JPH04165903A - Trajectory unit of magnetic levitation transport device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a track unit that forms a running track for a magnetically levitated conveyance device.

(Prior Art) Magnetic levitation conveyance devices allow a conveyance vehicle to travel without contacting a travel track, and are therefore used for conveying articles such as IC chips that are susceptible to dust and vibration.

Conventionally, as shown in FIG. 8, the traveling track in such a magnetically levitated transport device is made up of two ferromagnetic rails 40, 40 each having a single-shaped cross section, which are directly attached to the ceiling 41 of a building. The transport vehicle 43 is levitated by the adsorption cam generated between the rail 40.40 and the levitation magnet 420 opposed thereto, and the transport vehicle 43 is placed along the rail 40.40 or driven by the thrust of the near motor. That's what I do.

[Problem to be solved by the invention]

However, with the conventional structure in which ferromagnetic rails are mounted directly on the ceiling as described above, when installing each rail in the vertical and horizontal directions, it is necessary to adjust the accuracy and parallelism between both rails, and when installing the running track, This method has the disadvantage that it is necessary to delicately move the position of the seal, and the work is extremely time-consuming.

In addition, many electric cables are installed on the running track to supply the necessary power to the linear motors and detectors that detect the position of the guided vehicle along the rail. In addition to being an obstacle to the movement of the conveyance vehicle, since the electrical cables are exposed to the outside, dust adhering to the electrical cables may fall and cause damage.
It has the disadvantage of contaminating the area around the running track.

In addition, recently, in order to completely prevent transport vehicle falling accidents,
A loading platform with the base and sides connected to each other is cantilevered above the base of the transport vehicle, and a running track is sandwiched between the loading platform and the base so that the falling of the transport vehicle is supported by the running track. However, in such a structure, it is necessary to support the running track sandwiched between the base and the cargo platform in a cantilevered state with respect to the ceiling or the like.

However, the ferromagnetic rail with a single-shaped cross section shown in Part 8,
When cantilever-supported on a support member suspended from a ceiling, etc., the weight of the running track increases, so the supporting member must be large and strong, and the thickness of the running track increases, making it difficult for the transport vehicle to The disadvantage is that the space between the base and the loading platform must become large, and the space for the transport device becomes large.

This invention was made in view of the above-mentioned drawbacks, and by directly attaching ferromagnetic rails to the ceiling, etc., unitizes them with fixed lengths, and combines them, it achieves light weight, high strength, and precision. The present invention aims to provide a track unit that can form a high running track.

[Failure to solve the problem]

In order to solve the above problems, the present invention provides a support frame that is formed in a fixed length and has a hollow interior, and has one or more reinforcing members provided in the hollow portion in the height direction, and a lower surface of the support frame. It consists of a plate-shaped ferromagnetic rail that is fixed to the support frame, and a housing for the linear motor and a housing for the electric cable are provided inside the support frame, and the electric cable stored inside is connected to the outside of the support frame. It has a structure with a connector.

=3- Note that in the above structure, it is desirable that the support frame be provided with a plurality of holes that are inserted into the upper and lower surfaces along the length direction of the support frame.

Further, the support frame may have a structure in which a protrusion is provided on one end surface and a socket hole into which the protrusion fits is provided on the other end surface.

[Effect]

A linear motor and an electric cable for supplying power to the linear motor and a position detector are housed inside the support frame, and in this state, the track units are connected in the longitudinal direction to form a running track. In addition, connectors of adjacent support frames are connected with cords to connect electrical cables within each track unit.

In the above structure, the track is formed by a hollow box-shaped support frame and a plate-shaped ferromagnetic rail, so the running track can be formed to be strong, lightweight, and compact. The support member can be simply formed.

In addition, by adjusting the position of the rail to the support frame with high precision in advance, it is possible to form a highly accurate running track by simply connecting the support frame during the installation work. can do.

Furthermore, since the electric cable is housed inside the support frame, it is possible to prevent dust from adhering to the electric cable and from generating dust from the electric cable.

〔Example〕

FIGS. 1 to 3 show a track unit according to an embodiment.

The track unit 1 consists of a support frame 2 formed to have a fixed length, and a pair of ferromagnetic rails 3.3 fixed to the lower surface of the support frame 2 by bolts 4.

The support frame 2 is formed into a hollow box shape, and its interior is partitioned into three parts by two reinforcing members 5.5 extending in the length direction. The central part of this section is
It becomes the motor storage part 6 into which the linear motor 8 is assembled,
The portions on both sides are cable storage portions 7 through which a plurality of electric cables 9 are inserted in the longitudinal direction.

A linear motor 8 is supported in the motor storage part 6 by fishing fittings 10 at predetermined intervals in the length direction of the support frame. It is exposed from

Further, the motor storage portion 6 is formed with a large number of through holes 11 that are inserted vertically along its length. This through hole 11 reduces the weight of the support frame 2, and
Its role is to allow the airflow blown from the ceiling of the conveyance path to pass through without disturbing it to suppress dust generation.
The presence of the support frame 2 has the effect of preventing turbulence in the airflow.

On the other hand, the cable storage section 7 stores electric cables 9 that are connected to the linear motor 8 and the position detector of the transport vehicle arranged along the running track. Near the end of is provided a connector 12.12 for connection to each electrical cable 9 housed inside. This connector 12.12 connects each support frame 2 to the connector of the adjacent support frame with the cord 1 connected in the longitudinal direction.
3, the electric cables 9 housed in each support frame are connected in succession.

Furthermore, a positioning protrusion 14 and a socket hole 15 into which the protrusion 14 fits without any gap are formed in the end portions on both sides of the support frame 2. By fitting the support frames 2 together as shown in FIG. 3, the track units can be positioned with high accuracy in both the vertical and horizontal directions.

The orbit unit 1 of the embodiment has the above structure,
4 to 7 show a conveying device in which the track unit 1 is supported in a cantilevered manner.

In FIG. 4, reference numeral 17 denotes an upper beam suspended and supported at predetermined intervals along the running line from the ceiling of the building, etc., and an L-shaped support member 18 attached to the upper beam 17 is The side surface of the track unit 1 is bolted through a buffer material 1S.

Each track unit 1 is connected in the length direction by fitting a socket hole 15 into a protrusion 14 provided on an end surface of the support frame 2, and forms a cantilevered running track 16 as a whole.

On the other hand, as shown in FIGS. 5 to 7, the transport vehicle 20 mounted on the traveling track 16 has a base 21 equipped with a levitation magnet, etc., and a loading platform 22 on which the transported goods are loaded. They are connected by connecting rods 23, 23, and travel floatingly between the base 21 and the loading platform 22, sandwiching the running track 16 in the vertical direction while being floatingly supported by the rails 3, 3.

Further, a steering member 24.24 is provided at the front and rear of the upper surface of the base 21 via a vertical axis 25 and a horizontal axis 26, and on both sides of this steering member 24.24,
Levitation magnet 27 facing the ferromagnetic rail 3.3.
27.27.27 is installed. The levitation magnet 27 is formed of an electromagnet or the like, and generates an attractive force between the rails 3.3 to levitate the conveyance vehicle 20 without contacting the rails.

In addition, at both ends of each steering member 24.24, there is provided a guide roller 28, which faces the rail 3.3 of the running track 16, in the vicinity of the levitation magnet 27, and which is oriented perpendicularly to the guide roller 28. Guide rollers 29 are attached to each.

Further, a transport vehicle 20 is provided on the traveling track 16 in the length direction thereof.
A cover 30 is provided to surround both sides and the bottom of the guide roller 29.
Opposing ribs 31.31 are formed below. In the above structure, a required gap is provided between the guide roller 28 and the rail 3.3 and between the guide roller 29 and the rib 31 when the carrier 20 is suspended and supported on the traveling track 16. If the floating gap between the rail 3 and the floating magnet 27 changes more than the specified device while traveling, the guide rollers 28.29 will move against the rail 3.3 or the rib 31.
The floating gap is always maintained within a controllable range.

Note that a traveling track 16 is provided on the upper surface of the base 21 of the transport vehicle 20.
A reaction plate 32 as a propulsion means is installed opposite the near motor 8, and the base 21
A gap sensor 33 is attached to the center of the rail 3.3 for detecting a floating gap with respect to the rail 3.3.

In the above structure, the transport vehicle 20 is supported by the rails 3.3 in a non-contact state, and is prevented from being attracted or falling by being guided by the guide rollers 28, 29. In this case, the running track 16
The weight of the conveyance vehicle 20 and the conveyed object A are added at the same time, but since the support frame 2 is formed into a hollow box shape inside, it exhibits great support strength while being lightweight. be able to. Therefore, the thickness of the upper beam and the support member 18 that support the running track can be made small, and the support space can be made compact.

In addition, since the ferromagnetic rail 3.3 is attached to the support frame 2 to form a unit, by attaching the rail to the support frame with high accuracy in advance, it is only necessary to connect each support frame 2 when connecting the track units 1. Rail 3.3 can be laid with high precision.

Note that the method for positioning each track unit 1 is to
4 and the socket hole 15, fitting between a pin and a hole, or a socket member separate from the track unit may be used.

〔Effect of the invention〕

As described above, the present invention forms a track unit with a support frame that is hollow inside and is provided with reinforcing material in the height direction and a plate-shaped ferromagnetic rail, and connects these track units to form a running track. Since the structure is formed in this way, the running track can be made high in strength, lightweight, and compact. Therefore, when the traveling track is supported in a cantilever manner, the support member can be formed into a small and thin shape, which has the effect of reducing the transport space.

In addition, since the plate-shaped ferromagnetic rail is integrally connected to the support frame, a highly accurate running track can be formed by connecting the support frame in the length direction, making it easier to adjust the rail position at the installation site. It has the advantage of being omissible.

Furthermore, since the power cable is housed inside the support frame, it is possible to prevent dust from adhering to the cable, thereby preventing contamination around the running track.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the track unit of the embodiment, Fig. 2 is a partially cutaway front view of the same as above, Fig. 3 is a longitudinal side view of the same as above, and Fig. 4 shows the supported state of the track unit. FIG. 5 is a perspective view of the carrier, FIG. 6 is a longitudinal plane opening showing the running track and the supporting state of the carrier, FIG. 7 is a longitudinal front view of the same, and FIG. 8 is a conventional example. It is a partially longitudinal front view shown. 1...Track unit, 2...Support frame, 3...Ferromagnetic rail, 5...Reinforcement material, 6...Motor storage Part, 7...Cable storage part, 8...Linear motor, 9...
...Electric cable, 11...Through hole,
12...Connector, 16...Travel track, 18...Support member, 20...Transportation vehicle, 21...Base, 22...・・・・・・
Loading platform, 27... Magnet for levitation, 30... Cover.し＼ ＼ q） し＼ / ρ ♀ Ｃ） ■ ■ Ｃ

Claims (3)

[Claims] (1) A support frame with a fixed length and a hollow interior, and one or more reinforcing members provided in the hollow part in the height direction, and a plate-shaped ferromagnetic material fixed to the lower surface of the support frame. A magnetic levitation conveyance device consisting of a rail, a linear motor storage part and an electric cable storage part provided inside the support frame, and a connector connected to the electric cable stored inside the support frame provided on the outer surface of the support frame. orbital unit. (2) The track unit of the magnetic levitation conveyance device according to claim (1), wherein the support frame is provided with a plurality of holes extending through the upper and lower surfaces along the length direction of the support frame. (3) Claim (1) or (3) wherein a protrusion is provided on one end surface of the support frame, and a socket hole into which the protrusion fits is provided on the other end surface.
2) The orbit unit of the magnetic levitation transport device according to item 2).