JPS63110953A - Linear motor type track - Google Patents

Abstract

PURPOSE:To facilitate manufacture and management and reduce cost, by fixing stators with a fixing means coping with pertinent frequency among a plurality of the fixing means, according to the frequency of a power source exciting the stators. CONSTITUTION:A linear motor type track is composed of running rails 1 and a carrier 2a running on the rail 1, and as primary side cores provided with field generation coils between the running rails 1, stators 3a, 3b are fixed on a base plate 4a. The carrier 2a is composed of a container box 21, running wheels 22, a secondary side conductor plate 23a, slit plates 24, and a frame 25. In this case, spaces confronted with each other between the left and right stators 3a, 3b are set to be G1 when power frequency is of 50 Hz, and are set to be G2 when the power frequency is of 60 Hz, and the stators are screw- fixed on the base plate 4. The spaces G1, G2 are set so that the density of magnetic flux passing the secondary conductor plate 23a may be uniformed when the stators 3a, 3b are excited with respective frequencies, and running control is stabilized.

Description

[Detailed Description of the Invention] [Summary] A linear motor conveyance device in which a secondary conductor plate and a stator are connected so that the traveling magnetic flux density passing through the secondary conductor plate is equalized for power supplies of different frequencies. By providing a plurality of fixing means in which the gaps between opposing surfaces are set to different dimensions, it is possible to stabilize travel control.

(Industrial Application Field) The present invention relates to a linear motor transport device used in a cash transport system in financial institutions, etc., and particularly relates to a linear motor that can perform stable running control even when power supply frequencies differ. It is.

In recent years, linear motor conveyance devices have been adopted in automatic deposit/withdrawal systems that automatically withdraw and automatically receive cash handled at counters in financial institutions, etc., and are used to transport cash, checks, etc. at high speed to a dispensing position far from the counter. Methods for processing transactions are being put into practical use.

In addition, point-of-sale information management (1'oint) at department stores, etc.
Of 5ales: The price tag of a product using a POS) system, etc.

A linear motor conveyance device is used in which cash, credit cards, etc. are loaded onto a carrier and conveyed to a location away from the sales floor for transaction processing.

In such a conveyance device, if the power supply frequency varies depending on the installation area, the running control such as overrun when stopped becomes unstable, so a method for stabilizing it is desired.

[Conventional technology]

Figure 4 shows an example of a conveyance device using a linear motor.
A running rail 1 and a carrier 2 running on the running rail 1
It is composed of a.

Between the running rails 1, stators 3a and 3b as primary iron cores equipped with magnetic field generating coils (not shown) are fixedly arranged on the base plate 4 at predetermined intervals 1, for example, 1 m, between the running rails 1. Sensors S and -54 are also provided at the positions of the stators 3a and 3b.

The carrier 2a includes a storage box 21. which accommodates items such as cash and slips to be transported. Running wheels 22. Secondary conductor plate 23
a. Slit plate 24. and a frame 25.

As shown in FIG. 5, the stators 3a and 3b are fixed to the base plate 4, facing each other with a gap left and right on the left and right sides of the secondary heating body plate 23a. Further, the wheels of the carrier 2a are arranged in pairs to sandwich the running rail 1 from both sides 1, for example, from above and below, so as not to lift up.

Therefore, the traveling magnetic field generated by energizing the magnetic field generating coil and the secondary heating body plate 23 provided on the carrier 2a
The carrier 2a travels due to the thrust generated by the interaction with the eddy current induced in the carrier 2a.

Speed control when the carrier 2a is stopped is performed by turning off the excitation currents of the stators 3a and 3b while detecting the moving speed using the slit plate 24 and the sensors S1 to S4.

That is, the stator 3 of the carrier 2a moving in the direction of arrow A
The sensor S detects the entry into the positions a and 3b and its speed, applies reverse excitation, and further detects the decelerated speed with the sensor S2. Also, when moving in the direction of arrow B, sensor S4 detects the approach and speed.

Furthermore, a sensor S detects the decelerated speed. sensor S
,,S3 detects the presence of the carrier 2a at the position of the stakes 3a, 3b when the vehicle is stopped.

Furthermore, the frequency of the excitation power source for the stators 3a and 3b is 50Hz.
There are two versions available for this type: 1.2 and 60H2, with the same thrust. The reason is that when the stators 3a, 3b are excited by energization, as the frequency increases, the coil current decreases due to the inductance of the magnetic field generating coil.

Therefore, the magnetic flux density passing through the secondary conductor plate 23a decreases accordingly, making it impossible to control acceleration to the target speed.

The same applies to deceleration, and overruns occur especially when stopping. Acceleration is the weight of the payload.

It changes depending on fluctuations in the power supply voltage, and further changes depending on the frequency. Although it is possible to suppress the power supply voltage within a certain range, changes in the weight of the loaded items are unavoidable. Therefore, by removing the influence of frequency on acceleration,
In order to prevent changes in conveyance speed, stators 3a and 3b are provided that are compatible with power supplies of different frequencies.

[Problem that the invention seeks to solve]

In the conventional method described above, carrier speed control becomes unstable if the frequency of the power supply that energizes the magnetic field generating coil differs, so it is necessary to prepare two types of stator coil specifications: one for the frequency of 5011z and one for the frequency of 60Hz. There is a problem.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In the figure, 2 is the carrier, 3 is the stator, 23 is the secondary conductor plate, G is the gap, and 5 is the connection between the secondary conductor plate 23 and the stator 3 corresponding to the power supplies with different frequencies applied to the stator 3. These are a plurality of fixing means in which the gap G between opposing surfaces is set to different dimensions.

Therefore, by changing the fixing position of the fixing means 5, the magnetic flux density generated in the secondary conductor plate 23 is made equal for power supplies of different frequencies.

[Effect]

By fixing the stator 3 with the fixing means 5 corresponding to the corresponding frequency among the plurality of fixing means 5 according to the frequency of the power supply that excites the stator 3, a predetermined gap G is set and the secondary conductor plate 23 is fixed. Since the passing magnetic flux densities are equal, the conveying speed of the conveying body 2 can be stably controlled, there is no need to prepare stators 3 corresponding to power sources of different frequencies, and costs are improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. The same reference numerals indicate the same objects throughout the figures.

As shown in FIG. 2, the gaps between the left and right surfaces of the secondary conductor plate 23a and the opposing surfaces of the stators 3a and 3b are
It is fixed at 1a to 51h. Gaps G+ and Gz are set so that when the stators 3a and 3b are excited by power supplies of respective frequencies, the magnetic flux densities passing through the secondary conductor +123a are equal.

As shown in FIG. 3, there is a gap GI in the base plate 4a.
Corresponding to +62, threaded holes 50a to 50h and 60a to 60h are provided in parallel with each other at different widths L2, with positions shifted from each other.

In addition, as shown in FIG.
The mounting holes 31a to 31h are installed opposite to each of the holes 31a to 31h,
32a to 32h are provided.

Therefore, when the frequency of the power supply is 50Hz, the stators 3a and 3b are fixed in width to the base plate 4a, and 601 [
When z, by fixing the width dimension L2, the gap G,...
G.

is set.

In this way, by setting the gaps between the secondary conductor plate 23a and the stators 3a and 3b corresponding to power supplies of different frequencies, and making the magnetic flux density passing through the secondary conductor plate 23a equal, it is possible to use the same coil specifications. Travel control of the carrier 2a can be stabilized for power sources of different frequencies.

〔Effect of the invention〕

As explained above, according to the present invention, the same coil specifications can be used for power supplies of different frequencies, which facilitates manufacturing and management, and has the effect of reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of the present invention, Fig. 2 is a front view showing an embodiment according to the invention, Fig. 3 is an explanatory view of Fig. 2, Fig. 4 is a perspective view showing a conventional example, Fig. 5 The figure is an explanatory diagram of FIG. 4. In the figure, 1 is a running rail, 2 is a carrier, 2a is a carrier, 3, 3a + 3b is a stator, 4.4a is a base plate, 5 is a fixing means, 23.23a is a secondary side conductor plate, 31a to 31d, 32a to 32d are mounting holes, 51a to 51h are screws, 50a to 50h, 60a to 60h are mounting holes, G, G, G2 are gaps, L, L2 are mounting widths shows. Izoku Ken Denkō υ (, Bochi 62nd grade Irozuki Mata Reitatami familiar) P Ri ■ 1 fig.

Claims (1)

[Claims] A running rail, a carrier (2) having a secondary conductor plate (23) and running on the running rail, and a carrier disposed at predetermined intervals along the running rail. (2
) and a stator (3) having a primary iron core facing each other with a gap (G) in between;
), wherein the gap (G) between the opposing surfaces of the secondary conductor plate (23) and the stator (3) differs in size in response to power supplies with different frequencies applied to the electromagnetic coil. A linear motor conveyance device characterized by comprising a plurality of fixing means (5) set to .