JPH03124623A - Diverging device of carrying path in carrying device - Google Patents

Abstract

PURPOSE:To reduce a gap between the lower surface of a moving body as the secondary side conductor and a progressing magnetic field generating means progressing on the primary side by forming above a branch path, a magnetic body with its flat lower surface into a shape including the carrying path in parallel with a carrying path for dividing the lower surface and providing electromagnets above the moving member. CONSTITUTION:A magnetic body such as a steel plate 9, of which lower surface is flat and in a shape including a divided carrying path, is formed over a branch path, and in parallel with the carrying path, and magnetic force generating means by electromagnets 14 is provided above the moving body 11. When the moving body 11 passes through a branch point, the moving body is floated by the magnetic force. Consequently, since a ball bearing is not necessary between the lower surface of the moving body 11 as the secondary side conductor and a progressing magnetic field generating means 4a progressing on the primary side, a gap between the lower surface of the moving body 11 as the secondary side conductor and the progressing magnetic field generating means 4a progressing on the primary side is thereby reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conveying device used in factories, warehouses, etc., and particularly to a conveying device that stably transports Ia through a conveying path having a branch portion.

[Prior Art] Conventionally, as a means for conveying wave-borne objects in product assembly and conveyance lines, etc., it has been known to load and convey objects on a conveying device whose drive source is a single-sided linear induction motor (hereinafter abbreviated as LIM). ing.

As shown in FIG. 5, at the branch point of the transport path using LIM, a branch point 54 is provided where the first transport path 51 branches into a second transport path 52 and a third transport path 53. ,3
Each of the tree transport paths 51, 52, and 53 is provided with a primary traveling magnetic field generating means for accelerating a moving object (except for the primary traveling magnetic field generating means 52a provided in the second transport path 52). (not shown), the branch point 54 is provided with bidirectional primary traveling magnetic field generating means 54a that generates traveling magnetic fields in two directions.

In addition, free roller conveyors 55 are formed on both sides of each of the three transport paths 51, 52, and 53 so that movable objects can move smoothly, and a branch point 54 is provided with a free roller conveyor 55 that can be moved in any direction. A plurality of ball bearings 56 are provided so that the movable body can move smoothly.

In the figure, 57 is a moving body that moves on the conveyance path,
Reference numeral 58 denotes rows of rollers arranged on both sides of each conveyance path to restrict the movement of the movable body from side to side while moving on the conveyance path.

[Problems to be Solved by the Invention] In the branching device using the conventional LIM described above, at the branching point, as shown in FIG. Bearings are installed,
Therefore, the distance between the primary traveling magnetic field generating means and the lower surface of the moving body forming the secondary conductor becomes large. In other words, the distance between the primary traveling magnetic field generating means and the lower surface of the moving body forming the secondary conductor in a normal straight conveyance path is 2.
3 ms, but at the branch point it is 20 to 30 m, and the efficiency of LIM is extremely reduced.

In addition, since multiple ball bearings support the lower surface of the moving body forming the secondary conductor, and the secondary conductor is usually made of aluminum, the aluminum surface may be scratched or There was a problem that it was easy to wear out.

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, it is an object of the present invention to provide a branching device for a conveyance path that can prevent the secondary conductor from being worn out and smoothly pass a branch point.

[Means for Solving the Problems] In order to solve the above problems, in a transport path branching device in a transport device based on the present invention, a transport path and a movable body supported movably along the transport path are provided. A primary side traveling magnetic field generating means and a secondary side conductor are provided in each, and the movable body can be moved in the conveying direction of each conveying path at a branch point formed by a plurality of conveying paths having mutually different directions. A branching device for a conveying path in a conveying device comprising means for generating a primary side traveling magnetic field that has a shape including a conveying path whose lower surface branches off at the upper part of the branching path, and A magnetic body is formed in parallel with the movable body, and an electromagnet is provided above the movable body. In addition, a primary traveling magnetic field generating means and a secondary conductor are provided on the conveyance path and the movable body movably supported along the conveyance path, so that a plurality of conveyance paths having mutually different directions are formed. In a conveyance path branching device in a conveyance device, the conveyance path branching device is provided with a means for generating a primary side traveling magnetic field that enables movement of a movable body in the conveyance direction of each conveyance path at a branch point. The shape includes a conveyance path branching from the lower surface at the upper part of the conveyance path, and an electromagnet is provided parallel to the conveyance path.

Further, the magnetic body is formed of a steel plate, and the electromagnet is energized just before the movable body enters the branch point, and de-energized after passing the branch point.

[Function] According to the present invention, the upper part of the branching path is formed of a magnetic material such as a steel plate so that the lower surface is flat and the shape includes the branching conveyance path, and a magnetic force generating means using an electromagnet is provided in the upper part of the moving body.
Further, the magnetic force generating means provided on the upper part of the moving body is energized just before the moving body enters the branch point, and de-energized after passing the branch point, so that the moving body passes the branch point. In some cases, the floating body can be levitated by the magnetic force, and a ball bearing is not required between the lower surface of the moving body, which is the secondary conductor, and the primary traveling magnetic field generating means. It is also impossible to reduce the distance from the primary traveling magnetic field generating means.

[Example] An example of the present invention will be described in detail with reference to the attached FIGS. 1 to 4. FIG. 1 is a top view of a branching point of a conveyance path through which a moving body carrying objects to be transported passes, and FIG. FIG. 3 is a perspective view of one embodiment, and FIG. 3 is a front sectional view of a conveyance path branching point portion of one embodiment based on the present invention.

An example of a bidirectional primary traveling magnetic field generating device, which is an embodiment of the primary traveling magnetic field generating means provided at the transport path branch point, is shown in the fourth (21).

The same reference numerals in each figure indicate the same parts.

FIG. 1 shows a transport path branching point 4 where the first transport path 1 branches into a second transport path 2 and a third transport path 3. As shown in FIG.

Each of the three transport paths 1.2.3 is provided with a primary traveling magnetic field generating means 1a, 2a, 3a for accelerating a moving body, and the transport path branch point 4 is provided with A bidirectional primary traveling magnetic field generating means 4a, the details of which will be described later, is provided to generate a traveling magnetic field.

Furthermore, rollers 5 are arranged in regular rows on the upper surfaces of both sides of each of the plurality of conveyance paths, and when the movable body passes through the conveyance path, the rollers support the weight of the movable body and reduce running resistance. It forms a free roller conveyor for

Further, although not shown in the figure, a plurality of rollers are disposed laterally on both sides of each of the plurality of transport paths to prevent the movable body from swinging laterally when traveling.

As shown in FIG. 2, above the transport path branch point 4 described above, there is an ill plate 9 made of a magnetic material whose lower surface is molded smoothly and separated by a distance 51 suitable for the moving body described above to pass through. It is arranged parallel to the conveyance path.

That is, in FIG. 2, reference numeral 9 is provided at the upper part of the transport path branching point, with one part covering the upper part of each transport path 1.2.3 of the three trees, with a smooth lower surface and each This is a steel plate placed parallel to the conveyance path.

FIG. 3 shows a cross section of the transport path 1 and the moving body seen from the front at the introduction point from the transport path 1 to the transport path branch point 4.

In FIG. 3, 1a is the primary side traveling magnetic field generating means provided in the conveyance path 1 mentioned above, and 5 is the free roller conveyor mentioned above for supporting the weight of the moving body and lowering the running resistance. It is a roller that forms.

At the branch point, a bidirectional primary traveling magnetic field generating device is provided as the above-mentioned primary traveling magnetic field generating means, and no roller conveyor is provided.

Reference numeral 9 denotes a steel plate parallel to the conveyance path described above in FIG.

Reference numeral 10 denotes a moving body which is a carrier for storing and transporting an object which is the main body of the moving body, and 11 is a secondary conductor formed by an aluminum plate bonded to the bottom of the moving body 10. .

12 is a magnetic sensor that detects the presence of the steel plate 9;
Reference numeral 4 denotes an electromagnet, and a control device 13 operates in accordance with a signal from a sensor 12 to excite an excitation circuit of the electromagnet 14.

Next, the present invention in the above configuration will be explained in detail.

When the moving body 10 is driven on the first conveyance path 1 in the direction of the conveyance path branching point 4 by the primary traveling magnetic field generating means 1a, a moving body provided on the ground (not shown in the figure) The detection sensor notifies the transport control device, also not shown, that the moving object has approached the branch point.

If the transport control device installed on the ground has been inputted in advance so that the moving object will proceed to the third transport path instead of the second transport path, the transport controller that has received the arrival signal of the moving object The control device controls the traveling magnetic field generated by the primary traveling magnetic field generating means 1a to reduce the speed of the moving body to a speed at which the moving body can diverge at the branch point by the horizontal traveling magnetic field described below. .

The moving body travels on the first conveyance path 1 through the primary side magnetic field generating means 1
When the moving body approaches the conveyance path branch point 4 at the speed indicated by a and the magnetic sensor 12 provided on the moving body detects the steel plate 9, a detection signal is sent to the control device 13. The control device 13 causes an exciting current to flow through the electromagnet 14 based on the input of the signal.

The attractive force of the electromagnet 14 and the height of the steel plate 9 are set so that the moving object is levitated but the electromagnet 14 and the steel plate 9 do not come into direct contact.

Therefore, when the electromagnet 14 is excited, the moving body will float in space without being held by the rollers below.

When the levitated moving object further advances and reaches the upper part of the bidirectional primary traveling magnetic field generating means 4a provided at the branch point 4, the moving object sensor provided at the transport path branch point (not shown in the figure)
The arrival of the mobile object at the branch point 4 is notified to a transport control device provided on the ground, which is also not shown in the figure.

If the transport control device installed on the ground has been inputted in advance so that the mobile object will proceed to the third transport path instead of the second transport path, 11? The transport control device f outputs an excitation output to the two-direction primary side traveling magnetic field generating means 4a so as to generate a traveling magnetic field in the lateral direction.

As described above, the movable body receiving the horizontal traveling magnetic field has no running resistance because it is floating in the air. Although the paper slides sideways in the direction of the conveyance path, it is prevented from deviating from the conveyance path by the guide rollers (not shown).

Therefore, the moving body moves in the direction of the third conveyance path, which is the movement target.

Further, the transport control device excites the primary traveling magnetic field generating means 3a of the third transport path 3 to form a traveling magnetic field in the third transport path 3.

When the moving body advances further and leaves the area of the branch point, the detection signal from the above-mentioned moving body sensor disappears. The output of excitation output to the traveling magnetic field generating means 4a is stopped.

Further, when the moving body advances further and comes off the steel plate 9, the detection output of the steel plate sensor 12 provided on the moving body disappears, so the control device 13 stops the excitation output to the electromagnet 14.

Since the movable body that has come off the steel plate 9 has no floating blade, it is rolled by the roller group 5 forming the free roller conveyor and moves forward.

Further, since the sensor 12 provided on the moving object no longer detects the steel plate 9, the control device 13 stops the excitation current to the electromagnet 14 based on the input signal from the sensor 12.

Next, the bidirectional traveling magnetic field generating device 4a provided at the transport path branch point 4 will be explained with reference to FIG.

As shown in FIG. 4, the two-direction primary traveling magnetic field generator includes an upper primary core 41 and a lower primary core 42 that form a lattice-shaped slot, and a magnetic field traveling in the X-axis direction that is disposed within the slot. It is composed of an X-direction winding 43 that generates a traveling magnetic field, and a Y-direction winding 44 that generates a traveling magnetic field in the Y-axis direction.

In this case, the X-direction winding 43 and the Y-direction winding 44 are arranged to be perpendicular to each other within the slot, and the X-direction winding 43 is arranged in the upper layer and the Y-axis winding is arranged in the lower layer in the slot. In addition, the upper primary side iron core 41 and the lower primary winding 4
2 are both constructed by laminating electrical iron plates, the stacking direction of the upper primary iron core 41 is parallel to the X axis, and the lamination direction of the lower primary iron core 4
The direction of 2 is parallel to the Y axis.

In such a configuration, when the moving body is located above the two-way primary side traveling magnetic field generator, when three-phase alternating current is supplied to the X-direction winding 43, the secondary side attached to the bottom surface of the moving body A thrust is applied to the conductor in the X direction, thereby urging the movable body in the X direction so that the movable body moves in the X direction.

Furthermore, when three-phase alternating current is supplied to the Y-direction winding 44, thrust is applied in the Y-direction to the secondary conductor attached to the bottom surface of the hyperactive body, thereby urging the movable body in the Y-direction. The moving object moves in the Y direction.

Note that when it is necessary to control the speed of a moving object, a traveling magnetic field is created by controlling the phase of an alternating current flowing through each of a plurality of windings connected to the primary iron core, and the traveling magnetic field is It is possible to control the advancing speed of the secondary conductor by arbitrarily controlling the advancing speed of the secondary conductor.

Therefore, by appropriately controlling the traveling speed of the traveling magnetic field in two directions at the branching angle of the conveyance path branching point and at the curved portion required for the lick of the branching, the running resistance at the branching point can be extremely reduced by the present invention. This allows for smooth branching.

In the above explanation, it was explained that a traveling magnetic field generating device in two directions is used as the traveling magnetic field generating means provided at the branching point of the conveying path, but the acceleration by the primary traveling magnetic field generating means before the branching point of the conveying path is not properly performed. If so, a unidirectional traveling magnetic field generation means only in the lateral direction may be used. In this case as well, the present invention makes running resistance at the branching point extremely small, so that smooth branching can be achieved.

In addition, in the above explanation, it was explained that the moving speed is reduced before the moving object reaches the branching point of the conveyance path, but of course there is no need to reduce the speed when the moving object does not branch. Depending on the performance of the magnetic field generating means, it is not necessarily necessary to reduce the speed.

Moreover, the three conveyance paths explained in the embodiments may be straight lines or suitably curved without any problem in implementing the present invention.

Further, the shape of the steel plate provided above the transport path branch point can be appropriately determined in accordance with the branching angle of the transport path branch point, the curve before and after the branch point, the speed of the moving body, and the like. Further, the material does not necessarily have to be a steel plate as long as it is a magnetic material that can levitate the moving body by magnetic force.

In addition, in this embodiment, an electromagnet and a magnetic sensor are provided on the moving object in order to provide a means of levitation for the moving object, but the electromagnet may also be provided on the ground equipment. Alternatively, the electromagnet may be excited by a signal from a moving object sensor provided on the conveyance path.

In the above description, the operation of the present invention in the case where the first conveyance path 1 branches into the third conveyance path 3 has been explained. When entering the second conveyance path 2 from the second conveyance path 2, the second conveyance path 2
Predetermined operations can be performed in the same manner as described above when entering the conveyance path 1 and when entering the first conveyance path 1 from the third conveyance path 3. Also, when entering the third transport path 3 from the second transport path 2, and when entering the second transport path 2 from the third transport path 3,
Even when entering the transport path, predetermined operations can be performed in the same manner as described above by controlling the traveling magnetic field generating means provided at the branch points and the respective transport paths.

[Effects of the Invention] As explained above, according to the present invention, the upper part of the branch path is formed with a magnetic material such as a steel plate in a shape that has a flat bottom surface and includes a branching conveyance path, and a magnetic force generated by an electromagnet is applied to the upper part of the moving body. Further, the magnetic force generating means provided on the upper part of the moving body is energized just before the moving body enters the branch point, and is de-energized after passing the branch point, so that the magnetic force generating means provided on the upper part of the moving body When passing through a branch point, the magnetic force allows it to levitate, so the lower surface of the moving body, which is a secondary conductor, and the first
Since a ball bearing is not required between the secondary traveling magnetic field generating means, the distance between the lower surface of the movable body, which is a secondary conductor, and the primary traveling magnetic field generating means can also be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, viewed from above, at a branching point in a conveyance path through which a moving body carrying objects to be conveyed passes. FIG. 2 is an enlarged perspective view of a conveyance path branching point portion along which the movable body moves in the embodiment shown in FIG. FIG. 3 is a front cross-sectional view of a conveyance path branching point according to an embodiment of the present invention. FIG. 4 is a perspective view showing one embodiment of a traveling magnetic field generating device provided at a branch point. FIG. 5 is a perspective view of a conventional conveyance path branch point. 1...First conveyance path, 2...Second conveyance path, 3...Third conveyance path, la...First conveyance path primary Lateral traveling magnetic field generating means, 2a
...Second conveyance path primary side traveling magnetic field generating means, 3a...
・Third conveyance path primary side traveling magnetic field generating means, 4...
・Conveyance path branch point, 4a... Conveyance path branch point primary side traveling magnetic field generator, 9・
... Steel plate, 11 ... Secondary conductor, 12 ... Sensor, 14 ... Electromagnet.

Claims (1)

[Claims] 1. A conveyance path and a moving body movably supported along this conveyance path are provided with a primary traveling magnetic field generating means and a secondary conductor, respectively, and the directions are different from each other. A branching of a conveyance path in a conveyance device comprising means for generating a primary traveling magnetic field that enables movement of a movable object in the conveyance direction of each conveyance path at a branch point formed by a plurality of conveyance paths. In the apparatus, the shape includes a conveyance path whose lower surface branches at the upper part of the branch path,
A branching device for a conveyance path in a conveyance device, characterized in that a magnetic body is formed parallel to the conveyance path, and an electromagnet is provided above the moving body. 2. A primary traveling magnetic field generating means and a secondary conductor are provided on a conveyance path and a movable body movably supported along this conveyance path, so that a plurality of conveyance paths having mutually different directions are formed. A branching device for a conveying path in a conveying device comprising means for generating a primary traveling magnetic field that enables movement of a movable body in the conveying direction of each conveying path at a branch point, wherein the branching path It has a shape that includes a conveyance path that branches off from the bottom at the top.
A branching device for a conveyance path in a conveyance device, characterized in that an electromagnet is provided parallel to the conveyance path. 3. A branching device for a conveyance path in a conveyance apparatus according to claim 1 or 2, wherein the magnetic body is molded from a steel plate. 4. The electromagnet is energized immediately before the movable body enters a branch point, and is deenergized after passing the branch point. Branching device.