JP2001057712A - Linear motor driven carrying vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a linear motor drive carrying vehicle, capable of altering the route of the vehicle without providing an apparatus for switching the route of the vehicle at a traveling route side of the vehicle. SOLUTION: In this carrying vehicle 1, a luggage carrier 3 is supported by a pair of front and rear bogie trucks 2, having a pair of right and left travel wheels 4, and the trucks 2 are coupled to the carrier 3 via rotary joints 5. Primary side movable elements 10 of a linear induction motor are installed on the lower surface of the each truck 2. The elements 10 are directed in the direction for giving thrust force in the direction for coupling winding direction of a coil directly to the axles of the trucks 2 to the elements 10. Electromagnetic brakes 15 are respectively provided at the wheels 4 of the trucks 2. The brakes 15 are electrically connected to a controller 16 provided with the lower surface of the barrier 3 and are independently drivable (braked). The controller 16 drives the brake 15, equipped at a branch side in the case of changing the advancing route by a branch unit 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier driven by a linear motor which carries a primary mover of a linear motor as a drive source and travels along a guide provided along a travel route.

[0002]

2. Description of the Related Art Conventionally, in order to achieve unmanned and efficient operation of transporting articles, a transport vehicle is moved along a predetermined traveling route (for example, a traveling rail), and the articles are transported by the transport vehicle. Transport systems have been proposed.
As an example of this type of transport system, there is a guide rail type transport system that steers a transport vehicle while bringing a steering section of the transport vehicle into contact with a guide rail provided on a floor surface. Further, a device using a linear motor as a driving source of a carrier has been proposed and implemented.

On the other hand, in recent years, when an automatic transport system is employed, not only the transport vehicle travels only on a predetermined straight travel route or a round travel route, but also the route is switched (branch / merge) to perform a travel route pattern. Has been diversified. Conventionally, as a method of causing a transport vehicle driven by a linear motor as a drive source to enter another branched traveling path, as shown in FIG. 6A, a method of providing a turntable 53 at a branch portion 52 of a traveling path 51 (for example, As shown in FIG. 6B, a method of providing a traverser 54 or FIG.
As shown in (a) and (b), there is a method of providing a variable guide 55 (for example, JP-A-58-112456). The variable guide 55 is driven by a driving device (not shown) as shown in FIG.
The position is switched between a straight guide position shown in FIG. 7A and a branch guide position shown in FIG. 7B.

Japanese Patent Application Laid-Open No. Hei 7-231542 discloses a method in which, as shown in FIG. 8, a plurality of wheels 56 rotatably mounted on a carrier and a guide track 57 provided at the center of the traveling path 51 are sandwiched. There has been proposed a switching device 60 that switches the course of a transport vehicle 59 having guide wheels 58. Truck 5
Reference numeral 9 includes a reaction plate (not shown), and moves by a thrust based on the magnetic flux of a linear linear motor 61 and a branch linear motor 62 arranged at predetermined intervals on a traveling path 51. The switching device 60 includes a linear linear motor 61 and a branch linear motor 62 provided alternately in the branch section 52. When the transport vehicle 59 passes through the branch portion 52 and advances to the branch side, when the linear linear motor 61 and the branch linear motor 62 in the branch portion 52 are simultaneously excited, the transport vehicle 59 advances to the branch side. I do. When only the linear motor 61 in the branch portion 52 is excited, the transport vehicle 59 moves straight.

[0005]

In each of the above-mentioned conventional devices, a driving device or linear motors 61 and 62 for switching the course are provided on the traveling route side. Therefore, when changing the course layout, it is necessary to change the position of the route switching device, which requires a large amount of work.

When the turntable 53 and the traverser 54 are used, the mechanism is complicated, there are many failures, and the cost is high. In addition, it is necessary to drive the turntable 53 and the traverser 54 to a predetermined position in a state where the carrier stops at a position corresponding to the turntable 53 and the traverser 54, and it takes time for the carrier to pass through the branch portion 52. . As a result, there is a problem that the congestion of the transport vehicle at the branching portion easily occurs, and the transport capacity of the transport system is reduced. Further, a control device for obtaining information on the position of the carrier with respect to the branching section and controlling the respective route switching devices is required, and the control required for changing the route is complicated. There is also a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to change the course of a carrier without providing a device for switching the route of the carrier on the traveling route side of the carrier. It is an object of the present invention to provide a linear motor-driven conveyance vehicle that can perform such operations.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a primary mover of a linear motor is mounted as a drive source, and a guide provided along a travel path is provided. And a braking means for applying a braking force to a traveling wheel of the carrier provided at least on a side corresponding to a branch side of the branch of the travel path, wherein the vehicle has a traveling path. A control means is provided for driving the braking means provided on the branch side when changing.

According to a second aspect of the present invention, in the first aspect of the present invention, the transport vehicle is connected to the vehicle body so as to be relatively rotatable about a vertical axis to support the vehicle body and make a pair of traveling. A bogie having wheels is provided at least on the front side in the traveling direction, and the braking means applies a braking force to running wheels of the bogie.

According to a third aspect of the present invention, in the second aspect of the present invention, the carrier has a body supported by the front and rear two bogies, and each of the bogies has the primary movable element and Equipped with braking means.

According to a fourth aspect of the present invention, in the third aspect of the present invention, when the course of the transport vehicle is changed at the branching section, the control means controls the traveling wheels on the branch side of both bogies. A braking force is applied to drive the linear motor of the bogie on the rear side.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, a linear induction motor is used as the linear motor. Therefore, according to the first aspect of the present invention, the carrier carries the primary mover of the linear motor as a drive source, and travels along a guide provided along a travel route. When the route of the transport vehicle changes when the transport vehicle passes through the branch portion, a braking force is applied to the traveling wheels provided on the side corresponding to the branch side of the transport vehicle by the braking means. The transport vehicle receives a thrust in the direction of going straight on the branch by the linear motor, but when braking is applied to the running wheels on the branch side, a force that turns the transport vehicle toward the branch side acts, and the transport vehicle Is guided by the guide and the course is changed to the branch side.

According to a second aspect of the present invention, in the first aspect of the invention, the carrier is provided with a bogie on the front side in the traveling direction of the vehicle body,
A braking force is applied to the traveling wheels on the branch side of the bogie. Then, a turning force acts on the bogie, and the bogie moves smoothly to change the course of the carrier.

According to a third aspect of the present invention, in the second aspect of the present invention, when the course is changed at the branching section, each of the traveling vehicles on the branch side of the two front and rear bogies supporting the vehicle body. The wheels are braked, the bogies are turned, and the course of the carrier is changed more smoothly. Further, the course can be changed not only when the carrier is traveling forward but also when traveling backward.

According to a fourth aspect of the present invention, in the third aspect of the invention, when the course of the carrier is changed at the branching portion, a braking force is applied to the traveling wheels on the branch side of both bogies. . Then, the linear motor mounted on the bogie on the rear side is driven. Therefore, the bogie on the front side is pushed from the rear side in a state where the braking force is applied to the traveling wheel on the branch side, so that it becomes easy to turn, and the course change is performed more smoothly.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, a linear induction motor is used as the linear motor. The configuration is simplified.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1A is a schematic plan view of the carrier 1 and FIG.
(B) is a schematic side view. The carrier 1 has a pair of front and rear bogies 2 supporting a carrier 3 as a vehicle body, and each bogie 2 is provided with a pair of running wheels 4 on the left and right sides.
Each bogie 2 is provided at the center upper part thereof, and is relatively rotatably connected to the carrier 3 via a rotary joint 5 whose rotation axis extends in the vertical direction. That is, a pair of left and right running wheels 4
Is supported on the carrier 3 so as to be pivotable about a vertical axis. Each bogie 2 has a pair of guide wheels 6 rotatably supported on both left and right sides thereof via support shafts 7 extending in a vertical direction. The guide wheels 6 are in contact with the wall surfaces 9a of the pair of guide grooves 9 serving as guides forming the travel route 8, and regulate the movement of the carrier 1 in the width direction.

A primary mover 10 of a linear motor is provided on the lower surface of each bogie 2. A linear induction motor is used as the linear motor. Primary mover 10
Is the direction in which the winding direction of the coil wound around the comb-shaped core applies a thrust to the primary mover 10 in a direction perpendicular to the axle of the bogie 2.

As shown in FIG. 2, a secondary stator 11 of a linear motor is provided between the guide grooves 9 on the traveling route 8. The secondary stator 11 is a single conductor such as aluminum or copper which is a non-magnetic conductor, or a ferromagnetic material (eg, iron)
And a non-magnetic conductor in a plate shape.

As shown in FIG. 1A, a detected portion 13 is provided at a predetermined position on the downstream side of the branch portion 12 of the traveling route 8. The transport vehicle 1 is provided with a sensor 14 for detecting the detected portion 13. The radius of the traveling wheel 4 is such that when the carrier 1 travels along the guide groove 9, the primary movable element 10
The distance between the motor and the secondary stator 11 is set within a predetermined range.

Each traveling wheel 4 of the bogie 2 has an electromagnetic brake 1 as braking means for applying a braking force to the traveling wheel 4 provided on the side of the traveling path 8 corresponding to the branch side of the branch portion 12.
5 are provided. The electromagnetic brake 15 is configured to directly restrict the rotation of the traveling wheel 4. Each of the electromagnetic brakes 15 is electrically connected to a control device 16 provided on the lower surface of the carrier 3 and can be independently driven (braked).

The control device 16 has a CPU and a memory (both not shown). The output signal of the sensor 14 that detects that the vehicle has approached the branching unit 12 is input to the control device 16, and the control device 16 transmits the signal to a higher-level control device (for example, a control device of a transport system equipped with the transport vehicle 1). )
And outputs a linear motor acceleration / deceleration command and a stop command based on the command signal.

The control device 16 detects the detection target 1 from the sensor 14.
When the detection signal of No. 3 is input, the branching unit 12 determines whether or not to change the course. When changing course, the controller 16
Outputs a braking command signal to the electromagnetic brake 15 of the traveling wheel 4 on the branch side of the bogie 2 on the front side in the traveling direction, and controls so that only the linear motor of the bogie 2 on the rear side is driven. The driving time of the electromagnetic brake 15 is determined by
Is set to a time sufficient to pass through the branching section 12. After the transport vehicle 1 passes through the branching section 12, the two linear motors are controlled again to have the same thrust.

A battery (not shown) is mounted on the carrier 1 as a power source for the linear motor, the sensor 14 and the control device 16. Next, the operation of the carrier 1 configured as described above will be described. The control device 16 receives a command such as a transfer destination from a higher-level control device via a communication unit (not shown), and controls the traveling of the transfer vehicle 1 to transfer a load between predetermined stations. When the primary side mover 10 is energized, an eddy current is generated at a position corresponding to the primary side mover 10 of the secondary side stator 11 and a predetermined direction (in this embodiment, a direction orthogonal to the axle of the bogie 2) ) Thrust is generated. Then, the reaction force of the thrust becomes a thrust F for moving the primary-side mover 10, and the carrier 1 travels along the traveling route 8 by the thrust F.

When the transport vehicle 1 approaches the branch portion 12, the sensor 1
When the detection signal of the detected portion 13 is output from 4, the control device 16 determines whether to go straight through the branching portion 12 or to change the course. When the control device 16 determines that the vehicle is going straight, power is supplied to each of the primary movers 10 as before, and the carrier 1 goes straight through the branching portion 12.

On the other hand, when the controller 16 determines that the course is to be changed, the electromagnetic brake 15 on the branch side of both bogies 2 is driven, and a braking force is applied to the corresponding running wheels 4. Also, the energization of the linear motor of the front bogie 2 is stopped. That is, the front bogie 2 is pushed by the rear bogie 2 in a state where the braking force is applied to the traveling wheels 4 on the branch side. As a result, the turning force toward the branch side with the rotary joint 5 as the center of rotation easily acts on the bogie 2 on the front side smoothly.

Then, the transport vehicle 1 enters the branch portion 12 with both bogies 2 being subjected to a turning force toward the branch side around the rotation joint 5 as a rotation center, that is, a counterclockwise rotation moment in FIG. I do. The traveling wheel 4 is connected to the branch road 12.
When the bogie 2 moves to the position corresponding to the curved guide groove 9 on the a side, the bogie 2 is rotated with respect to the carrier 3 so that the running wheel 4 rolls along the curved guide groove 9, and the carrier 1
Changes the course toward the branch road 12a and travels. After the traveling wheel 4 of each bogie 2 passes the branch portion 12, braking of the electromagnetic brake 15 is released, and electric power is also supplied to the front primary movable element 10 in the same manner as the rear primary movable element 10. Supplied.

This embodiment has the following effects. (1) Transport vehicle 1 traveling along guides (guide grooves 9)
A braking means (electromagnetic brake 15) for applying a braking force to the traveling wheels 4 provided at least on the side of the traveling route 8 corresponding to the branch side of the branching portion 12 is provided. The braking means provided on the side is driven to change the course of the carrier 1. Therefore, the route of the carrier 1 can be changed without providing a device for switching the route of the carrier 1 on the traveling route 8 side of the carrier 1.

(2) The carrier 1 is connected to the carrier 3 so as to be relatively rotatable about a vertical axis, supports the carrier 3, and moves the bogie 2 having a pair of running wheels 4 at least forward in the traveling direction. To apply a braking force to the traveling wheels 4 on the branch side of the bogie 2 when changing course. Therefore, the bogie 2 is turned and the course can be changed smoothly.

(3) When the electromagnetic brake 15 is directly
, The braking force is efficiently applied to the traveling wheels 4. (4) The carrier 1 is a bogie 2 having two loading platforms 3 in front and behind.
, And each of the bogies 2 has a primary mover 1
0 and an electromagnetic brake 15 are provided. Therefore, when the course is changed in the branching section 12, each of the bogies 2 is turned by turning each of the traveling wheels 4 on the branching side of the two front and rear bogies 2 that support the loading platform 3, whereby the bogies 2 are turned. The course change is performed more smoothly. Further, the course can be changed not only when the transport vehicle 1 is traveling forward but also when traveling backward.

(5) The control device 16 applies a braking force to the running wheels 4 on the branch side of the bogies 2 when changing the course of the carrier 1 at the branching section 12, and linearly moves the bogies 2 on the rear side. Control to drive the motor. Therefore, the bogie 2 on the front side is pushed from the rear side while the braking force is applied to the traveling wheel 4 on the branch side, so that it becomes easy to turn, and the course change is performed more smoothly.

(6) Since a linear induction motor is used as the linear motor, a metal plate can be used as the secondary-side stator 11, and the branch section 12 does not need to have a special structure, so that the configuration is simplified. .

(7) Since the transport vehicle 1 travels along the guide groove 9 as a guide by the action of the guide wheels 6, the turning force toward the branch road 12 a acts on the bogie 2 at the branch portion 12. Just by controlling, the course of the transport vehicle 1 can be changed to the branch path 12a side without requiring accurate control of the turning force.

(8) The carrier 1 travels along guide grooves 9 provided on the left and right sides of the carrier 1 for guiding the traveling wheels 4. Therefore, compared to a configuration in which the vehicle is guided and guided by a guide rail provided at a position corresponding to the center in the width direction of the transport vehicle 1, there is more freedom in the installation location of the primary mover 10 of the linear motor mounted on the transport vehicle 1. The degree increases.

(9) Since each linear motor mounted on each bogie 2 is controlled independently, the rotational moments of the front and rear bogies 2 can be independently and finely controlled, and the course can be smoothly changed. And energy consumption can be reduced. For example, the sensor 14
When the detection signal of the detection unit 13 is input from the controller, the electromagnetic brakes 15 on the traveling wheels 4 of the rear bogie 2 are replaced with the electromagnetic brakes 15 on the branch side of the front and rear bogies 2 at the same time. The driving timing is delayed so that the bogie 2 is controlled so as to start braking when the bogie 2 approaches the branch portion 12. In this case, the traveling wheel 4 of the rear bogie 2 is steered in the turning direction and the rolling distance while sliding on the guide groove 9 is shortened, so that wasteful energy consumption is reduced.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. In this embodiment, the structure of a braking means for applying a braking force to the running wheels 4 is different from that of the above-described embodiment. The same parts as those of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The braking means includes an iron plate 17 disposed near the branch path 12a of the branch portion 12 and the traveling wheels 4 of each bogie 2.
, And an electromagnet 18 provided at a position corresponding to the axle. Each electromagnet 18 is connected to the controller 16
The excitation and demagnetization are controlled independently of each other. The control device 16 controls the detection target 1 from the sensor 14.
When it is determined that the course change is necessary by inputting the detection signal of No. 3, the electromagnet 18 on the branch side of each bogie 2 is excited.

In this embodiment, when the course of the transport vehicle 1 is changed in the branching section 12, the electromagnet 18 on the branch side is excited and electric power is supplied only to the primary movable element 10 of the bogie 2 on the rear side. Supplied. Then, when the energized electromagnet 18 moves to a position corresponding to the iron plate 17, the traveling wheel 4 on the branch side is strongly pressed downward by the attraction of the electromagnet 18, and the braking force is applied to the traveling wheel 4. It will be in a working state. As a result, a turning force acts on the bogie 2, and when the traveling wheel 4 moves to a position corresponding to the curved guide groove 9 on the branch road 12 a side, the traveling wheel 4 rolls along the curved guide groove 9. The bogie 2 is rotated with respect to the carrier 3 so as to move, and the carrier 1 changes its course toward the branch road 12a and travels.

This embodiment has the following effects in addition to the same effects as (1), (2), (4) to (8) of the above embodiment. (10) Since the braking force is applied to the traveling wheels 4 by the attractive force of the iron plate 17 fixed to the traveling route 8 and the electromagnet 18, the range in which the braking force is applied is determined by the installation position of the iron plate 17. Therefore, even when the electromagnet 18 is excited at a position where braking is not required, no braking force is applied, and there is no possibility that useless braking force is applied to the traveling wheels 4. Further, even if the excitation time of the electromagnet 18 is not strictly set, the braking force is applied to the traveling wheels 4 when the bogie 2 moves to a desired position, so that the course can be changed smoothly.

(11) Each traveling wheel 4 is provided with an electromagnetic brake 15
Since there is no need to incorporate the slab, the structure is simplified and the manufacturing cost is reduced. (12) Since no braking force is applied directly to each of the running wheels 4, each of the running wheels 4 does not slip, and the factor of dust generation is reduced. Therefore, it is more suitable when the transport vehicle 1 is applied to a clean room.

The embodiment is not limited to the above, and may be embodied as follows, for example. In the case of the transport vehicle 1 used in the travel route 8 having a configuration in which the branch path 12a of the branch portion 12 is always present on the same side, for example, only on the left side in the traveling direction, the branch of the traveling wheels 4 provided in the A braking means (electromagnetic brake 15, electromagnet 18) for applying a braking force only to the traveling wheels 4 mounted on the road side may be provided.

In the case of the braking means having a configuration in which a braking force is applied by the electromagnet 18 provided on the side of the transport vehicle 1 as in the second embodiment, if the traveling path 8 is made of a magnetic material (for example, iron) It is not necessary to provide the iron plate 17. However, the electromagnet 18
Excitation is always applied with a braking action. Therefore, in order to avoid giving unnecessary braking force, it is necessary to set and control the excitation timing accurately.

The mounting position of the electromagnet 18 is not limited to the position where the attraction force acts so as to press the running wheel 4 against the running surface. The electromagnet 18 is mounted on the side surface of the bogie 2 and Electromagnet 18 near 12
A magnetic body may be provided at a position opposite to.

The primary mover 10 is provided only on one bogie 2 without providing the primary mover 10 on both bogies 2.
May be provided. If the arrangement of the traveling route 8 is such that the traveling path 8 passes through the branching portion 12 only by forward traveling, the primary movable element 10
Is preferably provided on the rear bogie 2, but may be provided on the front bogie 2.

The carrier 1 is not necessarily limited to a configuration in which the loading platform 3 is supported by two front and rear bogies 2, and FIG.
As shown in the figure, the front side of the carrier 3 is supported by the bogie 2
The rear side of the carrier 3 cannot turn with respect to the carrier 3 and the traveling wheels 4
It may be configured to be supported by the running wheels 19 provided at the same interval (tread). The rear side of the loading platform 3 may be a three-wheeled vehicle that is supported by running wheels that are rotatably supported on the loading platform 3 about a vertical axis.

As shown in FIG. 5B, one guide groove 20 is provided on the traveling route 8 as a guide for guiding the carrier 1. Then, guide wheels 23 and 24 rotatably mounted on support shafts 21 and 22 provided to extend vertically are provided at the front center of each bogie 2. In this case, one guide groove 20 is sufficient.

The guide for guiding the carrier 1 is not limited to the groove, but may be a ridge (rail). In the case of a ridge, a guide wheel for holding the ridge is provided on the side of the carrier 1. As a means for detecting that the transport vehicle 1 approaches the branch portion 12, instead of providing the detected portion 13 and the sensor 14, the rotation speed of the traveling wheel 4 of the transport vehicle 1 is detected, and the radius of the traveling wheel 4 is detected. The running distance may be calculated from the rotation speed and the rotation speed, and the position of the branching unit 12 may be recognized based on the running distance from the reference position.

Instead of supplying power required for driving the carrier 1 from a battery, a trolley wire is provided along the traveling route 8 and a contact is provided on the carrier 1 side to supply power from the trolley wire. Or the power supply line may be arranged along the traveling route 8 to supply power from a power supply line by non-contact power supply.

A linear motor other than a linear induction motor, for example, a linear pulse motor or a linear synchronous motor may be used as the linear motor. In this case, the guide wheel 6
A guide groove 9 for guiding the like is indispensable. When the course is changed to the branch path 12a side at the branching section 12, accurate synchronous driving is not possible, but since the running wheels 4 roll along the guide grooves 9, etc., the course is changed in a coasting state where a certain amount of turning force is applied. Is performed.

The technical ideas (inventions) other than those described in the claims which can be grasped from the embodiment will be described below together with their effects. (1) In the invention according to any one of claims 1 to 5, the guides are provided on both sides along a traveling route of the carrier. In this case, as compared with a guide provided at a position corresponding to the center in the width direction of the transport vehicle, the degree of freedom of the installation position of the primary mover of the linear motor mounted on the transport vehicle is increased.

(2) In the invention according to any one of the first to fifth aspects, the braking means is an electromagnetic brake provided on a traveling wheel. In this case, the braking force is efficiently applied to the running wheels.

(3) In the invention as set forth in any one of claims 1 to 5, the braking means corresponds to a magnetic body provided near a branch portion of a running path and an axle near the running wheel. And an electromagnet provided at a position where the In this case, the range in which the braking force is applied to the running wheels can be set at the installation position of the magnetic body, and the course can be smoothly changed without accurately controlling the operation timing of the electromagnet.

[0053]

As described in detail above, according to the first to fifth aspects of the present invention, the device for switching the route of the carrier is not provided on the traveling route side of the carrier. You can change course.

According to the second aspect of the present invention, when the course is changed, the bogie is turned so that the course can be changed smoothly. According to the third aspect of the present invention, the two bogies that support the vehicle body are turned before and after, and the course of the carrier is smoothly changed. Further, the course can be changed not only when the carrier is traveling forward but also when traveling backward.

According to the fourth aspect of the invention, the bogie on the front side is pushed from the rear side while the braking force is applied to the traveling wheels on the branch side, so that it becomes easy to turn, and the course change can be performed more smoothly. Will be .

According to the fifth aspect of the present invention, since a linear induction motor is used as the linear motor, a metal plate can be used as the secondary stator, and a special structure needs to be provided even at the branch portion. Configuration becomes simpler.

[Brief description of the drawings]

1A and 1B show a first embodiment, in which FIG. 1A is a schematic plan view of a carrier, and FIG. 1B is a schematic side view of the carrier.

FIG. 2 is a partial cross-sectional view of a traveling route.

FIG. 3 is a schematic plan view illustrating an operation.

FIG. 4 is a schematic plan view of a second embodiment.

FIG. 5A is a schematic plan view of a carrier according to another embodiment, and FIG. 5B is a schematic plan view when a guide is changed.

FIG. 6 is a schematic plan view of a conventional route switching device.

FIG. 7 is a schematic plan view of another conventional path switching device.

FIG. 8 is a schematic plan view of another conventional course switching device.

[Explanation of symbols]

1 ... transport vehicle, 2 ... bogie bogie, 3 ... carrier as body,
4 ... running wheel, 8 ... running route, 9, 20 ... guide groove as guide, 10 ... primary side movable element, 12 ... branch part, 15 ... electromagnetic brake as braking means, 16 ... control device as control means, 18 ... Electromagnet as braking means.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H113 BB06 CC03 CC04 CC06 CC07 CD06 CD08 CD13 DD01 DD08 DD09 EE02 EE03 EE07 EE08 GG03 HH02

Claims (5)

[Claims] 1. A transport vehicle that carries a primary mover of a linear motor as a drive source and travels along a guide provided along a travel route, wherein the transport vehicle has at least a branch side of a branch portion of the travel route. A braking means for applying a braking force to a traveling wheel of the carrier equipped on the corresponding side is provided on the carrier, and a control means for driving the braking unit provided on the branch side when changing course at the branch portion is provided. Linear motor driven carrier. 2. The vehicle according to claim 2, wherein the carrier is connected to the vehicle body so as to be relatively rotatable about a vertical axis, supports the vehicle body, and is equipped with a bogie having a pair of running wheels at least on a front side in a traveling direction. 2. The linear motor driven transport vehicle according to claim 1, wherein the braking means applies a braking force to the running wheels of the bogie. 3. The linear motor drive according to claim 2, wherein the carrier has a vehicle body supported by two front and rear bogies, and each bogie has the primary movable element and a braking means. Transport vehicle. 4. The control means applies a braking force to a branch-side traveling wheel of both bogies when the course of the carrier is changed at the branching section, and drives a linear motor of a rear bogie. The linear motor-driven conveyance vehicle according to claim 3, wherein the control is performed as follows. 5. The linear motor driven transport vehicle according to claim 1, wherein a linear induction motor is used as said linear motor.