JPS61177103A - Traveling vehicle - Google Patents

Abstract

PURPOSE:To smoothly insert a secondary conductor into a stator without possibility of contacting with the stator by providing guide means for inserting the conductor between stators before the conductor inlet of the stator. CONSTITUTION:A truck 1 stands a reaction plate 3 of the secondary conductor on the lower end of a casing capable of placing an article. A propulsive force is applied to the plate 3 on the basis of a magnetic flux generated from a stator 9. The railway of the truck 1 is formed by opposing guide rails 7 in such a manner that the open ends of U-shape are opposed inward. Guide means 10 for inserting the plate 3 into a railway 20 is provided before the conductor inlet 20A of the railway 20 for the plate 3 formed of the stator 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention is directed to a vehicle in which a traveling body travels by inertia using a propulsive force or a reverse propulsive force given from a thrust imparting means.

This invention relates to a traveling device that is stopped.

[Technical Background of the Invention and Problems Therewith] A linear induction motor is an example of a device that causes a traveling body to travel using the propulsive force or reverse propulsive force produced by a thrust applying means. In a conveyance system using a linear induction motor, a reaction plate, which is a secondary conductor, is provided on the traveling body, and a stator, which is a thrust imparting means, is arranged at a predetermined interval on the travel path of the traveling body. Then, a power supply device excites a coil provided in the stator to apply a time-varying magnetic flux to the reaction plate, and this change generates a constant propulsive force or reverse propulsive force in the reaction plate, causing the traveling body to travel. Can be stopped.

By the way, in the above-mentioned traveling device, if the secondary conductor and the stator were to come into contact with each other while the traveling body was traveling, this would lead to damage to the secondary conductor and the stator, and furthermore, the linear induction motor would not operate normally.

Therefore, in particular, in a system in which two stators are arranged with a predetermined gap and the secondary conductor moves through the gap between the stators (double-sided linear motor), it is important to know how to introduce the secondary conductor into the stator. The problem is how to guide the secondary conductor.

As a conventional guide means for a secondary conductor, for example, -
There is one that has two sets of rollers on both the front and rear sides of the stator.

However, in the case of this guide means, the introduction angle at which the secondary conductor enters the stator is not necessarily parallel to the opposing surfaces of both stators; As a result, there was a problem in that the secondary conductor came into contact with the wall surface of the stator, causing damage and abnormal operation of the linear induction motor.

[Object of the Invention] The present invention has been made in view of the above circumstances, and provides a traveling device that can smoothly introduce a secondary conductor into a stator without fear of contact with the stator, and can contribute to accident prevention. The purpose is to provide

[Summary of the Invention] The summary of the present invention for achieving the above object is to provide a traveling device that runs or stops a traveling body having a secondary conductor using a propulsive force or a reverse propulsive force given from a stator. By providing a guide means that is provided in front of the conductor inlet section and introduces the secondary conductor between the stators by aligning the running path of the secondary conductor formed by the stator with the running direction of the secondary conductor, the secondary conductor can be introduced between the stators. This is characterized by regulating the running direction of the secondary conductor before the conductor enters the stator to prevent contact accidents.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment relates to a traveling device using a linear induction motor. Fig. 1 is a schematic perspective view of the running body and guide rail, Fig. 2 is a vertical cross-sectional view of the running body, guide rail, and linear induction motor, and Fig. 3 is a cross-sectional view, not showing the B-8 section in Fig. 2. ,
FIG. 4 is an explanatory diagram of the operating principle of the beam near induction motor.

In FIGS. 1 and 2(a), a traveling body 1 has a reaction plate 3, which is a secondary conductor, erected at the lower end of a casing 2 on which articles can be loaded. This reaction plate 3
is a metal plate made of copper, aluminum, etc., and is adapted to be provided with propulsive force or reverse propulsive force based on magnetic flux generated from a stator 9, which will be described later. In addition, two wheels 4, each serving as a guided member, having a circumferential surface protruding beyond the width of the housing 2 are provided on the leading end side and the trailing end side of the traveling body 1 in the traveling direction A. Four have been distributed.

Further, on both sides of the housing 2 in the traveling direction A of the traveling body 1, a total of eight wheels 5, which are guided members, are arranged on one side, two on each side on the upper and lower sides. The running path 6 of the running body 1 is
It is formed by arranging guide rails 7.degree. 7 each having an opening shape in cross section and facing each other with the opening ends of the openings facing inward. The separation distance a between the inner surfaces 7a and 7c of the guide rail 7.7 is
It is slightly longer than the length b in the width direction of the traveling body 1 formed by the wheels 4°4. Moreover, the separation distance C formed by the face-shaped opposing surfaces 7b and 7c of the guide rail 7 is slightly longer than the distance d from the upper end to the lower end of the wheels 5, 5, which are arranged vertically to face each other.

The inner surface 7a and the opposing surfaces 7b and 7c are guide surfaces for the wheel 4.5, which is the guided member.

A linear induction motor 8 is provided below the travel path 6. This linear induction motor 8 consists of a reaction plate 3 as a movable element attached to the housing 2, and a pair of stators 9.9 as stators disposed opposite to each other across the running path of the reaction plate 3. It has become. As shown in Figure 2 (a) and Figure 3, the stator 9゜9 is made by laminating electric iron plates with teeth and grooves punched out, and coils are wound around the multiple grooves. , a gap of a certain distance g is provided between the reaction plate 3 and the stator 9.

A guide means 101fi for introducing the reaction plate 3 into the running path 20 is provided in front of the secondary conductor entrance portion 2OA of the running path 20 for the rear crayon plate 3 formed by both stators 9.9. ing.

This guide means 10 consists of two sets of rotating bodies 11A, 118 and 12 arranged so that their outer peripheries face the running path of the reaction plate 3 and their axes are vertical.
It consists of A and 12B.

Rotating body 11A and rotating body 1 facing each other across a running path
An interval t1, in which the thickness [0 is slightly larger than that of the reaction plate 3], is set at the outer periphery of each of the 1B1 rotary body 12A and the rotary body 12B.

Moreover, the rotating body 11A and the rotating body 1 adjacent to each other along the running path
A certain distance is set between the 2A1 rotating body 11B and the rotating body 12B, corresponding to the length of the reaction plate 3 in the running direction.

Each of the rotating bodies 11A, 11B, 12A, and 12B is made of a nonmagnetic and insulating material (for example, plastic, rubber, etc.). In FIG. 1, 13A and 13B are guide rollers disposed outside the exit sides of the stators 9, 9.

Here, the principle of generation of propulsive force or reverse propulsive force by the linear induction motor will be briefly explained with reference to FIGS. 4(a) and 4(b). FIG. 4(a) is a schematic perspective view of a flat plate-like one-sided type linear induction motor as an example, and FIG. 4(b) is a characteristic diagram showing the relationship between magnetic flux bg and eddy current jr. When a two-phase or three-phase alternating current is passed through the coil of the stator 9, the instantaneous value ba (T) of the magnetic flux density at the gap is expressed as bo=Ba cos(ω[-πχ/τ) where the peak value is Bg. So, ω=
2πf: Angular frequency of power supply (rad/S) f: Frequency (H
z) [: Time (S) χ: Distance on the stator surface (m) τ: Pole pitch (W). The ball pitch τ is the length of a half period of magnetic flux density. Furthermore, since the magnetic flux generated from the stator 9 is alternating current, all eddy currents are generated in the reaction plate 3, which is a movable element, according to Lenz's law. Figure 4 (a
) The * mark and the X mark shown in the cross section of the illustrated reaction plate 3 represent the direction in which eddy current flows and its magnitude.

Is the instantaneous value jr of this eddy current its wave? lr III J
If r, then jr = Jr 5in (ωt - ycx/r - ψ), where ψ is a phase difference based on the impedance of the reaction plate 3. Since the magnetic flux density bg of the gap forms a moving magnetic field, the product of this magnetic flux density bO and the eddy current jr generates a continuous thrust F according to Fleming's left hand rule.

Note that this thrust is generated in either the left or right direction in Fig. 4(a), but bgxj in the left region in Fig. 4(b)
Since r is larger than the right region, the reaction plate 3 will move toward the left. Further, in order to apply a reverse propulsion force to the reaction plate 3, an alternating current of opposite phase may be caused to flow through the coils of the stator 9. As a method of varying the magnitude of this propulsive force F, methods such as varying the alternating current frequency f or varying the alternating current amplitude are adopted.

Next, the operation of the apparatus having the above configuration will be explained. - When the reaction plate 3 of the traveling body 1 receives a propulsive force from the stator 9 and the housing 2 of this traveling body 1 is guided by the guide rail 7 and travels in the traveling direction A, the reaction plate 3 receives the propulsive force from the stator 9. Guide means 10 in front of
The secondary conductor is introduced into the secondary conductor entrance portion 2OA while being guided by the secondary conductor.

In this case, adjacent rotating bodies 11A and 12 along the running path
Since an appropriate interval is set between A and the rotating bodies 11B and 12B, the running direction of the reaction plate 3 guided by the guide means 10 is 1; 1 between the stators 9 and 9.
This coincides with the direction of the izirzt travel path 20,
Therefore, the reaction plate 3 and the stators 9,9
There is no fear of contact with the wall surface of the reaction plate 3, and the reaction plate 3 can be smoothly introduced between the stators 9 and 9.

Furthermore, since the rotating bodies 11A, 11B, 12A, and 12B are non-magnetic, they are not magnetized by the magnetic flux generated in the coil of the stator 9. It does not affect the reverse propulsion force in any way.

Further, since the rotating bodies 11A, 11B, 12A, and 12B are insulators, no eddy current is generated due to the influence of the magnetic flux, and therefore no heat generation occurs due to the magnetic flux.

FIGS. 5(a) and 5(b) show another example of the guide means, and this guide means 30 includes a pair of guide members 31A.
, 31B are arranged in front of the running path 20.

The guide members 31A and 31B are made of a non-magnetic and insulating material, and there is a gap between the guide surfaces 32A and 32B of the mutually opposing guide members 31A and 31B that is slightly smaller than the thickness to of the reaction plate 3. They are arranged while forming a large interval t1.

Even if such a guide means 30 is used, it is possible to make the running direction of the reaction plate 3 coincide with the direction of the running path 20 as in the case of the guide means 10 described above, thereby preventing contact accidents, and preventing magnetic flux from being induced. There is no risk of being exposed to heat or being exposed to heat.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the invention.

For example, in the above-described embodiment, a traveling device using a linear induction motor was described, but the present invention can be similarly implemented in a traveling device using a linear DC motor or a linear pulse motor.

Furthermore, the same method can be implemented by constructing the guide member by a combination of a rotating body and a guide means having a guide surface.

[Effects of the Invention] According to the present invention described in detail above, contact between the secondary conductor and the stator is prevented by providing a guide means in front of the stator to match the running direction of the secondary conductor with the direction of the running path in the stator. A traveling device that can effectively prevent accidents can be provided.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the traveling device of the present invention;
Figure 2 is a vertical cross-sectional view of the same as above, and Figure 3 is B- in Figure 2.
B-line sectional view, Figure 4(a) is an explanatory diagram showing the operating principle of a linear induction motor, and Figure 4(b) shows the relationship between magnetic flux and eddy current of the linear induction motor shown in Figure 4(a). Characteristic diagram, FIG. 5(a) is a perspective view showing another example of the guide means,
FIG. 5(b) is a cross-sectional view of a main part showing how the reaction plate is guided by the guide means shown in FIG. 5(a). 1... Running body, 3... Reaction plate, 9... Stator, 10.30...
...Guide means, 11A, 118.12A, 12B
...Rotating body, 20 ... Running path, 2O
A...Secondary conductor entrance part, 31A, 31B...
... Guide member, 32A, 32B ... Guide surface. (G) jr (b) (b) I U Procedural Amendment January 28, 1985

Claims (4)

[Claims] (1) In a traveling device that runs or stops a traveling body having a secondary conductor using propulsive force or reverse propulsive force applied from a stator, the secondary conductor is provided in front of the secondary conductor inlet of the stator and is formed by the stator. 1. A traveling device comprising a guide means for introducing a secondary conductor between stators by aligning a traveling path of the secondary conductor with a traveling direction of the secondary conductor. (2) The traveling device according to claim 1, wherein the guide means is at least two sets of rotating bodies disposed facing each other at a distance in front of the inlet of the stator. (3) The traveling device according to claim 1, wherein the guide means is a guide member having a guide surface. (4) The traveling device according to claim 1, wherein the guide means is a combination of a rotating body and a guide member having a guide surface.