JPS61177102A - Traveling vehicle - Google Patents

Abstract

PURPOSE:To effectively prevent a secondary conductor from contacting with a stator as a defect by providing guide means for narrowing an interval of guide rails in a range provided with a stator and guiding the projections of the conductor. 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. Wheels 5 of members to be guided are disposed at both sides of a casing for the traveling direction of the truck 1, and the railway of the truck 1 is formed by opposing guide rails 7, 7 in such a manner that the open ends of U-shape are opposed inward. The spacing distance between the inside surfaces of the rails 7, 7 is formed narrowly in a range that the stator 9 is existed. The projection 3A of the plate 3 is guided along the railway by a rotor 11 of guide means 10.

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 its Problems 1] A linear induction motor is an example of a device that causes a traveling object to travel using the propulsive force or reverse propulsive force produced by a thrust imparting means. In a conveyance system using a linear induction motor, a reaction plate, which is a secondary conductor, is provided on a traveling body, and a stator, which is a thrust imparting means, is arranged at a predetermined interval on a traveling 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 even the linear induction motor would not operate normally.

Therefore, in particular, a method in which two stators are arranged with a predetermined gap and a secondary conductor moves through the gap between the stators (
With double-sided linear motors, the problem is how to introduce the secondary conductor between the stators and how to guide the secondary conductor between the stators.

Conventionally, as a guide means for a secondary conductor, for example,
There is one that is equipped with two sets of []-ra 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 facing surfaces of both the stator, and the secondary conductor enters the stator at the secondary conductor entrance part. The secondary conductor is introduced at a certain angle, and as a result, the secondary conductor comes into contact with the stator wall, causing damage and abnormal operation of the linear induction motor. This is noticeable in devices that are long and aim to obtain large propulsive force.

[Purpose of the Invention J The present invention has been made in view of the above circumstances, and is intended to prevent the contact of the secondary conductor even when the protruding length of the secondary conductor is large and a large propulsion force is obtained to transport a considerably heavy object. The object of the present invention is to provide a traveling device that can reliably prevent accidents.

[Summary of the Invention] The outline of the present invention for achieving the above object is as follows: a running body having a secondary conductor; a guide rail that is provided at a predetermined interval to support the running body; and a propulsive force applied to the secondary conductor. Alternatively, in a traveling device provided with a stator that travels or stops by applying a reverse propulsion force, the guide rails are formed with narrow intervals in a region where the stator is provided, and the two guide rails protrude outward from the stator. By providing a guide means for guiding the protrusion of the secondary conductor,
It is characterized by reliably preventing contact accidents between the secondary conductor and the stator.

[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 a running body and a guide rail that forms the track of this running body, Fig. 2 (a) is a vertical cross-sectional view of the running body, guide rail, and stator, and Fig. 12 (b) is a schematic perspective view of a running body and a guide rail forming the track of this running body.
Fig. 3 is a cross-sectional view taken along the line 8-[3 of Fig.
) and (b) are explanatory diagrams of the operating principle of a linear induction motor.

In FIGS. 1 and 2, a traveling body 1 is loaded with articles i'i
A reactor insulating plate 3 with a secondary conductor is installed at the lower end of the flexible housing 2. 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.

The housing 2 is provided with a guided member whose travel is guided by a guide rail 7.7, which will be described later. The guided it and tJ are provided with two wheels 4 each, which are rotating bodies that protrude laterally from the width of the housing 2, on the leading end side and the rear end side of the traveling body 1 in the traveling direction. Total 4
It is constructed by arranging the Stator 9,9
A guide means 10 is provided on the lower surface of. This guide means 10 is made of a magnetic and insulating material (for example, plastic, rubber, etc.) that guides the protrusion 3A of the reaction plate 3 that protrudes downward through the space between the stators 9, 9.
It is constructed by rotatably attaching a rotating body 11°11 formed by the above to the bottom surface of the stator 9.9.

The N rolling bodies 11.11 are set such that the distance between their outer circumferences [1] is slightly larger than the thickness to of the reaction plate 3, and for example, six pairs are arranged oppositely along the running path of the reaction plate 3. ing.

Furthermore, on both sides of the housing 2 in the traveling direction of the traveling body 1, a total of eight wheels 5, which are guided members, are arranged, two on one side and two on the upper and lower sides. The running path 6 of the running body 1 is
It is formed by arranging guide rails 7.7 each having a cross-sectional shape and facing each other with the open end of the shape facing inward. The distance between the inner surfaces 7a and 7c of the guide rails 7.7 is determined by the distance between the inner surfaces 7a and 7c of the running body 1 formed by the wheels 4, 4, as shown in FIG. The spacing distance a1 is slightly larger than the length b in the width direction, and the spacing distance a2 is further slightly larger than the front spacing distance 11at in the region where the stator 9 is not present. That is, the relationship is b<al<a2. Further, the opening-shaped opposing surface 7b of the guide rail 7,
The separation distance C formed by 7c is the distance between the
It is slightly longer than the distance d from the upper end to the lower end of the i-wheel 5.5. Note that the inner surface 7a and the opposing surface 7b.

7C is a guide 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 is arranged in the housing 2
It consists of a reaction plate 3 as a movable element attached to the reactor plate 3, and a pair of stators 9.9 as stators disposed opposite to each other with the travel path of the reaction plate 3 interposed therebetween.

As shown in FIG. 2(b), the stators 9, 9 are made by laminating electric iron plates with teeth and grooves punched out therein, and coils are wound around the eight grooves. In addition, reaction plate 3
A gap of a certain distance g is provided between the stator 9 and the stator 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 coils of the stator 9, the instantaneous value ba of the magnetic flux density at the gap is calculated as JI=B!J cos(ωt −πχ /τ) Here,
ω=2π”:′1fllli angular frequency (rad/s
) f: Frequency (llz) (: Time (s) χ: Distance on the Nischi surface (Im) τ: Ball 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, it generates an eddy current in the reaction plate 3, which is a mover, according to Lenz's law.
) The O mark and the X mark shown on the cross section of the axicon plate 3 shown in the figure represent the direction in which the eddy current flows and its magnitude.

If the instantaneous value jr of this eddy current is its peak value Jr, then jr = Jr 5in (ωt -7rχ/r-ψ) where ψ is the phase difference based on the impedance of the reaction plate 3. The magnetic flux density bg of the gap , which forms a moving magnetic field, the product of this magnetic flux density bg and eddy current jr generates a continuous thrust according to Fleming's left-hand rule.

Note that this thrust E occurs in either the left or right direction in Figure 4 (a), but bgx in the left region in Figure 4 (b)
Since jr is larger than the right area, reaction plate 3
will move to the left.

Furthermore, in order to give 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 for varying the magnitude of this thrust 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 the traveling body 1 is guided by the guide rail 7 and travels in the traveling direction Δ, each side of the traveling body 1 The wheels 4 are on the opposing surface 7b of the guide rail 7.7.
, 7c, travels in the traveling direction A.

At this time, since the separation distance 111at in the region where the stators 9, 9 are present is smaller than the separation distance a2 in the other region where the stators 9, 9 are not present, the housing 2 of the traveling body 1 is
, 9, the stator 9.9 is guided under stricter restrictions in the lateral direction than when passing through an area where the stator 9.9 does not exist.

At this time, the protrusion 3A of the reaction plate 3
Since the traveling body 1 is guided along its travel path by the rotating body 11 of the guide means 10, the traveling body 1 is guided by both the side surface of the housing 2 and the protrusion 3A of the reaction plate 3. As a result, the reaction Contact between the plate 3 and the stator 9.9 can be reliably prevented.

Further, each of the wheels 4 is originally used for moving the housing 2, and the guide of the reaction plate 3 by the rotating body 11. 3A, the impact force applied to the rotating body 11.11 is relatively small, and therefore the guide means 10 can be constructed at low cost, and even when the reaction plate 3 has a large protruding length and its propulsive force is large. can be guided with certainty. Note that since the rotating bodies 11, 11 are made of non-magnetic and insulating materials, there is no risk of them becoming magnetized or generating heat due to the influence of magnetic flux from the stators 9, 9.

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.

Further, the number of rotors 11, 11 of the guide means 10 arranged in a row can be arbitrarily set depending on the lengths of the stators 9, 9 in the running direction A.

Furthermore, instead of the rotating body 11.11 described above, a guide member having a running groove along the running path and made of a non-magnetic and insulating material can also be used.

[Effects of the Invention] According to the present invention described in detail above, a guide means is provided for guiding the protrusion of the secondary conductor protruding outward from between the stators, and By making regulations more stringent than in other areas,
It is possible to provide a traveling device that can reliably prevent contact with the stator even in the case of a secondary conductor that has a large protrusion length and receives a large propulsive force.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the traveling device of the present invention;
Figure 2 <a> is a longitudinal cross-sectional view of the same as above, Figure 2 (b) is a cross-sectional view taken along the line B-B in Figure 2 (a), and Figure 3 shows the state of the traveling body running on the guide rail. Cross section, 4th
FIG. 4(a) is an explanatory diagram showing the operating principle of the linear induction motor, and FIG. 4(b) is a characteristic diagram showing the relationship between magnetic flux and eddy current of the linear induction motor shown in FIG. 4(a). I1+.・′、；、・J″), Figure 2 CG) j″ (b) Procedural amendment January 28, 1985

Claims (1)

[Claims] A running body provided with a running body having a secondary conductor, a guide rail that is provided at a predetermined interval to support the running body, and a stator that applies a propulsive force or a reverse propulsive force to the secondary conductor to cause it to run or stop. In the device, the guide rails are formed with narrow intervals in a region where the stator is provided, and are provided with guide means for guiding a protrusion of the secondary conductor that protrudes outward from the stator. Traveling device.