JP2001204108A - Cargo transporting facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cargo transporting facility capable of protecting a permanent magnet for branching and converging at the time of branching and converging travels and preventing the reduction of thrust toward a moving object. SOLUTION: A cargo transporting facility comprises a self-propelled car that is provided with the primary coils of a linear motor to which a current is supplied, tracks C1, C2 for the car, and magnetic pole pieces 44, 44A, 44B of N pole and S pole arranged alternately facing the coils along the tracks C1, C2. In this facility, a protective plate 51 for covering the magnetic pole pieces 44A, 44B is arranged on the passage on which the traveling wheels of the self-propelled car crosses the branching and converging part E of the tracks C1, C2. Also, the magnetic pole pieces 44A, 44B are stacked in two layers. This structure can prevent damage to the magnetic pole pieces 44A, 44B caused by the weight of the self-propelled car at the time of branching or converging travel. Furthermore, by stacking them in two layers, their magnetic field intensifies and the loss of the magnetic field by the protective plate 51 can be compensated. As a result, the thrust to the moving object can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load transporting facility provided with a moving body for transferring a load by moving on a fixed moving path by obtaining a thrust by a linear motor.

[0002]

2. Description of the Related Art An example of the above-mentioned load transport equipment is disclosed in Japanese Unexamined Patent Publication No.
It is disclosed in 168805. The load transporting equipment includes a transport vehicle provided with a coil to which an electric current is supplied, and a traveling track on which the transport vehicle travels and in which a plurality of permanent magnets are provided so as to face the coil in a direction in which the transport vehicle extends. The traveling track has a branch portion that branches in two or more directions, the branch portion is provided with a plurality of branch portion permanent magnets, the branch portion permanent magnet, They are arranged and arranged so as to straddle between one traveling track and two traveling tracks.

[0003]

However, in the above-described conventional configuration, the branching section is arranged and arranged so as to straddle between one traveling track and two traveling tracks at which the branching section permanent magnet branches. Therefore, every time the transport vehicle branches and travels, the traveling wheel of the transport vehicle passes through the same location of the branch portion permanent magnet, and every time the transport vehicle passes, the weight of the transport vehicle passes through the same location of the branch portion permanent magnet. Therefore, there is a possibility that the permanent magnet for a branch portion is broken or cracked.

[0004] Accordingly, the present invention provides a method for branching and merging.
It is an object of the present invention to provide a load transporting facility that can protect a permanent magnet for a branching / merging section and avoid a reduction in thrust to a moving body.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a coil for supplying a current to a moving body is provided, and a coil is provided along a trajectory of the moving body. The magnetic pole pieces of the N pole and the S pole are alternately arranged in opposition to the coil, and by feeding power to the coil of the moving body, the moving body obtains a thrust and moves, so that the load is transported by a load transporting facility. At the branch or junction of the track, at least in the passage portion where the wheels of the moving body traverse the branch or junction, a protective material that covers the pole piece is disposed. is there.

According to the above structure, even if the wheel of the moving body passes over the magnetic pole piece of the branching or merging portion when the moving body branches or merges, the moving body has a wheel portion on the passage magnetic pole piece. Is protected by the protective material, thereby preventing the pole piece from being damaged by the weight of the moving body.

[0007] The invention according to claim 2 provides the above-described claim 1.
The described invention is characterized in that the pole pieces of the N pole and the S pole are double-laminated and arranged at the branching portion or the merging portion of the track.

According to the above construction, the magnetic pole piece is strengthened by laminating the N pole and the S pole pole pieces in a double layer,
The loss of the magnetic field due to the protective material is compensated, and the thrust of the moving body is maintained.

[0009] The invention according to claim 3 provides the above-mentioned claim 1.
Or the invention according to claim 2, wherein, at a branch portion of the track, N-pole and S-pole magnetic pole pieces whose widths are sequentially widened from a predetermined ratio of the track width are arranged on a straight track, and N and S pole pieces whose widths are sequentially increased from the remaining ratio of a predetermined ratio of the straight line trajectory along the inner circumference of the branch trajectory. Are arranged so as to fill the track width of the pole piece of the linear track.

According to the above configuration, the gap between the pole pieces arranged on the straight track and the branch track is minimized, and a constant thrust can always be obtained. The invention according to claim 4 is the invention according to claim 1 or claim 2, wherein, at the merging portion of the orbits, an N-pole and an S-pole whose widths are sequentially reduced from a track width to a straight track. The magnetic pole pieces of the N and S poles whose widths are sequentially reduced from the track width along the inner circumference of the merged orbit are arranged on the merging orbit that merges with the straight orbit. It is characterized in that it is arranged so as to fill the track width of one piece.

[0011] According to the above configuration, the gap between the pole pieces arranged on the straight track and the merging track is minimized, and a constant thrust can always be obtained.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a load transport facility in the present embodiment, FIG. 2 is a side view of a self-propelled vehicle of the transport facility, and FIG. 3 is a partial cross-sectional front view of the transport facility.

The load transporting equipment includes a plurality of self-propelled vehicles (an example of a moving body) V and a moving orbit (transport route) C1,
The self-propelled vehicle V is guided by the rail device B and moves. Trajectory C
Numeral 1 indicates a straight path (straight path), and a moving path C2 indicates a branching / merging path (an example of a branching path or a merging path) branched off and merged from the linear path C1. The part branched and joined from the straight track C1 is referred to as a branched / joined part E (an example of a branched part and a joined part).

The vehicle V and the rail device B will be described in detail. [Autonomous Vehicle] The self-propelled vehicle V includes a self-propelled vehicle body 1 and a front-rear direction (a traveling direction of the self-propelled vehicle V) which is erected at the center of the self-propelled vehicle body 1.
It comprises a carrier 3 supported by two supports 2 and on which a load D to be transported is placed.

At the center of the lower surface of the carrier 3, a pickup coil 5 is provided, in which an electromotive force is induced by a magnetic flux generated by an induction line described later. The pickup coil 5 is formed by winding a cable made of litz wire having 10 to 20 turns around a core made of ferrite having a cross section of an E-shape (which may be an I-shape or a T-shape).

The traveling vehicle body 1 is mounted as a traveling means so as to be freely rotatable via an axle, and has four traveling wheels 11, which are fore and aft, left and right, which support the traveling vehicle V, and play through the axle. Power is supplied from a total of four wheels 12 for lateral movement, which are rotatably mounted on the front and rear, right and left, a stator (primary coil) 13 of the linear motor, and the pickup coil 5 to supply a primary current to the primary coil 13 of the linear motor. A linear motor driver 14 is provided.

The self-propelled vehicle body 1 has a seesaw 22 which is disposed at the front and rear and is provided with transfer wheels 21 at left and right ends, respectively, as means for selecting a traveling route.
And a support 23 rotatably supporting a central support shaft of the seesaw 22, and connected to the support shaft of the seesaw 22, further supplied with power from the pickup coil 5, and rotating the support shaft to switch between left and right. A drive unit 24 including a motor for moving the position of the wheel 21 up and down, and a seesaw 22
A shaft 25 is provided for connecting the central support shaft.

The self-propelled vehicle body 1 has a roller 26 which rotates by contact with a first traveling guide surface 41 of a traveling rail 31 which will be described later by movement of the self-propelled vehicle body 1, and a rotating shaft of the roller 26. And a controller (not shown) for judging traveling / stopping or a traveling route while checking a traveling position by counting a pulse signal output from the encoder 27. The controller outputs a traveling command to the driver 14 of the linear motor during traveling, and drives the driving unit 24 when changing the traveling route. The linear motor driver 14 supplies a primary current to the primary coil 13 of the linear motor in accordance with a traveling command from the controller. [Rail device] The rail device B is shaped to cover the self-propelled vehicle body 1 so that the dust generated when the self-propelled vehicle body 1 of the self-propelled vehicle V travels does not diffuse outside. A pair of left and right traveling rails 31 and the left and right traveling rails
Left and right side wall panels 32 fixed to the
(Including the support 2) and a pair of left and right upper panels 33 that can pass through. The pair of right and left running rails 31 are connected at their lower ends.

The traveling rail 31 has a first traveling guide surface 41 which contacts the traveling wheel 11 from below, and has left and right side wall panels.
32 has a second traveling guide surface 42 that contacts the lateral movement regulating wheel 12 from outside, and further inside the traveling rail 31,
The first traveling guide surface facing the primary coil 13 of the linear motor
At approximately the same level as 41, rectangular N-pole and S-pole magnetic pole pieces (permanent magnets) 44 are repeatedly arranged in the traveling direction of the vehicle V.

A pair of guide rails 45 having running guide surfaces respectively contacting the left and right transfer wheels 21 are provided on the inner side surfaces of the left and right side wall panels 32, respectively. A guide line 47 is laid at the opposite end supported by a hanger 46 protruding from the end. [Branch / Merge Section of Rail Device] The arrangement of the magnetic pole pieces 44 at the branch / merge portion E of the rail device B is shown in FIGS.

In the branching / merging portion E of the rail device B, in the branching direction, the straight track C1 is formed on the straight track C1 by a half (predetermined length) of the track width (length in the left-right direction perpendicular to the running direction of the vehicle 1). The N-pole and S-pole magnetic pole pieces 44A of which the track widths are made longer (wider) in order from the width of the magnetic pole piece 44A are alternately arranged, and the branch-and-merge trajectory C2 is divided into the branch-and-merge trajectory C2. Along the circumference, a pole piece 44B having a track width that fills the track width of the pole piece 44A of the linear track C1 from a width of 軌道 of the track width L (an example of the remaining ratio) is arranged. The pole piece 44B has a substantially trapezoidal shape. Further, the pole pieces 44, 44 forming the branching / merging portion E
A and 44B are obtained by laminating the pole pieces 44 of another linear track C1 in a double layer.

By the structure of the branching / merging portion E, in the merging direction, N-pole and S-pole magnetic pole pieces 44A whose widths are narrowed in order from the orbital width are arranged on the linear trajectory C1. Then, the N-pole and S-pole magnetic pole pieces 44B whose widths are reduced in order from the track width of the branching / merging track C2 are arranged so as to fill the track width of the magnetic pole piece 44A of the linear track C1.

On the branching / merging portion E, there are magnetic pole pieces 44,44.
A protection plate (an example of a protection material) 51 that covers the A and 44B and allows the magnetic field of the pole pieces 44, 44A and 44B to pass therethrough is attached. The operation of the above configuration will be described.

First, when power is supplied to the guide line 47, the magnetic flux generated by the left and right guide lines 47 located in the two concave portions (side portions) of the pickup coil 5 generates
An electromotive force is induced in the pickup coil 5 of the vehicle V.
The alternating current generated by the electromotive force is rectified, regulated to a predetermined voltage, and supplied to the controller, the linear motor driver 14, and the driving unit 24. When a driving command is output from the controller to the linear motor driver 14, the linear motor driver 14 supplies a primary current to the primary coil 13 of the linear motor in accordance with the driving command of the controller, and the coil 13 is formed. The interaction between the magnetic field generated and the magnetic field formed by the magnetic pole pieces 44 of the N and S poles arranged alternately generates a repulsive force and an attractive force, which are converted as thrusts, and the vehicle V moves on the traveling rail 31. It is guided and moves.

When changing the movement trajectory, the controller instructs the drive unit 24 to move the see-saw so that the transfer wheel 21 comes into contact with the guide rail 45 on the selected movement path.
Drive 22. And when it reaches the branching / merging section E,
Guide rail 45 on the moving track side selected by the transfer wheel 21
The travel route is changed by being guided.

At this time, the traveling wheels 11 of the self-propelled vehicle V located on the outer peripheral side of the branching / merging portion E move on the protection plate 51 from the first traveling guide surface 41 of the traveling rail 31, and
While supporting the weight of the self-propelled vehicle V by 51, the branch track C2
To the first travel guide surface 41 of the vehicle. Therefore, it is possible to prevent the magnetic pole pieces 44, 44A, 44B forming the branching / merging portion E from breaking or cracking due to the weight of the vehicle V. In the branching / merging section E, the pole piece 4
Since the magnetic pole pieces 44, 44A, 44B are strengthened by the double lamination of 4, 44A, 44B, even if the magnetic field of the magnetic pole pieces 44, 44A, 44B is weakened by the protection plate 51, , Enough thrust can be given to the self-propelled vehicle V.

As described above, it is possible to prevent the magnetic pole pieces 44, 44A, 44B of the branch / merge portion E from being damaged without impairing the thrust of the vehicle V. Also, the pole pieces 44A, 44 of the branching / merging portion E
Due to the shape and arrangement of B, the location where the pole piece breaks can be minimized, an optimal magnetic field can always be generated, and the same thrust can be generated.

In the present embodiment, the branching / merging section E
In FIG. 6, the entire pole pieces 44, 44A and 44B are covered by a protection plate (an example of a protection material) 51. As shown in FIG. A protection plate (an example of a protection material) 52 that covers the pole pieces 44, 44A, 44B may be arranged only in the passage section that crosses the gap. The protection plate 52 allows the pole pieces 44, 44A,
44B can be prevented from cracking or cracking due to the weight of the vehicle V.

[0029]

As described above, according to the present invention, even if the wheel of the moving body passes over the magnetic pole piece at the branching or merging point when the moving body branches or merges, the moving body does not move. Since the pole piece on the passage portion of the wheel is covered with the protective material, it is possible to prevent the pole piece from being damaged by the weight of the moving body.

[Brief description of the drawings]

FIG. 1 is a partial plan view of a load transport facility according to an embodiment of the present invention.

FIG. 2 is a side view of a self-propelled vehicle of a load transfer facility provided with the load transfer facility.

FIG. 3 is a partial cross-sectional front view of a load transfer facility provided with the load transfer facility.

FIG. 4 is a plan view of a main part of a branching / merging section of the load transporting equipment.

FIG. 5 is a plan view showing an arrangement of permanent magnets at a branching / merging portion of the load transporting equipment.

FIG. 6 is a plan view of a main part of a branching / merging section of a load transporting facility according to another embodiment of the present invention.

[Explanation of symbols]

 V Self-propelled vehicle (moving body) B Rail device C1 Straight track C2 Branching / merging track D Load E Branching / merging section 1 Self-propelled vehicle body 3 Loading platform 5 Pickup coil 11 Running wheel 12 Lateral movement regulating wheel 13 Linear motor ( Primary) 14 linear motor driver 21 transfer wheel 22 seesaw 24 drive unit 31 running rail 44,44A, 44B magnetic pole piece 45 guide rail 47 guide line 51,52 protection plate (protection material)

Claims (4)

[Claims] 1. A coil to which a current is supplied to a moving body is provided, and magnetic pole pieces of N pole and S pole are alternately arranged along the trajectory of the moving body so as to face the coil, and are arranged on the coil. A moving body that obtains thrust by feeding power to move the load, and conveys the load, wherein at least a wheel of the moving body traverses the branch or the junction at a branch or a junction of the track; And a protection member for covering the pole piece is disposed in the passage portion. 2. The load transport equipment according to claim 1, wherein the magnetic pole pieces of the N pole and the S pole are double-laminated and arranged at the branch portion or the merging portion of the track. 3. A trajectory branching section in which N-pole and S-pole magnetic pole pieces whose widths are sequentially increased from a predetermined ratio of the trajectory width are arranged on a straight trajectory, and the divergence is branched from the straight trajectory. The magnetic pole pieces of the N-pole and the S-pole, whose widths are sequentially increased from the remaining ratio of the predetermined ratio of the linear trajectory along the inner circumference of the branch trajectory, along the inner circumference of the branch trajectory, The load transport equipment according to claim 1, wherein the load transport equipment is arranged so as to fill the track width. 4. At the merging portion of the orbit, magnetic pole pieces of N and S poles whose widths are narrowed in order from the orbital width are arranged on a straight orbit, and the converging orbit merges with the straight orbit. The N pole and S pole pole pieces whose widths are sequentially reduced from the track width along the inner circumference of the track are arranged so as to fill the track width of the pole pieces of the linear track. Item 3. The load transport equipment according to Item 2.