JPS5823270B2 - Magnetic continuous transport method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a magnetic type vehicle in which a moving body equipped with a magnet is attracted to and follows a magnetic belt conveyor unit which is rotated by a driving source, and is transported along a desired traveling route. Regarding transportation methods.

As shown in Fig. 1, this type of system, which has already been proposed, consists of a multi-magnetic belt conveyor unit consisting of a driving wheel (a) rotated by a drive source (not shown) and a magnetic belt (c) around the driven wheel. dm a', att...1...
A magnetic belt conveyor line f is formed by extending along the running path e, for example, to the side thereof, and on the other hand, a magnet is ...... is installed t7.

・Alternatively, in this case, the magnet is i'... is installed on the bottom of the moving body, and the magnetic belt conveyor line f is also placed on the running path e so that the load of the moving body is not applied. Of course, it may be arranged between supporting wheels that roll while bearing the vehicle load.

In either case, the vehicle load is not applied to the magnetic belt.

And these magnetic belt conveyor units d.

d'sd//..., the magnetic belt c is set at a predetermined rotational speed v1. v2. v3...
・・■(In the acceleration section, vl ku v2〈■3...(vn,
In the deceleration section, vl>v2>v3...)vn, and in the constant velocity section, v1=V'2''V3...
-vn), and the magnets i and i' of the moving body g are magnetically attracted to the magnetic belt c so that they come into close contact with each other or are attracted to each other, and the attraction makes the moving body magnetic. Belt conveyor d.

d/d//,..., following the laps of the driving route e.
The vehicle is driven by support wheels not shown in the figure.

However, in the conventional transportation method, the moving body magnets i, i
'..., for example, the moving body transfers from the magnetic belt conveyor unit) d in the acceleration section to the magnetic belt conveyor unit dl, which is driven at a circular speed v2 that is higher than its circular speed v1. When the magnet of the moving body moves at the rotation speed v1 of the unit d on the rear side, h
'... is in contact with the magnetic belt c in the unit d on the front side, so the magnet I
If a slip occurs between the attracting surface of s1'... and the magnetic belt 0 of the unit d', this slip will not only cause sliding noise but also damage between the magnet and the magnetic belt. Since wear would occur, measures had to be taken to control this and to prevent the noise caused by sliding from propagating to the outside world.

In this case, if the magnet and the magnetic belt are attracted to each other so that they are not in contact with each other, the above-mentioned difficulty in generating sliding noise can be avoided. However, since there is a gap between the magnet and the magnetic belt, the magnetic flux density can be further reduced. The magnets i, i', etc. of the moving body move one after another to the unit d' on the forward side, and finally the unit d' moves the moving body. Therefore, when the speed is accelerated from the previous speed v1 to the speed v2, a fairly rapid change in production occurs as shown in Fig. 2, and this causes a defect that worsens the ride comfort of the moving body. In order to solve this problem, it is necessary to appropriately set the length of the vehicle's magnets and the spacing between the magnets, or to reduce the speed difference between vl and v2 considerably, and to increase the amount of magnetic A belt conveyor unit had to be installed.

In view of the drawbacks of the method in which acceleration and deceleration in the magnetic belt conveyor line f is performed by slipping between the magnet and the magnetic belt, the present invention has been developed to improve the speed of the magnetic belt conveyor from the rear magnetic belt conveyor unit to the front magnetic belt conveyor unit. When the head magnet of a moving object enters the unit, the magnetic attraction state with the same unit on the other side is ensured by the magnet alone, and an induction motor is adopted as the drive source of the magnetic belt conveyor unit. Therefore, the present invention aims to provide a transportation system that makes use of the slippage of the rotor of the electric motor and the torque characteristics with respect to the load to reduce the slippage between the magnet and the magnetic belt and that can perform smooth acceleration and deceleration.

The present invention will be described in detail with reference to FIG. 3 and subsequent figures. This figure shows a case in which the magnetic belt conveyor line is provided on the side of the traveling path as in FIG. The figure shows a state in which the moving body 3 has just entered the same unit 2 on the forward side from the same unit 1 on the rear side, and in the figure, 4° 4', 5.5', 6.6' indicate both units, 1 and 2 respectively show a driven wheel, a driving wheel, and a magnetic belt, and the driving wheels 5 and 5' are induction motors that can be started at the rated voltage □
Using the machines 7 and 7' as driving sources, the orbiting speeds are as follows:■1. V
2 (vl + v2) is the driving part, 8 is its AC power supply, 3'
are the wheels of the moving body 3.

In the present invention, as shown in the figure, the movable body 3 is magnetically attracted to and follows the magnetic belt conveyor unit 1 on the rear side in the direction of the arrow A, and the leading part magnet 9 of the body 3 follows the magnetic belt conveyor unit 2 on the forward side. By making sure that the magnet 9 has sufficient magnetic force when the magnetic belt 6 enters the
As a result, the induction motor T' that is the drive source of the unit 2 bears the full load from the moving body 3 and the rotating magnetic belt 6', and therefore the rear unit 1 This is done so that the induction motor 1', which is the drive source, is in a no-load state.

Once the induction motor 7' of the magnetic belt conveyor unit 2 is fully loaded in this way, as can be understood from the slip S-torque characteristic of the induction motor shown in FIG. The induction motor 7', which was rotating the magnetic belt 6' at a speed v2, temporarily changed to the traveling speed v'1 of the moving body 3, where the rear induction motor 7 was rotating under load.
The moving body 3 is slid and decelerated to (v'1<vl), then accelerated until it produces a torque corresponding to the load shown in the figure, and enters stable operation at equilibrium point B. v′2〈v
It will travel at the traveling speed of 2).

Therefore, according to the method of the present invention, as shown in FIG. 6, the moving body 3 is sequentially accelerated from V' to V'2 and further by the magnetic belt conveyor unit on the forward side (not shown), so that the acceleration is not shown in the figure. If an acceleration curve C like this is drawn, it becomes \, and therefore smoother acceleration and deceleration can be achieved than in the case shown in FIG.

Furthermore, when the induction motor 7' on the forward side accelerates the load as described above, the trailing part magnet 9 of the moving body 3
'99//... is in a state of adsorption with the magnetic belt 6 on the rear side, so the induction motor I on the rear side is accelerated to a speed that is smaller than its rotational speed V1, and the motor 7 operates as a generator and generates excessive voltage.

Therefore, in the present invention, the drive wheels 5, 5 are
' is equipped with a clutch mechanism 10 as shown in FIG. Alternatively, as shown in FIG. 3, the rotational speed of the drive wheels 5 is detected by a speed detector 13, and the controller is controlled based on the detection signal.

14 and disconnecting the induction motor 7 from the AC power source 8, the operation of the rear drive source as a generator can be controlled by appropriate mechanical and electrical means.

Furthermore, the induction motor used in the present invention includes:

Rotor groove 15.1 in Fig. 7 than a normal box type induction motor.
It is desirable to use a special box type induction motor known as the double box type or the deep groove type shown in Fig. 5'.

As shown in Figure 8, this is the very torque characteristic (■) of a normal box-type induction motor and the same characteristic (11) of a special box-type induction motor.
), and (11) is more similar to the characteristics shown in Figure 5 than ([), with less speed fluctuation due to load, smoother acceleration/deceleration, and less resistance to overload. 3. As described above, the present invention uses a magnetic transportation system, and uses induction motors 7 and 7' as the drive sources for the magnetic belt conveyor units 1 and 2, and the speed When the leading part magnet 9 of the movable body 3 enters from the rear side to the forward side between adjacent magnetic belt conveyor units 1 and 2 having a difference, the magnet 9 is in a magnetically attracted state with the forward side. At the same time, the five drive sources on the rear side are placed in a no-load state, and the fully loaded drive source is accelerated and decelerated until the drive source generates a torque commensurate with the load, and the rear side (1) The operation of the drive source as a generator is controlled by electrical or mechanical means, so there is no sliding between the magnet and magnetic belt as in the conventional system, and therefore pollution caused by sliding noise is eliminated. The problem of wear and tear due to sliding is also solved, and the sliding characteristics of the induction motor can be effectively utilized.
Since acceleration and deceleration can be performed smoothly, it is possible to provide a transportation method with good riding comfort.

[Brief explanation of drawings]

Fig. 1 is a plan view of a magnetic belt conveyor line using the conventional magnetic transport method, Fig. 2 is a traveling speed diagram of a moving object showing the acceleration state using the same method, and Fig. 3 is a diagram using the same method of the present invention. FIG. 4 is a plan view showing the main parts of a magnetic belt conveyor line, and FIG. 4 is a plan view showing an embodiment of the drive wheels of a magnetic belt conveyor unit of the same type. FIG. Berry torque characteristic diagram, Figure 6 is a running speed diagram of a moving object showing the acceleration state by the same method,
Figure 7 shows the rotor grooves of a special box-type induction motor, A is a double box type, and the mouth is a deep groove type, respectively. It is a torque characteristic diagram. 1.2... Adjacent magnetic belt conveyor unit, 3... Moving body, 7, 7'... Induction motor, 9... Leading part magnet , S...Slip of induction machine.

Claims (1)

[Scope of Claims] 1. A magnetic belt conveyor line is formed by extending a desired number of magnetic belt conveyor units which are rotated by a driving source, and a moving body is formed which can freely run on a traveling path along the line. A magnet with a steady magnetic force is provided, and the magnetic attraction force between the magnet and the magnetic belt conveyor unit causes the moving object to follow the rotation of the unit, and the speed difference between the rotation speeds of adjacent magnetic belt conveyor units is In a continuous transportation system in which the moving body is accelerated or decelerated by setting When the leading magnet of the moving body enters from the front side to the front side, the magnetic adsorption state with the front side is ensured by the magnet alone, and the drive source on the rear side is placed in a no-load state, and the full load is maintained. The drive source is controlled by electrical or mechanical means so that the drive source on the front side, which has been subjected to a load, is accelerated or decelerated until it generates a torque commensurate with the load, and the drive source on the rear side operates as a generator. A magnetic continuous transport system characterized by the following. 2. Magnetic continuous transportation according to claim 1, characterized in that a double box type or deep groove type special box type induction motor is adopted as the induction motor used as the drive source of the magnetic belt conveyor unit. method.