JPH0479931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic conveyor that can efficiently transport chips discharged from, for example, a machine tool while separating them from cutting oil.

(Prior art) Conventionally, this type of conveyor has a fixed cylinder and a rotating cylinder that have a double structure with an inner and outer structure, and a magnet piece is pasted in a spiral shape on the outer circumferential surface of the rotating cylinder on the inner side, and the magnetic force is applied to the inner side of the conveyor. Therefore, there is a device in which the objects to be conveyed, such as chips, which are attracted to the circumferential surface of the fixed cylinder, are moved and conveyed along the circumferential surface of the fixed cylinder in synchronization with the rotation of the rotating cylinder.

(Problems to be Solved by the Invention) However, in this conventional conveyor, a large number of magnet pieces are attached to the circumferential surface of the rotating cylinder in stages, and the magnetic poles of these adjacent magnet pieces are arranged with opposite polarities. Since objects were conveyed one after another by the suction force of adjacent magnetic pieces, the conveyance of the conveyed objects depended on the magnetic force and arrangement of the individual magnetic pieces, and the process of conveying the objects depended on the magnetic force and arrangement of the individual magnetic pieces. For example, there is a limit to the conveyance of powdered chips, etc., which can only be moved back and forth between adjacent magnet pieces, and cannot be continuously moved and carried out of the fixed cylinder. Ta.

Therefore, in the past, there is a technique disclosed in Japanese Patent Publication No. 54-2756, for example, as a technique for improving such drawbacks. This consists of a plurality of conveyance rollers that are rotatably arranged side by side, an inner cylinder fixed inside these rollers, and a magnet piece that is adhesively fixed to the half circumference of this inner cylinder, so that the magnet is attracted to the circumference of the conveyance roller. The conveyed object is moved along with the roller in the rotation direction, and the conveyed object that has been moved to the magnet position at the half-circumference end is adsorbed and moved to the adjacent conveying roller, and the conveyed object is sequentially transferred to the downstream roller. I tried to transport the items while handing them over.

However, although this conventional device can transport large objects, it is difficult to transfer small objects to adjacent transport rollers, and they often fall between the transport rollers and fall below the rollers. There is a problem in which the rollers are prevented from rotating due to the accumulation of
Furthermore, since this device requires a large number of conveying rollers and their drive mechanisms, the device has a complicated structure and is large and heavy, which hinders its versatility.

It is an object of the present invention to provide a magnetic conveyor that can eliminate these conventional drawbacks, efficiently convey large and small objects, and has a simplified structure to reduce its size and weight. It is said that

(Means for Solving the Problems) Therefore, the magnetic conveyor of the present invention has a plurality of shafts that are rotatable in opposite directions and arranged parallel to each other and spaced apart from each other, and strip-shaped magnets are installed on the peripheral surfaces of these shafts. are mounted in a helical shape, and the winding directions of the magnets on opposite or adjacent shafts are different from each other, while the magnetic poles of the magnets on all shafts are magnetized to the same polarity. It is characterized in that a magnetic object is transported by the repulsive force of the magnet generated between the two.

(Example) Hereinafter, illustrated embodiments in which the present invention is applied as a chip conveying device will be described.
In the figure, reference numeral 1 denotes a separation tank that stores chips, which are objects to be conveyed discharged from machine tools, together with cutting oil attached to them.The chips and cutting oil are separated. The lower end of the magnetic conveyor 2, which is installed so as to be inclined upward, is housed therein.

The magnetic conveyor 2 has its circumferential surface oil-tightly covered with a protective cover 3, which is formed by bending a magnetically permeable member, such as a thin stainless steel plate, and has an inverted U-shaped cross section at each end. The cylindrical parts 3a, 3a are arranged, and these are connected by a flat sliding part 3b, and the bottoms of the cylindrical parts 3a, 3a and the sliding part 3b, and the lower ends of the cylindrical parts 3a, 3a are connected. The openings are fixed with a bottom plate 4 of the same quality as the openings, thereby forming an oil-tight structure.

Reference numerals 5 and 5 denote protective outer cylinders made of a magnetically permeable material such as stainless steel pipes, which are housed in the cylindrical parts 3a and 3a, and long shafts 6 and 6 are rotatably housed inside them. . The shafts 6, 6 are made of iron pipes in the embodiment, but they may also be solid members made of ferromagnetic or paramagnetic material, or even solid or hollow members made of diamagnetic material. It's okay. A band-shaped magnet 8 is provided on the outer circumferential surface of the shafts 6, 6, in which a large number of magnet pieces 7 are successively bonded and arranged in a helical shape.

As shown in FIG. 6, the magnet piece 7 is formed into a plate having a curved inner surface 7a that can be brought into close contact with the outer peripheral surface of the shaft 6, and adjacent magnet pieces 7, 7 are adhesively fixed to both ends of the plate. On the other hand, their inner surfaces 7
a and 7a are adhesively fixed to the outer peripheral surface of the shaft 6 to form a continuous helical magnet 8 as shown in FIG.
It consists of In this case, the magnet 8 is not constructed by gluing together a large number of magnet pieces 7;
For example, it is possible to use an integrally molded helical magnet 8, or it is also possible to accommodate a liquid magnet in a helical protective tube.

The magnets 8, 8 are wound in opposite directions around the circumferential surfaces of the shafts 6, 6, and their pitches are the same, and they are arranged at opposing positions on the shafts 6, 6. The winding phases match with each other so that the magnet pieces 7, 7 are always at the same height. The magnetic poles of the magnets 8, 8 to which the magnet pieces 7 are bonded and fixed in this way are magnetized to the same magnetic pole, and a repulsive force is applied between them.

Reference numerals 9 and 10 indicate support shafts that are fixed integrally with the shafts 6 and 6. The support shafts 9 and 9 provided at the lower end of the shaft are supported by a bearing 11, and the support shafts 9 and 9 provided at the upper end of the shaft are supported by a bearing 11. axis 1
Gears 12 and 13 are fixedly installed on the shafts 10 and 10, and these gears 12 and 13 are in mesh with each other.The shaft end of one of the support shafts 10 is connected to a motor connected to a reduction gear via a coupling ring. 14 are connected to each other, allowing the gears 12 and 13 to rotate at the same speed in opposite directions.

Reference numeral 15 denotes a notch formed at the upper end of the sliding portion 3b, and a suction roller 16 made of a magnetically permeable member such as a stainless steel pipe is installed at the position of the notch 15.

That is, as shown in FIG. 7, the suction roller 16 is disposed close to the upper edge of the sliding portion 3b, and an inner cylinder 18 that can rotate in synchronization with the shaft 17 is provided inside the suction roller 16. A semicircular tubular magnet 19 is attached to the semicircular surface, and the sliding portion 3b is
Chips, which are the upper conveyed object 20, are adsorbed to the peripheral surface and then transported out.

In addition, 21 in the figure is a bevel gear fixed to one end of the shaft 17, and one support shaft 1 to which the gear 13 is fixed.
It meshes with the bevel gear 22 which is fixed at 2.
Reference numeral 3 designates a scraper whose end portion is disposed on the circumferential surface of the suction roller 16, reference numeral 24 designates a conveyed object storage container installed below the scraper 23, and reference numeral 25 represents a support member.

(Function) In the magnetic conveyor configured in this way, the conveyed material 20 discharged from the machine tool is accumulated around the lower end of the magnetic conveyor 2 housed in the separation tank 1 or is floating in the cutting oil. Some of them receive the repulsive force of the magnets 8, 8 that pass through the protective outer cylinder 5 and the protective cover 3, and gather at the sliding portion 3b, but before the motor 14 is driven, an upward force is applied to them. Since it is not working, the object to be transported 20 is not transported.

Next, when the motor 14 is driven and the gears 12 and 13 are rotated in the direction of the upper arrow in FIG.
The shafts 6, 6, which are integral with the support shafts 10, 10 to which the shafts 2, 13 are fixed, rotate at the same speed in opposite directions, and the shafts 6, 6
The magnets 8, 8 fixed to the magnets 8, 8 move helically in opposite directions to displace the opposing magnet pieces 7, 7 upward. Therefore,
Located at the lower end of the sliding portion 3b, the magnet 8,
The conveyed object 20, which had been receiving the repulsive force of 8, will now receive an upward repulsive force due to the above-mentioned displacement of the magnet pieces 7, 7. Therefore, the conveyed object 20 will be moved by the sliding portion 3b at the same speed as the upward velocity component of the magnets 8, 8. move above.

In this case, the magnets 8, 8 are arranged at the same pitch, and the opposing magnet pieces 7, 7 are always displaced to the same height position, so the facing distance between the magnets 8, 8 is always maintained at the minimum distance, and the magnets 8, 8 are arranged at the same pitch. Maximize the resultant force of the magnetic force, or repulsion, between the two. Moreover, such a repulsive force is generated continuously while the motor 14 is driving, and is applied to the conveyed object 20, so that the conveyed object 20 is pushed against the sliding portion 3.
It moves upward while gathering in the center of b. At that time, the sliding portion 3b moves the object 2 through a certain slope.
0, the gravitational component acting downward on the conveyed object 20 is reduced, and the magnets 8, 8
Since the burden on the object 20 is reduced, the transportation of the object 20 is facilitated. Furthermore, during such transportation, the cutting oil and the like adhering to the transported object 20 fall into the separation tank 1 along the sliding portion 3b due to the action of gravity, and the oil is separated. While the oil can be easily recovered, the weight of the object 20 to be transported is reduced accordingly, so that in conjunction with the above, the transportation of the object is facilitated.

On the other hand, as the motor 14 is driven, its torque is transmitted to the shaft 17 from the bevel gears 22 and 21 via the gears 12 and 13 and one of the support shafts 10, and the inner cylinder 18 integrated with the shaft 17 rotates. do. Inner cylinder 1
8 has a magnet 19 attached to its half circumferential surface, and its magnetic force passes through the suction roller 16 and acts at all times. It will be formed for the first time. That is, the conveyed object 20 that moves upward along the sliding section 3b and reaches the upper end thereof is attracted by the magnetic force of the magnet 19, and when it is attracted to the circumferential surface of the attraction roller 16, the rotational speed of the magnet 19 increases. It moves on the circumferential surface of the roller 16 in synchronization with , is peeled off from the circumferential surface of the roller 16 by the position of the scraper 23, falls into the container 24, and is stored therein.

In this embodiment, a pair of shafts 6 to which magnets 8 are attached are provided, but this is not limited to this example. It is also possible to arrange a plurality of shafts 6 in a row or in a ring, and to attach magnets 8 to each of them. It is.

(Effects of the Invention) As described above, the magnetic conveyor of the present invention has the following features:
A plurality of shafts that can rotate in opposite directions are arranged parallel to each other and separated from each other, and belt-shaped magnets are attached to the circumferential surfaces of these shafts in a helical shape, and the winding directions of the magnets of the opposing shafts are set to be parallel to each other. On the other hand, the magnetic poles of the magnets on all axes are magnetized to the same polarity, and the magnetic objects to be transported are transported using the repulsive force of the magnets, so regardless of the size of the transported objects, First, it has the effect of being able to convey this efficiently and with high accuracy.

In addition, the present invention has a simple structure, a small number of parts, and a single drive mechanism, making it easier to manufacture than conventional conveyors of this type, making it smaller and lighter, and making it more versatile. It has the effect of promoting sex.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figures are a sectional view taken along the line A-A' in Fig. 1, Fig. 3 is a sectional view taken along the line B-B' in Fig. 1, Fig. 4 is a perspective view showing the main parts of the present invention, and Fig. 5 6 is a perspective view showing an example of a magnet piece used in the invention, and FIG. 7 is a sectional view showing an example of a suction roller used in the invention. It is. 6...Axis, 8...Magnet.

Claims (1)

[Claims] 1 A plurality of shafts that can rotate in opposite directions are arranged parallel to each other and separated from each other, and band-shaped magnets are attached to the peripheral surfaces of these shafts in a helical shape, and the winding direction of the magnets of the opposing shafts is 1. A magnetic conveyor characterized in that the magnetic poles of the magnets on all the shafts are magnetized to the same polarity while the magnets are different from each other.