JP4228540B2 - Transport vehicle system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact power supply system that supplies electric power from a power supply line in a contactless manner to a tracked vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a technique is known in which a transport carriage is run on a track in order to transport articles in a factory or warehouse. There are internal combustion engines and motors as drive sources for these transport carts, but the drive source using an internal combustion engine that generates exhaust gas when working in a closed space such as a factory deteriorates the environment. Usually, a motor is used. The electric power for operating this motor includes a battery type and a method of supplying from an electric wire. However, in the case of the battery type, since it is necessary to charge every predetermined process (time), a charging station is provided, Whenever the power stored in the battery is consumed, it is necessary to stop at the charging station and stop charging there. For this reason, for example, in the transport system in the factory, the time for this charging is necessarily required, so that the work efficiency has deteriorated.
[0003]
Such a problem can be solved by a feeder line system, which is a contact type and a non-contact type. As a contact-type power supply line system, as seen in trains, monorails, etc., the power supply contact body is always brought into contact with the power supply line to supply power. Maintenance is indispensable in order to wear out, and it is necessary to replace | exchange parts of a contact part regularly. Also, the contact-type power supply method cannot be used in an explosion-proof area because there is a risk of sparks occurring at the contact portion. Further, since metal powder is generated when the contact portion is worn, there is a problem that foreign matters such as the metal powder cannot be used in a clean room such as a semiconductor manufacturing factory which causes impurities to be mixed.
[0004]
On the other hand, the non-contact type power supply line system is used in a clean room because there is no contact portion and dust is not generated and power can be supplied constantly.
As shown in FIG. 7, the structure of this non-contact power feeding system is provided with a structure body 6 along a rail that becomes a track, and a pair of the structure body 6 via support members (feed wire holders) 2 and 2. The feeder lines 5 and 5 are installed. On the other hand, a power receiving unit 9 is provided on the conveyance carriage side. The power receiving unit 9 is provided with a substantially E-shaped core 3 so as to surround the feeder lines 5 and 5, and a pickup coil 4 is wound around the core 3 to supply power. When an alternating current flows through the electric wires 5 and 5, an electric current is generated in the pickup coil 4 and power is supplied to a motor or the like of the transport carriage.
[0005]
[Problems to be solved by the invention]
Conventionally, in a transport vehicle system using non-contact power feeding, it is known that power receiving efficiency is improved when a power feeding line is arranged on the inner side of the core.
However, in the prior art, as shown in FIG. 7, the openings of the support members 2, 2 are formed facing the back side of the core 3 so that the feeders 5, 5 can be easily inserted into the support members 2, 2. Has been. For this reason, if the feed lines 5 and 5 partially protrude upward and the feed lines 5 and 5 are poorly inserted into the support member 2, the core 3 and the feed lines 5 and 5 may come into contact with each other. The feeder lines 5 and 5 had to be separated from the inner wall of the core 3 more than necessary. Then, the feeding lines 5 and 5 are separated from the core 3 to cause a decrease in power receiving efficiency.
Then, this invention provides the conveyance vehicle system which can arrange | position a feeder to the back | inner side of a core reliably.
[0006]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
That is, in claim 1, a feed line holder having a feed line support portion in which an insertion port for supporting a feed line and inserting a feed line is formed, and an opening through which the feed line support portion can pass. A receiving vehicle core and a pickup coil wound around the power receiving core , wherein the opening direction of the insertion port and the opening direction of the power receiving core are substantially orthogonal to each other, wherein the power receiving core has an E-shape. The pickup coil is wound around a projecting portion formed between the openings of the power receiving core, the pickup coil is disposed between the pair of feeder support portions, and the insertion port is connected to the pickup coil. It is formed so as not to face each other.
[0007]
According to a second aspect of the present invention, the feeder line holder is fixed to a guide rail, and the feeder rail holder and the power receiving core positioning means are provided on the guide rail .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a non-contact power feeding system according to an embodiment of the present invention will be described with reference to the drawings. The tracked vehicle system using the contactless power supply method will be described.
[0010]
FIG. 1 is a diagram schematically illustrating a transport vehicle system that supplies power from a power supply line in a contactless manner. In FIG. 1, the track 12 is laid on the moving path of the transport vehicle 13, and the feeder line 5 in which a conductive wire such as a copper wire is covered with an insulating material is disposed along the track 12, A plurality of stations 10, 10 are arranged so that the transport vehicle 13 can move between the stations 10, 10 to transport articles from one station 10 to the other station 10.
[0011]
An AC power supply 11 is provided at one end of the feeder lines 5 and 5 so that power can be supplied at a predetermined frequency. The transport vehicle 13 is installed so as to reciprocate on the track 12 and, if the track 12 is formed in a ring shape, is circulated, and is driven by driving a motor with a high-frequency current supplied from the AC power supply 11. Like to do. The transport vehicle 13 has a power receiving unit 9 for obtaining power from the power supply line 5, and moves on the track 12 using power taken out by the power receiving unit 9.
[0012]
The carrier 13 may be a floor carrier or an overhead carrier. First, an embodiment in which the present invention is applied to a floor carrier will be described.
[0013]
2 and 3 show an embodiment in which the present invention is applied to an on-floor transport vehicle 13A as the transport vehicle 13. FIG.
The rails 43 and 45 constituting the track 12 are fixed on the floor, and the wheels 40 and 40 of the floor conveyance vehicle 13A travel on the rails 43 and 45 by driving the motor. And the power receiving unit 9 is arrange | positioned at one side (rail 43 laying side) of the wheel 40 outside.
[0014]
On the rail 43, the feeder holder 24 is fixed along the rail 43 in the longitudinal direction. The feeder holder 24 has feeder support portions 24b and 24b extending upward, and the feeder support portions 24b and 24b are connected by a base portion 24d so as to be substantially U-shaped in a sectional view as a whole. Is formed. An insertion port 24a for inserting the power supply line 5 is formed in the upper part of the power supply line support 24b. The power supply line 5 is supported by the power supply line support 24b by inserting the power supply line into the insertion port 24a. To be.
The power supply line holder 24 is made of, for example, a non-magnetic material and a non-combustible or flame retardant resin that can be easily molded, and the center protrusion 3a of the core 3 is disposed between the power supply support parts 24b and 24b. As described above, the feeder support 24b is formed so as to stand on both side surfaces of the base 24d, and is continuously formed along the longitudinal direction of the rail 43. The power supply line support part 24b includes a grip part for gripping the power supply line 5 and a leg part that keeps the grip part at a predetermined height position from the base part 24d. The grip part is formed with an insertion port 24a. Due to this elasticity, the feeder 5 can be inserted and held from the insertion port 24a. Due to such a configuration, the feeder 5 is continuously arranged at a predetermined height position of the recess of the core 3, and even if an insertion error occurs, the feeder 5 protrudes from other than the insertion port 24a. It is supposed not to.
In this way, the feed lines 5 and 5 that form a pair of forward and return paths are installed on the feed line holder 24.
[0015]
The power reception unit 9 includes a bracket 26 and a core 3 fixed in the bracket 26. The bracket 26 is fixed to the floor conveyance vehicle 13 </ b> A, and the power receiving unit 9 is disposed so as to surround the power supply line 5.
The core 3 is formed in an E-shape in cross-sectional view, and is composed of projecting portions 3b and 3b on both sides, a central projecting portion 3a, and back walls 3c and 3c that bridge the projecting portions 3a and 3b on both sides. The The core 3 has two openings (concave portions) formed between the projecting portions 3a and 3b and the back wall 3c, and the openings are formed facing downward, so that the feeder line support portion 24b is formed. 24b can be inserted from below the core 3 toward the opening.
A pickup coil 4 for taking out electric power is wound around the protruding portion 3a.
[0016]
When a (high frequency) current is passed through the feed line 5, a magnetic field surrounding the feed line 5 is generated. If the direction of the current flowing through the feeder lines 5 and 5 is in a state as shown in FIG. 3 at a certain moment, the magnetic flux generated by the current forms the magnetic circuit 14 and 15, and the direction is the direction indicated by the arrow. It becomes.
Since the magnetic flux mainly passes through a portion having a high magnetic permeability, if a ferromagnetic material is disposed around the feeder line 5 and a current is passed, the magnetic flux mostly passes through the ferromagnetic material. Since the core 3 is made of a ferromagnetic material made of ferrite, a magnetic circuit 14 that makes a round around the core 3 in a sectional view is formed by a current flowing through the feeder 5.
Moreover, since the core 3 has an opening below, the magnetic flux extends downward from the core 3 side to the rail 43 side on the floor. In order to prevent the rail 43 from generating heat due to the magnetic flux, a ferromagnetic circuit 32 is provided inside the feeder holder 24 and a ferromagnetic body 32 is provided through which the magnetic flux deviated from the magnetic circuit 14 easily passes. 15 through. Shelves 24c and 24c are formed substantially horizontally in the middle of the upper and lower sides inside the feeder holder 24, and the ferromagnetic body 32 is fixed on the shelves 24c and 24c.
[0017]
The pickup coil 4 receives a magnetic field generated by flowing a high-frequency current through the feeder lines 5 and 5. Then, using the electromagnetic induction phenomenon, the power receiving unit 9 extracts power from the voltage generated in the pickup coil 4 due to the change in the magnetic flux. In this way, electric power is supplied from the power supply lines 5 and 5 to the power receiving unit 9 in a non-contact manner, and the driving motor is driven or electric power is supplied to the control device.
The core 3 and the ferromagnetic body 32 are preferably ferrite having high magnetic permeability and high electrical resistance, but may be a low carbon steel plate or a silicon steel plate. In particular, the core 3 and the ferromagnetic body 32 are made of ferrite, so that magnetic flux is collected in these members, and power loss due to the generation of eddy currents is suppressed to further improve the feeding characteristics.
[0018]
Conventionally, it has been known that the power receiving efficiency is improved when the power supply lines 5 and 5 are arranged on the inner side of the core 3. This is because the core 3 is provided with an opening, so that the magnetic flux diffusing out of the core 3 increases as the position of the power supply line 5 approaches the opening side, and a metal member (magnetic body) other than the core 3 or the like. This is presumed to cause power loss.
[0019]
In this embodiment, the insertion ports 24a and 24a formed in the feeder support portions 24b and 24b are configured so that the opening direction thereof and the opening direction of the core 3 are substantially orthogonal to each other, and the inner walls 3c and 3c of the core 3 are formed. And the insertion openings 24a and 24a are not opposed to each other. Even if there is an attachment error (partially upward projection of the power supply lines 5 and 5) at the vertical position in the longitudinal direction due to poor insertion or the like, the power supply lines 5 and 5 It does not come into contact with the walls 3c and 3c.
In this way, the back walls 3c and 3c of the core 3 and the feed line support portions are made to face the back walls 3c and 3c of the core 3 and the portions other than the insertion ports 24a and 24a of the feed line support portions 24b and 24b. The distance between 24b and 24b can be made constant. For this reason, it is possible to arrange the feeders 5 and 5 as close to the inner walls 3c and 3c of the core 3 as possible, and the power receiving efficiency in the power receiving unit 9 can be increased. In particular, by forming the insertion ports 24a and 24a of the feeder support sections 24b and 24b in the horizontal direction, the distance between the feeder lines 5 and 5 and the inner walls 3c and 3c of the core 3 is always constant, and more The power receiving efficiency in the power receiving unit 9 can be increased.
[0020]
As described above, the feeder support portions 24b and 24b are respectively inserted into the two openings of the core 3, and the feeder feeder 24 is disposed so that the pickup coil 4 is sandwiched between the feeder support portions 24b and 24b. Has been.
The insertion port 24a is formed toward the outside of the protruding portion 3a so as not to face the pickup coil 4. For this reason, the feeders 5 and 5 and the core 3 do not come into contact with each other due to poor insertion or the like.
[0021]
In addition, as shown in FIG. 6, it is also possible to employ a configuration in which the power supply lines 5 and 5 do not contact the core 3 and the pickup coil 4 by using a power supply line holder 27 having another configuration. In the feeder line holder 27, the opening direction of the insertion ports 27a and 27a into which the feeder lines 5 and 5 are inserted is set downward.
In other words, the feeder holder 27 also has feeder support portions 27b and 27b extending upward, and the feeder support portions 27b and 27b are connected by the base portion 27d so as to be substantially U-shaped in cross-section as a whole. Is formed. In order to insert the feeder 5 into the upper portion of the feeder support 27b, it is configured in an inverted U shape so that the insertion port 27a opens downward, and the feeder 5 can be easily detached at the tip. Inward convex portions are formed so as not to exist. Then, a feeder line is inserted into the insertion port 27a from below so that the feeder line 5 is supported by the feeder line support portion 27b.
For this reason, even if a mounting failure or the like occurs, the feeder 5 protrudes only downward, and does not come into contact with the inner wall of the core 3 or the pickup coil 4.
[0022]
The rail 43 constitutes a traveling surface 43a on which one of the traveling wheels 40 travels. As a means for positioning the core 3 with respect to the rail 43, a guide protrusion 43b is erected upward on the side of the running surface 43a, and the guide rollers 44 and 44 are disposed so that the side surfaces of the guide protrusion 43b are guide surfaces. ing. And the floor conveyance vehicle 13A is prevented from shifting in the left-right direction during traveling.
Further, ribs 43 c and 43 d are integrally formed at the other end of the rail 43 as positioning means for the feeder 43 with respect to the rail 43. The ribs 43c and 43d are shaped so as to protrude from the rail 43, and the base 24d of the feeder holder 24 is fitted between the ribs 43c and 43d. That is, when the feeder holder 24 is attached to the rail 43, the base portion 24d can be easily positioned by being fitted between the ribs 43c and 43d, and is fixed in a state in which the base portion 24d is in contact therewith. However, in the present embodiment, the ribs 43c and 43d are configured to extend long along the rail as protrusions, but pin-like members are protruded and arranged, or a recess is provided along the rail to provide a feeder line holder. It is also possible to provide a configuration in which a convex portion is provided at the lower portion of the ridge, and the convex portion is fitted into the concave portion.
In this embodiment, the rib 43c is formed on the rail 43 and the guide rollers 44 and 44 are brought into contact with each other. However, the outer sides of the ribs 43c and 43d are used as guide surfaces, and the guide rollers 44 and 44 are brought into contact with each other. Anyway. With such a configuration, the guide surfaces of the guide rollers 44 and 44 and the positioning means for the feeder holder 24 can be used.
In the present embodiment, the ferromagnetic body 32 is disposed on the shelf 24c. However, the ferromagnetic body may be disposed on the surface of the rail 43 according to the application. Further, the arrangement of the ferromagnetic material may be adjusted depending on the application.
[0023]
In such a configuration, an arrangement configuration in which there is no part other than the power supply line holder 24 on the side of the power receiving unit 9 is made so that the power supply efficiency is not deteriorated or attracted by the generation of a magnetic field.
[0024]
Next, an embodiment in which the present invention is applied to an overhead conveyance vehicle will be described. FIG. 4 is a cross-sectional view when the transport vehicle system of the present invention is applied to an overhead transport vehicle, and FIG. 5 is an enlarged view of a power feeding unit.
In FIG. 4, a rail 20 constituting the track 12 is formed in an inverted U shape in cross section and is fixed to the ceiling. A ceiling transport vehicle 13B is disposed as a transport vehicle 13 in the recess of the rail 20, and the ceiling transport vehicle 13B includes a traveling unit 21 at the upper portion and a mounting portion 22 so that a load can be loaded at the lower portion. The power receiving unit 9 is arranged in the section.
[0025]
The power receiving units 9 and 9 are respectively disposed on the left and right of the lower portion of the traveling unit 21. The power receiving units 9 and 9 are positioned on both sides of the power receiving unit 9 and on the lower surfaces of both sides of the rail 20. Is arranged.
[0026]
In the case of the ceiling transport vehicle 13B, the power receiving unit 9 is arranged so that the opening direction of the core 3 is outward (side) with respect to the ceiling transport vehicle 13B.
On the other hand, the feeder line holder 30 is formed in a substantially E shape, and the feeder line support portions 30a and 30a protruding in parallel in the horizontal direction from the support portion 30f are aligned with the intervals of the protrusion portions 3a, 3b, and 3b of the core 3. , Inserted into the recess space. Insertion ports 30b and 30b are formed at the distal ends of the feeder support portions 30a and 30a, and the feeders 5 and 5 are inserted into the insertion ports 30b and 30b. And the front-end | tip of feeder line support part 30a * 30a is arrange | positioned in the back | inner side (closed | closed side) rather than the center of recessed part space, and hold | maintains the feeder lines 5.
[0027]
On the upper side of the projecting portion 3a of the core 3, an insertion port 30b is formed so that the top is opened at the tip of the feeder support portion 30a. In addition, an insertion port 30b is formed on the lower side of the protruding portion 3a of the core 3 so that the lower side is opened at the tip of the feeder support portion 30a.
Then, as in the case of the on-floor transport vehicle 13A, the leading ends of the feeder support portions 30a and 30a are set so that the opening direction of the insertion ports 30b and 30b and the opening direction of the core 3 are substantially orthogonal, and the insertion ports 30b and 30b are picked up. The coil 4 is not opposed to the coil 4.
[0028]
A convex engagement portion 30c is formed at the upper end of the feeder holder 30, and a concave engagement groove 20c is formed on the lower surface of the rail 20, so that the engagement portion 30c can be inserted and fixed. I have to.
And the engaging groove 20c provided in the rail 20 constitutes a positioning means for the rail 20 of the power supply line holder 30 so that the power supply line holder 30 can be prevented from being displaced in the left-right direction.
[0029]
With this configuration, when the power supply line is attached or when maintenance is performed, the operation is only to engage the power supply line holder 30 from below, so that it can be easily attached or detached. However, the fixing method is not limited, and it is possible not only to engage and fix, but also to fit or fix with screws.
[0030]
Further, guide wheels 23 and 23 having left and right axles are disposed on both sides of the lower portion of the traveling portion 21, and portions projecting inward in the horizontal direction from below the rail 20 are defined as traveling surfaces 20 a and 20 a.
Guide wheels 26 and 26 having vertical axles are arranged on both sides of the upper portion of the traveling portion 21 to prevent the positional deviation in the lateral direction (the lateral direction of the traveling direction) using the inner side surface of the rail 20 as a guide surface. I can do it. The guide surface provided on the rail 20 constitutes a positioning means for the core 3 with respect to the rail 20.
Further, the traveling drive wheel 25 is disposed substantially at the center of the transport vehicle 13 and is pressed against a traveling surface formed on the inner upper surface of the rail 20 by pressing means such as a spring.
However, the ceiling transport vehicle 13B may be configured to be vertically symmetrical so that a load can be placed thereon.
Moreover, in the Example of the ceiling conveyance vehicle 13B, although the ferromagnetic material is not provided in the feeder line holder 30, you may make it provide according to a use.
[0031]
【The invention's effect】
According to a first aspect of the present invention, there is provided a power supply line holder having a power supply line support part in which an insertion port for supporting a power supply line and inserting a power supply line is formed, and an opening through which the power supply line support part can pass. A transport vehicle system comprising a power receiving core and a pickup coil wound around the power receiving core , wherein an opening direction of the insertion port and an opening direction of the power receiving core are substantially orthogonal to each other, wherein the power receiving core has an E shape The pickup coil is wound around a protruding portion formed between both openings of the power receiving core, the pickup coil is disposed between a pair of the feeder support portions, and the insertion port faces the pickup coil. since it formed so as not to, even if there is an error in the vertical mounting position in the longitudinal direction of the feed line insertion failure or the like, the feed line and the receiving core does not contact. Moreover, since the attachment direction of the feed line is parallel to the surface of the back wall of the core, the distance between the feed line and the back wall is constant, and power receiving efficiency can be improved.
Furthermore, even if there is a poor attachment of the power supply line, the power supply line and the power receiving core do not contact each other. For this reason, even if it makes the opening direction of the said insertion port orthogonal to the opening direction of a receiving core, there is no possibility that a receiving core and a pickup coil may contact.
[0032]
According to a second aspect of the present invention, since the feeder line holder is fixed to a guide rail, and the guide rail is provided with positioning means for the feeder line holder and the power receiving core, the positional relationship between the power receiving core and the feeder line holder is determined. Can be determined reliably. For this reason, the distance between the feeder support portion and the inner wall of the power receiving core can be further shortened and the power receiving efficiency can be increased.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a tracked transport vehicle system in which electric power is supplied from a feeder line in a contactless manner.
FIG. 2 is a cross-sectional view when the transport vehicle system of the present invention is applied to an on-floor transport vehicle.
FIG. 3 is a cross-sectional view of a power reception unit of the above-ground conveyance vehicle.
FIG. 4 is a cross-sectional view when the transport vehicle system of the present invention is applied to an overhead transport vehicle.
FIG. 5 is a cross-sectional view of a power receiving unit of the ceiling transport vehicle.
FIG. 6 is a cross-sectional view showing a power receiving unit including a feeder line holder of another configuration.
FIG. 7 is a cross-sectional view of a power receiving unit of a conventional transport vehicle system.
[Explanation of symbols]
3 Core 3a Protruding part 4 Pickup coil 5 Feed line 13 Car 20/43 Rail 20c Engaging groove 24 Feed line holder 24a Insertion port 24b Feed line support part 43b Guide protrusion 43c / 43d Rib

Claims (2)

A power supply line holder having a power supply line support part in which an insertion port for inserting a power supply line is formed while supporting the power supply line, a power reception core having an opening that can pass through the power supply line support part, and the power reception core A pick-up coil wound around, and a carriage system in which the opening direction of the insertion port and the opening direction of the power receiving core are substantially orthogonal to each other,
The power receiving core is formed in an E shape, the pickup coil is wound around a protruding portion formed between both openings of the power receiving core, the pickup coil is disposed between a pair of the feeder support portions, A carrier system characterized in that the insertion port is formed so as not to face the pickup coil . 2. The transport vehicle system according to claim 1, wherein the power supply line holder is fixed to a guide rail, and the power supply line holder and a positioning means for the power receiving core are provided on the guide rail .

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