body equipped with a DC electromagnet, which is used as a holding device of a shearing machine, etc., which cuts thin plates or long objects made of magnetic materials such as iron plates. Regarding an adsorption device.

[Conventional technology]

Previously, this type of adsorption device had patent No. 982205 (Japanese Patent Publication No. 14786/1986) and utility model registration No.
There are Utility Model Registration No. 1241884 (Utility Model Publication No. 1292709 (Utility Model Publication No. 1987-46624), etc.).

[Problem to be solved by the invention]

In all conventional suction devices, a large number of roller bodies each having two rollers coaxially arranged at a certain distance and freely rotatable are arranged side by side on a rail core magnetized by an excitation coil, and one of the rollers is placed at the north pole and the other roller is placed at the north pole. Since the structure is configured to magnetize the S-pole, there is no problem in linear suction and transfer of the iron plate, etc. to be processed along the direction of rotation of the roller, but displacement to the left, right, diagonal, etc. This is extremely difficult due to the relationship with adsorption power. Therefore, in order to achieve precision in cutting dimensions, etc., it is necessary to adjust the applied voltage to make the suction force weaker within the range that allows for hanging, and carefully insert the board along the side gauge, making improvements for actual use. There was room for.

This invention was made with the aim of solving such problems, and in particular, by replacing the conventional roller with a steel ball or other rotating body, it can be easily and reliably adsorbed when feeding an iron plate, etc. to be processed. By making it possible to move and move in any direction such as front and back, left and right, diagonally, etc., we aim to improve the accuracy of cutting dimensions, etc. and improve workability, and also to improve the accuracy of cutting dimensions, etc. An object of the present invention is to provide a suction device with a rotating body using a DC electromagnet, which ensures reliability of suction and holding by automatically adjusting the suction force, and also improves safety.

[Means to solve the problem]

In order to achieve the above object, the adsorption device of the present invention is provided with a long case A having a cross section formed by a top iron plate 1 and side yokes 2 and 2', and an electromagnet M is wound around an electromagnetic coil 6. A hemispherical holding case 8 has a hemispherical holding case 8 in which a rotary body B ₁ made of a steel ball or other magnetic material is freely rotatably held at its lower end via a bearing 9, and the magnetic material is always biased downward by a spring 10. A coil core 4 to which a supporting case 11 is fixed, and a holding case 8 having a rotary body _B2 rotatably held at its lower end via a bearing 9 are attached to a spring 10.
The support case 11 is always biased downward by
1 consisting of a magnetic material that is magnetized to different polarities with fixed
Alternatively, a plurality of columnar bodies B are connected to the corresponding columnar bodies 13 and side yokes 2, 2' from the coil core 4 via the iron plate E.
This is a technical means in which the magnetic flux is arranged alternately to form a closed loop of magnetic flux.

[Effect]

According to the adsorption device configured as described above, when a DC voltage is applied to the electromagnet to excite the electromagnetic coil, the electromagnetic coils of a plurality of electromagnets arranged in parallel are magnetized to, for example, N pole so that the polarities are aligned in the same direction. Then, coil core → iron plate ---> side yoke → top surface 〓 〓 Rotating body → iron plate Magnetic flux flows with the iron plate, and the magnetic bodies of different polarities become relative S poles, and coil iron core → iron plate ---→ Magnetic bodies with different polarities → 〓 〓 Rotating body Magnetic flux flows with the top iron plate.

Thus, the iron plate to be processed is sufficiently attracted and held between the coil iron core and the iron plate, between the side yoke and the iron plate, and between the magnetic body of different polarity and the iron plate.

In addition, since the rotary body on the lower surface of the magnetic body with a different polarity from the electromagnet is free to rotate and move up and down, and is provided with a spring that protrudes downward, it can be used to hold the iron plate to be processed in any direction, such as front to back, left to right, diagonally, etc. It can be freely moved in any direction, and the suction force can be automatically adjusted depending on the plate thickness.

〔Example〕

One embodiment will be specifically described below based on the drawings.

In Figures 1 to 5, A is the top iron plate 1
It is a long case in which side yokes 2, 2' are fixed to the lower sides of the machine by screws or welding, etc., and the cross section is square.It forms a magnetic circuit. It is equipped with bosses 3 and 3'. M is an electromagnet constructed by winding an electromagnetic coil 6 around a coil core 4 via a coil bobbin 5, and is suspended by a bolt 7 at the center of the inner surface of the upper iron plate 1 of the long case A with a gap on the circumference. It is installed in a hanging manner. B ₁ is a rotating body made of a steel ball or other magnetic material that is installed at the center of the lower surface of the coil core 4 of the electromagnet M. It can freely rotate and move up and down with respect to the coil core 4, and can be rotated in the opposite direction (downward in the figure). ) and each rotating body
B ₁ is provided so as to be magnetizable with the same polarity. That is, the rotating body B ₁ is held in a hemispherical holding case 8 made of magnetic material via a bearing 9 so that it can rotate freely with its lower part exposed, and the holding case 8 is held by a pressing spring 10. The support case 11 is pressed in the anti-adsorption direction (downward in the drawing) and fitted into the support case 11 made of a magnetic material so that it can freely move up and down, and the support case 11 is mounted by drilling a hole in the center of the lower surface of the coil core 4. The rotating body _B1 is embedded and fixed in the recessed hole 12 with an adhesive or the like, with the lower part thereof slightly protruding downward (see FIG. 5). 13 is a columnar body of magnetic material of different polarity, and in the embodiment, the coil core,
As a columnar body having the same height as the side yoke, this columnar body 13 is attached to both sides of the inner surface of the upper iron plate 1 of the long case A in a suspended manner with bolts 14, and has a different polarity with respect to the rotating body _B1. A rotating body made of steel balls or other magnetic material is magnetized by
_B2 is freely rotatable and vertically movable, and is also biased in the anti-adsorption direction (downward in the figure). The mounting structure of the rotating body B ₂ to the columnar body 13 is the same as that of the previously described rotating body B ₁ , so the same reference numerals are given and the explanation thereof will be omitted. The coil core 4 of the electromagnet M equipped with the rotating body B ₁ and the columnar body 13 equipped with the rotating body B ₂ are arranged alternately in the long case A so that the rotating bodies B ₁ and B ₂ become magnetic poles in the magnetized state. However, for example, the rotating body B ₁ is the north pole and the rotating body B ₂ is the south pole, so that the north pole and the south pole alternate (see FIG. 2). Reference numeral 15 designates the bottom cover of the long case A, which is made of non-magnetic stainless steel plate or brass plate, etc., and the upright pieces 16, 16' at both ends are screwed onto the inner surfaces of the side yokes 2, 2' of the long case A. fixed by
An insertion hole 17 is formed in each of the rotating bodies B ₁ and B ₂ so that the lower protruding portions of the rotating bodies B ₁ and B ₂ are slightly projected from the lower surface of the case through the insertion hole 17 . In addition, 18 is a spacing bar, which is used to maintain a constant spacing between the side yokes 2 and 2' of the long case A, and penetrates through the columnar body 13 and attaches bolts 19 and 19' on both sides thereof.
is fixed to the side yokes 2, 2'. Reference numeral 20 denotes a suction roller provided only at the end of the bottom surface of the elongated case A on the entrance side. 21 is a current-carrying electric wire.

In the above configuration, when a DC voltage is applied to the electromagnet M to excite the electromagnetic coil 6, the electromagnetic coils 6 of the plurality of electromagnets M arranged in parallel are magnetized so that their polarities are aligned in the same direction. Therefore, if we unify the direction so that the lower side of the electromagnetic coil 6 is magnetized to the north pole, the magnetic flux will create a closed loop from the north pole to the south pole, as shown by arrows a and a' in Figure 4. flows. That is, the magnetic flux flows as follows: iron plate E → side yokes 2, 2' 〓 〓 〓 〓 〓 〓 〓 〓 〓 rotating body B ₁ → iron plate E → side yokes 2, 2', upper iron plate 1 → iron core 4.

Further, since the mounting portion of the columnar body 13 to which the rotating body B ₂ is attached has a relatively south pole, the magnetic flux naturally flows in the next path as well. That is, arrow b in FIGS. 2 and 3,
As shown in b', the magnetic flux flows as follows: columnar body 13 〓 〓 〓 coil iron core 4 → iron plate E 〓 〓 rotating body B ₂ → columnar body 13 upper surface iron plate 1 → coil iron core 4. Therefore, between the two rotating bodies B ₁ and B ₂ and the other empty part G, that is, between the lower surface of the coil core 4 and the iron plate E, between the lower surface of the side yokes 2 and 2' and the iron plate E, and the columnar body 13
The iron plate E, which is a magnetic material, is sufficiently attracted and held between the lower surface of the iron plate E and the iron plate E. Further, as the iron plate E becomes thicker, the magnetic resistance decreases, so that the magnetic flux passes through it better and the iron plate E is attracted more strongly. At this time, the rotating bodies B ₁ and B ₂ are pushed in the adsorption direction (upward in the figure) against the spring 10, so the empty space G between them and the iron plate E becomes narrower, and the iron plate E gets closer to the magnetic pole and becomes more stable. It is retained by adsorption. Note that since the spring 10 is interposed in the support case 11 and there is a space with a large magnetic resistance, most of the magnetic flux flows from the support case 11 to the holding case 8 to the rotating body B ₁
Alternatively, since the rotating body B ₁ or B 2 and the bearing 9 flow with each other, the degree of magnetic attraction between the rotating body B ₁ or B ₂ and the bearing 9 is small.
Therefore, even if the iron plate E is moved in a state where the iron plate E is attracted, the rotating body B ₁ or B ₂ follows the movement of the iron plate E and rolls easily. That is, the rotating body B ₁ or B ₂ and the bearing 9 attract each other and brake the movement of the rotating body B ₁ or B ₂ , causing slippage between the rotating body B 1 or B 2 and the iron plate E, which causes sliding scratches on the iron plate E. In addition, the pressing force of the spring 10 not only automatically adjusts the suction force depending on the thickness of the iron plate E, but also makes the rolling of the rotating body B ₁ or B ₂ smooth, and the rotating body B ₁ or B ₂ Each serves as a magnetic pole, and by combining these so that the north and south poles alternate, stable adsorption and holding of the iron plate E while maintaining its balance can be always performed.

Next, we will explain the case where the adsorption device of this invention is used as a holding device of a shearing machine.
In FIGS. 6 and 7, a suction device D of the present invention is installed at the rear upper part of the shearing machine F to suction and hold the steel plate E to be cut. Reference numeral 22 is a back gauge that determines the cutting dimensions, and the The movement can be adjusted freely. 23 is a fixed lower blade, 24 is a movable upper blade, and 25 is a plate holder.
The suction device D is connected to the upper surface of the iron plate E to be cut placed on the table T of the shearing machine F, and its rotating body B ₁ ,
It is preferable to install the rotating bodies B ₁ and B ₂ so that the bottom surface thereof is on the same plane as the bottom surface of the iron plate E, or the bottom surface of the rotating bodies B 1 and B ₂ is located slightly below the top surface of the iron plate E. No need to adjust each time
Since the rotating bodies B ₁ and B ₂ can be moved upward against the spring 10 under the magnetic attraction force, if the positions are set for relatively thin objects, the space due to the thickness of the iron plate E can be reduced. The size of part G is a rotating body due to iron plate insertion.
Since the suction action changes naturally due to mechanical pushing up of B ₁ and B ₂ , the suction force is automatically adjusted depending on the thickness and thinness of the iron plate E, and together with this, smooth and reliable suction and holding are always performed without distortion etc. It is something. When the movable upper blade 24 is at the upper limit position, the shearing machine F detects this state with a suitable detector (for example, a limit switch) and excites the electromagnetic coil 6 of the suction device D. Therefore, when the iron plate E on the table T is moved backward, the iron plate E is moved to the rotating body B ₁ of the suction device D,
It is held by suction with _B2 etc. and moves lightly until it hits the back gauge 22 which has been set in advance. When the iron plate E hits the back gauge 22, an appropriate detector (for example, a limit switch) detects this, and the plate holder 25 descends to press and hold the iron plate E, and the movable upper blade 24 is lowered manually or by a foot switch, etc. Keep it moist. Then, the movable upper blade 24 is lowered manually or by operating a foot switch, etc., and when it reaches just before cutting the iron plate E, the electromagnetic coil 6 is de-energized by cutting off the current to the suction device D by an appropriate means. This is to ensure that there is no hindrance to the cutting. In addition, the shearing machine F is equipped with a side gauge (not shown) on one side, and the steel plate E to be cut is moved along this side gauge while keeping it at right angles from the beginning. Depending on the handling, for example, long objects may be
When handling it manually, when it is difficult to insert it along the side gauges at the same time on the left and right sides, it may be necessary to move it laterally and align it along the side gauges before reaching the cutting device. Therefore, by using the suction device D of the present invention, the iron plate E can be freely moved back and forth, left and right, diagonally, etc., which is extremely effective.

8U and V show an example in which a set of two electromagnets M are arranged on the top iron plate 1, and a side yoke 2, which is magnetized with relatively different polarities, is shown in FIGS.
Since there is no iron core like 2', a rotating body is provided on a coil iron core around which an electromagnetic coil is wound so that each coil iron core is magnetized to N and S poles. In this case, magnetic flux can be concentrated on the rotating body to strengthen its attraction force, so it can be applied to relatively large shearing machines, hoisting conveyance machines, etc.

〔Effect of the invention〕

As explained above, this invention maintains the horizontal accuracy of the iron plate etc. to be machined, and
By enabling free movement in left and right directions, diagonal directions, etc. and automatic adjustment of adsorption force depending on plate thickness, it is possible to achieve light and reliable movement, as well as to improve accuracy of cutting dimensions, etc., and workability. When used as a holding device for a shearing machine, it eliminates bending of the steel plate to be cut and efficiently cuts it into specified dimensions, and in addition to automation and labor saving, it fully increases the machine's capacity. It is something that can be demonstrated.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a top-down view of the same, and FIG. 3 is an X--
4 is a Y-Y sectional view of the same, FIG. 5 is a sectional view of the rotating body holding part, FIGS. 6 and 7 are front and side views showing an example of the usage state, and FIG. The figure is an explanatory diagram of different magnetization states. A...Long case, 1...Top iron plate, 2, 2'
... Side yoke, M ... Electromagnet, 4 ... Coil core, 6 ... Electromagnetic coil, B ₁ , B ₂ ... Rotating body, 1
0...press spring, 13...column, E...steel plate to be processed.

Claims (1)

[Claims] 1. A long case A is provided with a cross section formed by a top iron plate 1 and side yokes 2, 2', and an electromagnet M is formed by winding an electromagnetic coil 6, and a rotating magnet M made of a steel ball or other magnetic material is attached to the lower end of the case A. A hemispherical holding case 8 that freely rotatably holds the body B ₁ via a bearing 9 is attached to a coil core 4 to which a magnetic support case 11 is fixed, which is always urged downward by a spring 10, and a coil core 4 at its lower end. A holding case 8 which freely rotatably holds a rotary body B ₂ similar to the above through a bearing 9 is fixed to a support case 11 which is always biased downward by a spring 10 and is magnetized to different polarities. One or more columnar bodies 13 consisting of a coil core 4 are connected to the corresponding columnar bodies 13 and side yokes 2, 2' via iron plates E.
An adsorption device with a rotating body using DC electromagnets, characterized in that the magnets are arranged alternately to form a closed loop of magnetic flux.