JP2001292508A - Linear transport car system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a transport system that is capable of transporting heavy materials at high speed, and that is also simple in structure and clean. SOLUTION: A traveling rail 2 of an inverted-U shape is constituted of left and right rail half part 4, 6, and a primary coil 8 of a linear motor is installed inside them. On a transport car 20, secondary conductors 24, 24 are provided, in such a way as to face both sides 14, 14 of the rail 2 and the car 20 is guided along the sides 14, 14 by guide pins 28, 28. Also, the car 20 travels along the top travel surface of the rail half part 6 on a traveling wheel 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport system using a linear motor.

[0002]

2. Description of the Related Art A primary coil of a linear motor is installed inside a traveling rail having a concave cross section to propel a carrier, and traveling wheels and guide wheels of the carrier are provided on a rail surface provided in the recess of the traveling rail. 2. Description of the Related Art There is known a linear guided vehicle system that travels along a vehicle. In such a system, the guide wheels and the running wheels travel in the recesses of the rail, so that less dust is generated around them. However, there is a problem that the structure of the traveling rail is complicated and the rail cost increases.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a linear carrier system using a traveling rail having a simple structure. Another object of the present invention is to facilitate installation of a primary coil of a linear motor on a traveling rail and to efficiently transmit a propulsive force from the linear motor to a carrier. Another object of the present invention is to facilitate wiring to a linear motor.

[0004]

According to the present invention, there is provided a traveling rail having an inverted U-shaped cross section which supports a traveling wheel of a carrier on an upper surface and guides a guide wheel of the carrier on both sides. There is provided a linear carrier system for propelling a carrier by accommodating a primary coil of a linear motor in a gap between the inverted U-shaped portions (claim 1).

[0005] Preferably, the running rail is formed by combining a left half and a right half separately, and the primary coil is accommodated in a gap between the left half and the right half. The carrier is provided with a secondary conductor so as to face both side surfaces of the traveling rail. Preferably, a duct is provided on a lower surface of the traveling rail, and wiring to the primary coil is provided.

[0006]

According to the present invention, a primary coil of a linear motor is accommodated inside a traveling rail having an inverted U-shaped cross section.
Since the running wheels run on the upper surface of the rail and the guide wheels are guided on both sides, the configuration of the running rail is simplified (claim 1).

According to the second aspect of the present invention, the left and right halves of the traveling rail are integrally connected to each other by fitting or bolting, and the primary rail of the linear motor is inserted into the gap. , The attachment of the primary coil becomes extremely easy. Further, the magnetic field from the primary coil forms a magnetic circuit that returns to the primary coil through the secondary conductors facing the both sides of the running rail, so that the efficiency of the linear motor is high. Along with this, a large amount of cargo can be transported at a high speed with a traveling rail having a simple configuration. According to the third aspect of the present invention, since the duct is provided on the lower surface of the traveling rail to accommodate the wiring, the installation of the wiring is also facilitated.

[0008]

1 to 3 show a linear carrier system according to an embodiment. FIG. 1 shows a front view of the transporting vehicle 20 of the embodiment in the traveling direction and a cross section of the traveling rail 2. The traveling rail 2 has an inverted U-shaped cross section as a whole, and its lower part extends right and left. The running rail 2 is formed by fixing the left and right rail halves 4, 6 by fitting, bolting, or the like, and providing a gap between them. A non-magnetic material such as an extruded aluminum material is used for the rail halves 4 and 6 of the traveling rail 2, and a primary coil 8 of a linear motor is accommodated in a gap between the left and right rail halves 4 and 6. A linear induction motor or the like is used as the linear motor, and the type of the linear motor itself is arbitrary.

Numeral 10 designates a duct having a concave section in the lower part of the running rail 2, which is fitted and attached to, for example, a ridge provided at the lower part of the left and right rail halves 4, 6, and is connected to the primary coil 8 with a wiring 12 , 12 and signal lines for controlling the linear motor. Further, the duct 10 may house a filter fan unit or the like for removing dust generated by the traveling of the carrier 20. Alternatively, the dust in the duct is removed by sucking the air in the duct to a filter fan unit provided at a stop station of the transport vehicle 20 or a filter fan unit provided to a processing device such as a semiconductor or a liquid crystal substrate in a clean room. You may do it. In these cases,
It is preferable to provide an opening in the duct 10 or the like to suck air under the traveling rail 2. 14 and 14 are running rails 2
Are used to guide the guide wheels 28 of the transport vehicle 20 on both side surfaces. Reference numeral 16 denotes a hanger for suspending the traveling rail 2 from a ceiling or the like of a clean room, and reference numerals 18 and 18 denote arms thereof. However, the traveling rail 2 may be laid on a floor surface such as a clean room.

The carrier 20 is constructed by connecting a carrier 32 to, for example, a pair of carriages 22 at a connecting portion 30, and the carrier 22 is rotatable with respect to the carrier 32. Reference numerals 24, 24 denote secondary conductors made of a magnetic material plate provided on the carriage 22. The secondary conductors are arranged so as to face the side surfaces 14, 14 of the traveling rail 2, and the primary coil 8.
And a magnetic circuit passing through the secondary conductors 24, 24 to increase the efficiency of the linear motor. Secondary conductors 24, 24
A guide wheel 28 is installed on the side of the traveling rail 2.
The carriage 22 is guided by 4 and 14. The guide wheels 28 are, for example, a total of eight wheels of up and down × front and back and left and right of the traveling rail 2 or two wheels at the center of the inside of the traveling route, and front and rear ×
A total of six wheels, four upper and lower wheels, are provided. Reference numeral 26 denotes a traveling wheel provided on the carriage 22, which travels above the traveling rail 2, and
Supports zero weight.

Reference numeral 32 denotes the carrier of the carrier 20; 30 is a connecting portion for rotatably connecting the carrier 32 and the carrier 22 with a bogie; and 34 is a load such as a cassette containing semiconductor wafers or liquid crystal substrates. It is. The transport vehicle 20 is used for transporting articles in a clean room, for example.

FIG. 2 is an exploded view of the traveling rail 2. The right half 4 and the left half 6 are made of, for example, an extruded material of aluminum or the like, and they are fitted together as shown in FIG. A running surface 40 for wheels is used. It is preferable that the running surface 40 is provided only on the upper part of the one half 4 or 6 so that the unevenness generated at the joint portion of the half 4 or 6 does not appear on the running surface 40. As shown in FIG. 2, the primary coil 8 is sandwiched between the right half 4 and the left half 6, and the primary coil 8 is attached to the left and right halves 4, 6 so as to sandwich the primary coil 8. Can be easily performed by fitting and bolting.

FIG. 3 shows the arrangement of the carriage 22 and the traveling rail 2 with the carrier 32 removed. The guide wheels 28 are guided by the side surfaces 14, 14 of the traveling rail 2,
For example, a total of eight wheels, or four wheels on the outside and two wheels on the inside are provided in a total of eight wheels in two stages of upper, lower, left, right, front, rear, right and left. The pair of trucks 22, 22 are connected to the carrier 32 by the connecting portions 30, 30, and one carrier carries, for example, up to two packages 34 thereon.

In the embodiment, the following effects can be obtained. 1) The primary coil 8 of the linear motor is accommodated in the gap between the inverted U-shaped portions of the rail 2 having the inverted U-shaped cross section. The traveling rail 2 is formed by connecting the left and right halves 4,6. For this reason,
The running rail 2 has a very simple sectional shape and is easy to manufacture. In addition, it is easy to dispose the primary coil 8 on the traveling rail 2. 2) Side surfaces 14, 1 on both sides of the running rail 2 having an inverted U-shaped cross section
4 can be used as a guide for the guide wheel 28 and the upper surface can be used as a running surface 40 for supporting the running wheel 26. 3) The wiring 12 etc. to the primary coil 8 are also connected to the lower duct 10
Can be easily accommodated. 4) The carrier 20 is driven by the propulsive force from the primary coil 8 and can run without power supply. Therefore, a simple cart can be used. 5) Since the secondary conductors 24, 24 are provided on both sides of the primary coil 8, the efficiency of the linear motor is high. Therefore, a plurality of articles can be conveyed at a relatively high speed at one time. 6) Dust is generated by the guide wheels 28, the running wheels 26 and the running rail 2.
Dust generation is smaller than in a case where a DC motor is mounted on a carrier, etc. 7) For these reasons, it is possible to obtain a linear carrier system in which the configuration of the traveling rail 2 is simple and compact.

[Brief description of the drawings]

FIG. 1 is a diagram showing a front surface of a carrier and a cross section of a traveling rail in a linear carrier system of an embodiment.

FIG. 2 is a perspective view showing a disassembled state of a rail in the embodiment.

FIG. 3 is a plan view showing a relationship between the carriage and the rail in a state where the carrier of the carrier is removed in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Running rail 4,6 Rail half part 8 Primary coil 10 Duct 12 Power supply line 14,14 Side surface 16 Hanger 18 Arm 20 Conveyor vehicle 22 Truck 24,24 Secondary conductor 26 Running wheel 28 Guide wheel 30 Connecting part 32 Carrier 34 Baggage 40 running surface 42 bearing

Claims (3)

[Claims] 1. A traveling rail having an inverted U-shaped cross section which supports a traveling wheel of a transport vehicle on an upper surface and guides a guide wheel of the transport vehicle on both sides, and an inverted U-shaped portion of the traveling rail. By accommodating the primary coil of the linear motor in the gap of
A linear carrier system that promotes the carrier. 2. The running rail, wherein a left half and a right half of a separate body are connected to each other, and the primary coil is accommodated in a gap between the left half and the right half. The linear carrier system according to claim 1, wherein a secondary conductor is provided on the carrier so as to face both side surfaces of the traveling rail. 3. The linear transport vehicle system according to claim 1, wherein a duct is provided on a lower surface of the traveling rail, and wiring to the primary coil is provided.