JPS63198570A - Conveyor for metal can - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost of a conveyor by disposing the primary stators of first-third linear induction motors at both side of a conveying passage, and displacing the positional relationship of the ends at a distance corresponding to the length of a linear section. CONSTITUTION:In a linear induction motor, primary stators 10, 12 are arranged at both sides of the lower and upper bents 1b, 1d of a guide 1. The stator 10 is composed of a circular-arc body 10a, and a linear section 10b, and the stator 12 is composed of a circular-arc body 12a and a linear section 12b. The two primary stators 10, 12 are disposed in a predetermined size along the bents 1b, 1d, the lower end 1a, and the upper end 1e of the guide 1. Thus, the positional relationship of the ends of the stators is displaced at a distance corresponding to the length Ls of the linear sections 10b, 12b in the direction along a conveying passage 2. As a result, a zero operating magnetic flux to an aluminum can 3 can be eliminated.

Description

Detailed Description of the Invention "Industrial Application Field" This invention is applicable to metals used for vertically transporting lightweight metal cans made of non-magnetic conductor such as aluminum or copper. The present invention relates to a conveying device for cans.

"Prior Art" Generally, in an apparatus for manufacturing metal cans such as aluminum cans, it is necessary to transport the metal cans horizontally or vertically at high speed during the manufacturing process. Conventionally, belt conveyors have been widely used as transport devices for transporting metal cans, but this type of belt conveyor is not only structurally complex but also has many moving parts, and it is difficult to transport aluminum cans. In the manufacturing process of metal cans such as the There was a problem that the work was complicated.

In order to solve these problems, the applicant has previously developed an aluminum can vertical conveyance device that applies the principle of a linear induction motor as shown in FIG. 3, and has achieved great results. In FIG. 3, reference numeral 1 denotes a guide that forms a conveyance path 2 that is slightly wider than the diameter of the aluminum can 3, which is a non-conveyor. It is sent horizontally.

This guide! is the lower end that extends horizontally to the left of the drawing! a, a lower curved portion 1b that curves upward from the right end of the lower end portion 1a, a vertical portion 1c that extends vertically upward (in the direction of arrow U) from the upper end of the lower curved portion 1b, and a vertical portion 1c of the vertical portion 1c. It is comprised of an upper curved part 1d that curves from the upper end to the right in the drawing, and a horizontal part 1e that extends horizontally from the right end of this upper curved part 1d. On both sides of the guide I, primary stators 4a, 4b, 4c, and 4d of the linear induction motor are arranged with their magnetic pole faces facing each other. These secondary stators 4a, 4b, 4c, 4d
Each of these consists of an iron core 5 made of laminated electrical iron plates as shown in FIG. 5, and a winding 6 wound around slots formed in the iron core 5. The side that has been turned becomes the magnetic pole face 5a.

However, the overall shape of the iron core 5 is linear with a length L1 in the -next side stator 4a, linear with a length L (ΦL, /2) in the -next side stator 4b, Stator 4
In c, a quadrant arc shape with a radius R8 is formed in accordance with the outer surface of the curved portions 1 b and 1 d, and in the negative side stator 4 d, a radius n is formed in accordance with the inner surface of the curved portions 1 b and 1 d.
It is formed in the shape of a quadrant arc with e<< no. Then, by supplying alternating current to the windings of the negative side stators 48 to 4d, a magnetic flux that moves over time, that is, a traveling magnetic field is generated on each magnetic pole surface, and this causes the aluminum can 3 to move into the linear induction motor. It becomes a secondary side mover and receives thrust. As a result, as shown in FIG.
is sequentially transferred from the curved portion tb to the vertical portion 1c to the curved portion 1d, and then sent out to the right from the upper end portion 1e.

Here, in the above-mentioned conventional aluminum can vertical conveying device, the distribution state of the magnetic flux density generated by the secondary side stators 4a, 4b, 4c, and 4d is as shown by the dashed line B in FIG. . That is, negative side stator 4 a, 4
At the ends of b, 4 c, and 4 d, the magnetic flux density is almost zero, and when the aluminum can 3 reaches the part where the magnetic flux density is zero, the magnetic flux acting on the aluminum can 3 becomes zero, no thrust is applied in the transport direction, and as a result, the aluminum can 3 stagnates in place. In order to eliminate such a problem, as shown in FIG. 4, negative side stators 4a, 4a.

The relative positional relationship between the mutually opposing parts of...
They are arranged to be shifted by a predetermined distance in the direction along the conveyance path 2 (same direction as the arrow U), so that the opposing primary side stators 4 a, 4 a, . . . are arranged at their respective ends. The structure is such that they mutually compensate for the decrease in magnetic flux density at .

"Problems to be Solved by the Invention" By the way, in the above-described conventional aluminum can vertical conveying device, the vertical portions of the guides 1 where the next-side stators 4a, 4a, . . . Regarding ICs, the above-mentioned considerations are made so that the magnetic flux density does not become zero. However, as shown in FIGS. 3 and 4, the secondary stator 4a.

4b and the arc-shaped primary stators 4c and 4d are adjacent to each other, due to their structure, it is possible to avoid the presence of a portion where the magnetic flux density becomes zero (portion indicated by C in the figure). A solution was desired. Also, if the length of the straight primary stator 4a is the standard length, then the secondary stator 4b with a shorter length than this length is manufactured separately. This has the drawback of increasing manufacturing costs.

This invention was made in view of the above-mentioned circumstances, and has a structure that does not have any moving parts, prevents the metal cans that are the objects to be conveyed from becoming stagnant on the way, and further reduces manufacturing costs. The purpose of the present invention is to provide a conveying device for metal cans that achieves a

"Means for Solving the Problems" This invention provides a primary stator of a linear first linear induction motor on both sides of a conveyance path having a straight portion and a curved portion;
a primary side stator of a second linear induction motor comprising a main body portion having a curved shape along the outer surface of the curved portion of the conveyance path and a straight portion extending from an end portion of the main body portion; The primary stator of the third linear induction motor, which is composed of a main body section having a curved shape along the inner surface of the curved section of the road and a straight section extending from the end of this main body section, is connected to the primary stator of the third linear induction motor. are arranged so as to face each other, and the primary side stators of the second and third linear induction motors are arranged such that their respective ends are aligned with each other along the conveyance path by the length of the straight part. It is characterized in that they are arranged so as to be shifted by a distance corresponding to the size.

"Function" The primary stator of the first linear induction motor, and the second motor consisting of a main body section curved along the outer surface of the conveyance path and a straight section.
A primary stator of a linear induction motor, and a primary stator of a third linear induction motor, which consists of a main body portion curved along the inner surface of the conveyance path and a straight portion, are arranged on both sides of the conveyance path. By doing so, the positional relationship of the ends of the first, second, and third secondary stators facing each other is adjusted in the direction along the conveyance path by the length dimension of the straight portion. As a result, the decrease in magnetic flux density at the end of each secondary stator is compensated for by each other, and the magnetic flux acting on the metal cans that are the transported objects becomes zero. can be completely eliminated. Also, -
As the next stator, in addition to the 2F1 type curved primary stator, conventionally manufactured primary stators with a fixed length can be used, reducing manufacturing costs. It will be planned.

Embodiment J An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. In this figure, the difference from the conventional aluminum can vertical conveyance device shown in FIG. 3 is that a new primary stator 10 and 12 are arranged. The above-mentioned secondary stator 10 includes a main body part 10a having the same configuration as the conventional primary stator 4c and having a quadrant arc shape with a radius R1, and this main body part 10a.
A straight portion 10b having a length dimension Ls extends from the end of the straight portion 0a. Also, the above-next stator! 2 is the radius R of the same configuration as the conventional primary stator 4d.
An arc-shaped body portion 12a having a quadrant of 7, and this body portion 12
A straight portion 12b having a length dimension Ls extends from the end of the portion a.

Then, the two primary stators IO, 10 move their main body parts 10a to the curved part of the guide l! b and! along the outer surface of d, and those straight parts 10b as guide l
The two primary stators I2 have their main bodies 12a aligned with the inner surfaces of the curved parts 1b and 1d of the guide 2, and These straight portions +2b are arranged along the vertical portion 1c of the guide 1. Furthermore, these secondary stators I
Adjacent to O and 12 is a linear primary stator 4a.

4a, . . . are arranged in sequence.

With the above configuration, all the primary stators 4a, 4a, .
..., I O, + 2. The positional relationship of the end portions of the opposite ends of . Therefore, as shown in FIG. 2, all the primary stators 4a, 4a, .

+0.12. ... are in a state where they mutually compensate for the decrease in magnetic flux density at each end, and it is possible to completely eliminate points where the magnetic flux acting on the aluminum can 3 becomes zero, and the aluminum can 3
will no longer be stagnant. In addition to the arc-shaped primary stators 10 and I2 having two types of radii R1 and R1, a secondary stator 4a having a fixed length and a conventionally manufactured secondary stator 4a is combined. This eliminates the need to separately prepare primary stators with different length dimensions.

In the above embodiment, the aluminum can 3 is used as an example of the object to be transported, but the object to be transported may also be a copper can or the like, and its shape may be various such as cylindrical, cylindrical, plate-like, etc. A possible shape is .

"Effects of the Invention" As explained above, according to the present invention, the primary stator of the linear first linear induction motor is provided on both sides of the transport path, and the primary stator of the linear first linear induction motor is provided on the outer surface of the curved portion of the transport path. a primary side stator of a second linear induction motor consisting of a main body section having a shape curved along the line and a straight section extending from an end of the main body section; a primary stator of a third linear induction motor consisting of a main body portion having a shape such as that of the main body portion and a straight portion extending from an end portion of the main body portion, respectively, arranged so that their magnetic pole faces face each other, and the primary side stators of each of the second and third linear induction motors are arranged such that their respective ends are shifted from each other in the direction along the conveyance path by a distance corresponding to the length of the linear part. Because of this arrangement, the decrease in magnetic flux density at the end of each secondary stator is compensated for by each other, completely eliminating the location where the magnetic flux acting on the metal cans that are the transported objects becomes zero. This allows metal cans to be transported extremely smoothly without any stagnation. Furthermore, as the negative side stator, ZF
In addition to the curved primary stator of the IT class, a conventionally manufactured primary stator with a fixed length can be used, and as a result, manufacturing costs can be kept low. is obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view of the configuration of an embodiment of the present invention, FIG. 2 is a diagram for explaining the distribution of magnetic flux density in the same embodiment, and FIG. 3 is a diagram showing the configuration of a conventional vertical aluminum can conveying device. 4 is a diagram for explaining the distribution state of magnetic flux density in the conveying device, and FIG. 5 is a perspective view for explaining the general structure of the primary stator of the linear induction motor. . l...Guide! b...Lower curved part, Ic.
... Vertical part (straight part), ~ld ... Upper curved part, 2 ... Conveyance path, 3 ... Aluminum can (metal can [1), 4a...-Next stator (primary stator of the first linear induction motor), IO・
...-Next stator (second primary stator),! 2
......-Next stator (third primary stator), 1
0a, 12a... Main body, IQ, b, 12b.
...Straight section.

Claims (1)

[Claims] A primary side stator of a linear first linear induction motor is disposed on both sides of a conveyance path having a straight portion and a curved portion, a main body portion having a curved shape along the outer surface of the curved portion of the conveyance path, and a primary stator of the second linear induction motor consisting of a straight portion extending from an end of the main body; a main body curved along the inner surface of the curved portion of the conveyance path; and a primary side stator of a third linear induction motor consisting of a straight portion extending from an end thereof, respectively, are arranged such that their magnetic pole surfaces face each other, and the second and third
The primary stators of each of the linear induction motors are arranged such that their respective ends are shifted from each other in the direction along the conveyance path by a distance corresponding to the length of the linear part. Conveyance device for cans.