JPS61225401A - Conveyor apparatus - 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 [Technical Field of the Invention] The present invention relates to a transport device in which a plurality of thrust imparting means are arranged in a distributed manner along a track to run a transported object.

[Technical background of the invention and its problems] An example of this type of device is a conveyance system using a linear induction motor. In this conveyance system, a reaction plate is installed on the conveyed object traveling along a track, and a plurality of stators are spaced apart along this track, and a magnetic flux that changes over time is applied to the reaction plate passing through the stator. This change causes the reaction plate to generate a constant propulsive force or reverse propulsive force to move and stop the conveyed object.

By the way, in this type of conveyance system, when a plurality of conveyed objects are run along the track, if a − conveyed object is stopped on one of the stators, this conveyed object is This has the disadvantage that it is not possible to run a plurality of objects because other objects cannot be moved unless the body is evacuated from the track. .

In addition, if it has been extremely difficult to evacuate the transported object from the track, or if the structure is such that the engagement between the wheels of the transported object and the track cannot be released midway through the track, , it has become impossible to evacuate the transported object from the orbit.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a transport device that can easily temporarily evacuate a transported object from a transport track midway through the track. It is something.

[Summary of the Invention] To achieve the above object, the eAS of the present invention provides a transport device that transports and travels a conveyed object by distributing a plurality of thrust imparting means along a travel track. The present invention is characterized by comprising a plurality of movable tracks provided at a predetermined distance from each other, and a drive means for separating and connecting any one of the movable tracks to the running track.

[Embodiment 1 of the Invention Hereinafter, an embodiment of the present invention will be described with reference to the drawings. This embodiment relates to a conveyance device using a linear induction motor.

Fig. 1 is a schematic perspective view of the object to be transported and the track, Fig. 2 is a longitudinal cross-sectional view of the conveyance path of the object to be transported, Fig. 3 is a cross-sectional view showing the section B-8 in Fig. 2, and Fig. 4 5 is an explanatory diagram of the operating principle of the linear induction motor, FIG. 5 is a schematic explanatory diagram of the track, and FIG. 6 is a sectional view of the movable track.

In FIGS. 1 and 2, a conveyed object 1 has a reaction plate 3 erected at the lower end of a casing 2 in which articles can be loaded. The reaction plate 3 is a metal plate made of copper, aluminum, etc., and is adapted to be provided with propulsive force or reverse propulsive force based on magnetic flux generated from a stator 9, which will be described later.

Further, the conveyance path 6 for the conveyed object 1 is constructed by arranging longitudinal plate-shaped tracks 7 in parallel and spaced apart. and,
Two wheels 5A, 5B are provided on both sides of the casing 2 of the conveyed object 1, respectively, and these wheels 5A, 5B are in rolling contact with the upper surface of the track 7. Further, a mounting plate 4.4 is formed extending below both widthwise ends of the housing 2, and wheels 5C and 5D are mounted on this mounting plate 4.4 at positions spaced apart below the wheels 5A and 5B. They are respectively attached so as to be in rolling contact with the lower surface of the track 7. still,
The distance between the outer peripheral surfaces of the wheels 5A and 5G and the wheel 5B,
The distance between the outer circumferential surfaces of 5D is slightly longer than the thickness of the track 7, respectively. With such a configuration, the conveyed object 1 can freely travel along the conveyance path 6 in the direction of the arrow shown in FIG. Therefore, even when turning a curve at high speed, the vehicle will not jump out of this trajectory 7.

Further, a linear induction motor 8 is provided below the conveyance path 6. This linear induction motor 8 includes a reaction plate 3 as a mover attached to the housing 1.
and a pair of stators 9, 9, which are stators, and are arranged opposite to each other with the conveying path of the reaction plate 3 interposed therebetween. As shown in FIGS. 3 and 4(a), the stators 9, 9 are made by laminating electric iron plates with teeth and grooves, and coils are wound around the eight grooves. Note that a gap of a constant distance 11Q is provided between the reaction plate 3 and the stator 9.

Here, the principle of generation of propulsive force or reverse propulsive force by the linear induction motor will be briefly explained with reference to FIGS. 4(a) and 4(b). FIG. 4(a) is a schematic perspective view of a planar one-sided type linear induction motor as an example, and FIG. 4(b) is a characteristic diagram showing the relationship between magnetic flux bO and thin current jr. When a two-phase or three-phase alternating current is passed through the coil of the stator 9, the instantaneous value bo (T) of the magnetic flux density at the gap is expressed as bg = B g cos (ω[ -πχ/τ), where the peak value is Bg. Here, ω=2πf: Angular frequency of power supply (rad/s) f:
Frequency (Hz) t: Time (S) χ: Distance on the Nischi surface (m) τ: Pole pitch (W). The ball pitch τ is the length of a half period of the magnetic flux density bg. Furthermore, since the magnetic flux generated from the stator 9 is alternating current, it generates an eddy current in the reaction plate 3, which is a movable element, according to Lenz's law. Figure 4 (
a) The * mark and the X mark shown in the cross section of the illustrated reaction plate 3 represent the direction in which eddy current flows and its magnitude. The instantaneous value jr of this eddy current is jr-Jr 5 inches (ωt-yrz/τ-ψ), where ψ is a phase difference based on the impedance of the reaction plate 3, where Jr is the peak value of the eddy current. Since the magnetic flux density bg of the gap forms a moving magnetic field, the product of this magnetic flux density bg and the eddy current jr generates a continuous thrust F according to Fleming's left hand rule.

Although this thrust is generated in either the left or right direction in FIG. 4(a), bgxjr in the left region in FIG. 4(b) is larger than the right region, so the reaction plate 3 moves to the left. become. In addition, in order to apply a reverse propulsion force to this reaction plate 3, the stator 9
All you have to do is to flow an alternating current of opposite phase through the coil. As a method of varying the magnitude of this propulsive force F, methods such as varying the alternating current frequency f or varying the alternating current amplitude are adopted.

Next, the conveyed object 1 to which the propulsive force is applied as described above
The transport path 6 will be explained with reference to FIG. The conveyance path 6 has stators 9A to 9F arranged at predetermined intervals along the conveyance path 6 as shown in FIG. It is designed to provide propulsion. Therefore, adjacent stators are connected by a fixed track 70.7C. Furthermore, first movable tracks 7A and 7A connected to the fixed track 7C are arranged on both sides of each of the stators 9A to 9F.

A drive mechanism 10 is provided for retracting or connecting and driving the first movable tracks 7A, 7A.

Here, details of the movable track and drive mechanism 10 will be explained with reference to FIG. 6. In FIG. 6, the drive mechanism 10
consists of pulleys 11 and 11 arranged vertically opposite each other on both sides of the stator 9, and a belt 12 stretched endlessly around the pulleys 11 and 11. One of the pulleys 11 is reversibly rotated to move the belt 12 up and down. Said first movable track 7A, 7
A is fixed to the belt 12.12 approximately at the center between the pulleys 11, 11 arranged above and below.

Both ends of the first movable tracks 7A, 7A held in this position are connected in a straight line to the fixed track 7C. Further, below the first movable tracks 7A, 7A, there is a second movable track 7B.

7B is fixedly held on the belt 12. This second
The movable tracks 7B, 7B are driven by the belt 12, as shown by the dashed line in FIG.
When A and the conveyed object 1 are retracted above the stay 99, the first movable tracks 7A, 7A are replaced by the fixed tracks 7G, 7G connected in a straight line. There is. Note that, for example, on one of the first movable tracks 7A, 7A, the wheels 5 of the transported object 1 are attached to the first movable track 7A.
A locking mechanism 13 for pressing A is provided.

This locking mechanism 13 is, for example, a solenoid, and is configured to move the drive piece 13A and lock the wheel 5A when energized.

The operation of the device configured as above will be explained.

To apply a propulsive force to the conveyed object 1, as described above, a two-phase or three-phase alternating current is passed through the coil of the stator 9, a magnetic flux is generated from the stator 9, and a vortex is applied to the reaction plate 3 based on this magnetic flux. This is done by generating an electric current, and the product of this magnetic flux and the thin current generates a continuous propulsive force F according to Fleming's left-hand rule. When the propulsion force is applied to the conveyed object 1 in this way, the wheels 5A to 5D attached to the housing 2 are guided by the plate-shaped track 7, and the conveyed object 1 is moved along the conveyance path 6 by inertia. The vehicle will run due to the following.

Here, when the conveyed object 1 is started from the stator 9Δ and stopped at the stator 9E position, in order to convey the next conveyed object 1 from the stator 9A to the stator 9F position, it must be stopped at the stator 9E. The conveyed object 1 that is present therein becomes an obstacle.

Therefore, in this embodiment, the conveyed object 1 is driven to retreat from the conveyance track at the position of the stator 9E. That is, since the conveyed object 1 is stopped on the movable tracks 7A, 7A, the belt 12 is rotated by the drive of the pulley 11, and the first movable track 7 fixed to the belt 12 is rotated.
A and 7A are retracted upward together with the conveyed object 1. By the above-described operation, the first movable tracks 7A, 7A and the transported object 1 can be retracted to the position shown by the dashed line in FIG. 6, and can be completely removed from the transport track. At this time, by operating the locking mechanism 13, the rotation of the wheels 5A of the transported object 1 is locked, and the first movable track 7
It is possible to prevent the conveyed object 1 from moving on A and 7A.

Furthermore, in this embodiment, at the same time as the retracting drive of the movable tracks 7A, 7A, the connecting drive of the second movable tracks 78, 78 is started, and the second movable track 7A, 7A is replaced by the second movable track 7A, 7A. 78.78 are connected to the fixed track 70.7C. Therefore, after the first conveyed object 1 is retracted, the second conveyed object 1 can be transported further ahead.

Furthermore, by rotating the pulley 11 in the opposite direction, the second
The movable orbits 7B, 7B are retracted below the stator 9, and the first movable orbits 7Δ, 7A are moved to the fixed orbits 70.7. C, and the evacuated object 1 to be transported can be easily returned to the transport track. Incidentally, since the reaction plate 3 of the returned object 1 is inserted into the groove of the stator 9, the subsequent movement can be easily performed.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. It goes without saying that the present invention is not limited to transporting and driving the transported object 1 using a linear induction motor method, and that various other driving methods can be applied, and the shape of the track is not limited to that of the embodiment described above, but may be U-shaped. Any material that can guide the conveyed object 1, such as a shape or a machining mold, may be used. Furthermore, the present invention aims at easily retracting the conveyed object mid-trajectory, and it does not matter how to compensate for the gap created between the fixed orbits by retracting the movable orbit. It is most preferable to use the same drive source to supplement the other movable tracks as in the above embodiment, but it is also possible to use separate drive sources, or even to manually drive each movable track. If the frequency of evacuation of the conveyed object is low, the equipment cost may be reduced as described above. Note that the movable orbit may be evacuated in any direction as long as the thrust applying means does not become an obstacle, and the movable orbit may be moved in parallel within the same plane as the orbit.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a transport device that can easily temporarily evacuate a transported object from the transport track midway through the track.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the object to be transported and the track, Fig. 2 is a longitudinal cross-sectional view of the conveyance path for the object to be transported, Fig. 3 is a cross-sectional view taken along the line B-B shown in Fig. 2, and Fig. 4 (a). (b) is an explanatory diagram of the operating principle of the linear induction motor, FIG. 5 is a schematic explanatory diagram of the track, and FIG. 6 is a sectional view of the movable track. 1... Object to be transported, 7A... First movable track, 7B
...Second movable orbit, 7C...Fixed orbit, 9A~
9F... Thrust imparting means, 13... Lock am. Figure 2 Figure 4 r (b) Claim 9 of the specification Each section of the detailed description of the invention and the drawings ``Furthermore, on both sides of the conveyed object 1, there are shown the lines shown in Figure 1, respectively. Wheels 15A and 15B are arranged at predetermined intervals, two on one side and four on both sides, projecting laterally from the conveyed object 1.
The outer circumferences of A and 15B are the upright portions 7E and 7E of the track 7, respectively.
It is designed to touch the wall surface of 7E or reach the vicinity of the wall surface. (8) In the 15th line of page 6 of the specification, the phrase ``because it is designed to be pinched'' has been replaced with ``because it is designed to be pinched, and each of the wheels 1
5A and 15B are the upright portions 7E and 7E of the track 7, respectively.
``Because I'm making you face the situation,'' he corrected. (9) In the 11th line of page 10 of the specification, the phrase [the belt in the center] is corrected to read "the belt in the center." (10) In the drawings, as shown in Figure 1, Figure 2, Figure 3, Figure 5 and Figure 6 are attached, respectively. correct. Scope of Claims (1) A conveying device for conveying and running a conveyed object by distributing a plurality of thrust imparting means along a traveling track l, including a plurality of movable tracks provided in a part of the traveling track, and a movable 1. A conveying device comprising a driving means for separating and connecting any one of the tracks to a running track. July 3, 1986 during procedural amendment

Claims (10)

[Claims] (1) In a conveying device that transports and travels a conveyed object by distributing a plurality of thrust imparting means along a running track, a plurality of movable tracks are provided at a predetermined distance in a part of the running track, and the movable track A conveyance device comprising a driving means for separating and connecting any of the tracks to the running track. (2) The movable track is connected to the traveling track at a position that supports the conveyed object stopped within a range where thrust can be applied by the thrust applying means. conveyance device. (3) The conveyance device according to claim 1, wherein the movable track is moved vertically by a driving means to separate from and connect to the running track. (4) The transport device according to claim 1, wherein the movable tracks are provided at predetermined intervals in the moving direction. (5) The conveyance device according to claim 1, wherein when the movable track is evacuated, the other movable track is connected to the running track. (6) The conveyance device according to claim 1, wherein the movable track is connected to the running track, and is driven and removed from the running track when the transported object is on the movable track. . (7) The movable track includes the first
2. The conveying device according to claim 1, comprising a movable track and a second movable track connected to the travel track in place of the first movable track. (8) The conveyance device according to claim 7, wherein the retracting drive of the first movable track and the connecting drive of the second movable track are performed by the same drive source. (9) The conveyance device according to claim 8, wherein the drive source connects and drives the first movable track and retracts the second movable track by reverse rotation drive. (10) The conveyance device according to any one of claims 1 to 9, wherein the movable track is provided with a fixing means for fixing the transported object on the movable track.