KR100242538B1 - A slat conveyor propelled by linear synchronous motor - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Synchronous linear motor-driven slot conveyors used for conveying and sorting equipment

2. The technical problem to be solved by the invention

A non-metallic material such as a resin material can be used for the material for forming the slot, and a synchronous linear motor driven slot conveyor having high driving efficiency is provided.

3. Summary of Solution to Invention

In each of the plurality of slots 4 connected in a stepless manner and connected in an endless fashion to circulate along a predetermined driving path, a permanent magnet 9 attached to the outer surface of the slot to generate a magnetic pole is provided. By generating a moving magnetic field acting on the magnetic pole of the permanent magnet (9) in the vicinity of the ground side to fix the armature (6) to impart a driving force to each slot (4).

4. Important uses of the invention

Conveyor Device, Object Transfer Device

Description

Synchronous Linear Motor Driven Slot Conveyor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous linear motor driven slot conveyor for use in an article conveying device or a sorting device.

In recent years, as a conveyer or sorting apparatus for articles, a slot conveyor driven by an induction linear motor has been developed, for example, as described in Japanese Patent Application Laid-Open No. 7-61570. It is.

In the above-described induction type linear motor driven slot conveyor, secondary side conductors are formed by a plurality of slots connected at equal intervals or stepless shapes so as to circulate along a predetermined driving path, and the ground near the driving path. In the side position, the primary stator is fixed to provide a propulsive force against the slot serving as the secondary side conductor.

However, in the conventional induction type linear motor driven slot conveyor as described above, the material of the slot is made of aluminum or copper because it induces an overcurrent to the slot which becomes the secondary side conductor by the moving magnetic field generated by the primary side iron core. As described above, there is a problem that a slot formed of a resin having a low electrical resistance and being limited to a nonmagnetic metal and having a low noise and a low manufacturing cost cannot be used.

Particularly, when the goods conveyed from the upstream side on the slot are used in the slot conveyor of the sorting device having the structure that slides on the slot in a dispensing device such as a pusher and discharges it to the sorting chute on the slot side, Since it was a metal such as aluminum, the slip of the article was bad, and there was a fear of causing a problem in the sorting operation.

In addition, since each slot constitutes a part of the secondary side conductor, the pattern of overcurrent generated in the slot is limited by the shape of the slot, the overcurrent effective for generating the thrust force is reduced, and the electrical loss is increased, resulting in lower driving efficiency. There was a problem.

Therefore, the present invention solves the problems of the prior art as described above, and a non-metallic material such as a resin material can be used as a material for forming a slot, and a synchronous linear motor driven slot conveyor having high driving efficiency is also provided. The purpose is to provide.

1 is a side view showing a schematic structure of a synchronous linear motor driven slot conveyor of the present invention;

2 is a cross-sectional view showing a first embodiment of a synchronous linear motor driven slot conveyor of the present invention;

3 is a cross-sectional view showing a second embodiment of a synchronous linear motor driven slot conveyor of the present invention;

4 is a cross-sectional view showing a third embodiment of a synchronous linear motor driven slot conveyor of the present invention;

5 is a cross-sectional view showing a fourth embodiment of the synchronous linear motor driven slot conveyor of the present invention.

* Explanation of symbols for main parts of the drawings

1: slot conveyor 2, 3: guide wheel

4: slot 5: carrier surface

6, 7: armature 6A: iron core

6B: slot 8: hollow part

9, 9A, 9B: permanent magnet 10: yoke

For this purpose, a synchronous linear motor driven slot conveyor of the present invention, or a plurality of slots connected at equal intervals or stepless shape so as to circulate along a predetermined driving path, is attached to generate a magnetic pole on the outer surface of the slot. At the same time, the permanent magnet is installed, and a moving magnetic field is generated on the ground side near the driving path to act on the magnetic poles to fix the armature for imparting a driving force to each slot.

At that time, the polarity of the magnetic poles generated on the outer surface of each slot is arranged so as to be alternately inverted continuously in the traveling direction of the slot, and at the same time, the magnetization pitch between adjacent two poles of the armature in the moving magnetic field. It is preferable to make it almost equal to the extreme pitch between the two poles which generate | occur | produce on the iron core surface.

As each slot passes through the position in which the armature is installed, the moving magnetic field generated by the armature acts on the magnetic poles of the permanent magnets installed in the slot to impart thrust to the slot and the slot conveyor is circulated.

At that time, the polarities of the magnetic poles generated on the outer surface of each slot are arranged so as to alternate in succession alternately in the running direction of the slot, and magnetizing pitches between adjacent two poles are generated on the iron core surface of the armature in the moving magnetic field. When the pole pitches between the two poles are approximately equal, each of the moving magnetic poles generated on the iron core surface of the armature exerts a uniform propulsion force on all magnetic poles of all the slot outer surfaces passing through the iron core and maximizes the driving efficiency. You can do

EXAMPLE

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing. FIG. 1 is a side view showing a schematic structure common to each embodiment of a synchronous linear motor driven slot conveyor of the present invention, wherein the slot conveyor 1 includes a guide wheel 2 and a guide disposed at front and rear conveyance ends. A slot 4 is supported between the wheels 3 and connected in an endless fashion at a plurality of equal intervals so as to circulate the traveling path in the vertical plane.

The upper surface of the slot 4 which travels on the upper part of the traveling path constitutes the conveying surface 5 of the work W, and in each slot 4, magnetic poles are generated on the outer surface of the slot. Permanent magnets are installed. On the other hand, armatures 6 and 7 are provided on the ground side opposite to the slot 4 that travels the lower portion of the travel path. These armatures 6 and 7 have iron cores, such as silicon steel sheets, in which coils (not shown) are wound around each other, and a moving magnetic field is generated by passing electricity through the coils, alternately in the running direction of the slots 4. Magnetic poles of reversed polarity are generated on the iron core surface, and these magnetic poles are configured to move in the traveling direction of the slot 4.

2 shows a first embodiment of a synchronous linear motor driven slot conveyor of the present invention, wherein a hollow portion 8 is formed inside the slot 4, and a slot 8 in the hollow portion 8 is provided. On the outer surface of (4) is housed the permanent magnet 9 which is attached up and down to generate magnetic poles.

The material of the slot 4 may be a magnetic bundle of the permanent magnet 9 inside the slot 4 that can generate magnetic poles on the outer surface of the slot. It is available. In addition, when the magnetic pole of the permanent magnet 9 is exposed to the outer surface of the slot, it is also possible to use the magnetic material of the iron system for the slot 4.

As shown in the figure, in the upper part of the iron core 6A of the armature 6, a plurality of comb-shaped slots 6B arranged in the running direction of the slots 4 are formed, and in the slots 6B. The armature coil is wound in three phases. That is, in the drawing, any of a, b, and c, and the letter with-attached to the head corresponding to these letters, the armature of each phase wound between the slots 6B of every two of the core 6A. The current flowing through the coil is shown, and, for example, in the head of the letter a in relation to the current of one phase shown in the letter a, the current flowing in the opposite direction of the same phase is shown.

The pitch Pm between the two poles adjacent to the permanent magnets 9 provided in the slots 4 is generated by a moving magnetic field generated by the armature coil on the upper surface of the slot 6B of the iron core 6A. The moving magnetic pole is set to be approximately equal to the pole pitch Pc between two adjacent poles.

In the above-described configuration, when the three-phase alternating voltage is connected to the armature 6, the moving magnetic field is generated in the direction in which the slot 4 travels by the three-phase alternating current flowing through the armature coil. At this time, magnetic poles moving on the armature 6 occur at intervals corresponding to the magnetic poles of the permanent magnets 9 of the respective slots 4, and are equalized to the respective slots 4 passing over the armatures 6. One driving force is given.

Next, FIG. 3 shows a second embodiment of the present invention. In this embodiment, two permanent magnets 9A and 9B are provided in the hollow portion 8 of the slot 4. The two permanent magnets 9A and 9B are attached to the polarity opposite to each other, and are spaced between the centers of the two permanent magnets 9A and 9B in the slot 4 and before and after the running direction. The spacing between the centers of the rear permanent magnets 9B in the adjacent front slots 4 and the front permanent magnets 9A in the rear slots 4 is the same and is a magnetized pitch Pm.

On the other hand, the armature 6 has the same configuration as that of the first embodiment described above, and the moving magnetic field generated by the armature coil is generated on the upper surface of the slot 6B of the iron core 6A. The pole pitch Pc between two adjacent poles is set substantially equal to the magnetizing pitch Pm. Therefore, even in the case of this embodiment, an equal thrust force is given to each slot 4 passing over the armature 6 as in the above-described embodiment.

4 shows a third embodiment of the present invention, similarly to the embodiment shown in FIG. 3, two permanent magnets having reversed vertical polarity in the hollow portion 8 of the slot 4. 9A and 9B are arranged, but in this embodiment, the yoke 10 is arranged between the upper ends of the two permanent magnets 9A and 9B. In addition, about the structure of the armature 6, it is the same as that of each Example mentioned above. In this embodiment, since the upper ends of the permanent magnets 9A and 9B are connected by the yoke 10, the element force generated inside the permanent magnets 9A and 9B is reduced and the magnetic force is reduced. Over time, the decrease is suppressed.

5 shows a fourth embodiment of the present invention. In this embodiment, the front and rear widths of the slots 4 are narrow, and the width of the permanent magnets 9 accommodated in the hollow portion 8 is also narrow. Is used. The permanent magnets 9 are attached up and down in the same manner as the permanent magnets used in the above-described embodiments, but the polarities of the magnetic poles are alternated at the magnetizing pitch Pm for every two adjacent slots 4. Is reversed.

On the other hand, on the armature 6 side, the pole pitch Pc is set substantially the same as the magnetization pitch Pm in the same configuration as that of the above-described embodiments. In the case of this embodiment, since the front and rear widths of the slots 4 can be narrowed, the minimum bend radius between the slots 4 interconnected can be made small. Therefore, since a small diameter can be used for the guide wheels 2 and 3 at both ends of the slot conveyor 1 shown in FIG. 1, the height of the slot conveyor 1 can be made low.

In addition, although only one armature 6 is shown in FIG. 2 to FIG. 5 showing each of the above-described embodiments, as in the first diagram, two armatures 6 and 7 or a larger number of armatures are shown. The armature can be arranged along the path of the slot 4. In this case, since the driving efficiency of the slot conveyor 1 is maximized, the correspondence between the magnetic pole of N or S generated by the moving magnetic field of each armature and the magnetic pole of each permanent magnet 9 on the slot 4 side Each armature needs to be placed so that the relationship is in phase with all armatures.

In addition, in FIG. 1, although the armatures 6 and 7 are arrange | positioned close to the lower part (return side) of the runway of the slot 4 so that the armatures 6 and 7 may face the front side surface of the slot 4, the electric The chair shall be placed close to the upper part (carrying side) or the lower part of the slot's driving path to face the rear side of the slot, or to face the front and rear sides of the slot, You may arrange it.

In addition, the synchronous linear motor driven slot conveyor of the present invention has a structure that circulates in a horizontal plane such that the slots can be bent in a horizontal plane in addition to the structure circulated in the vertical plane shown in FIG. It can also be comprised as a spiral conveyor which circulates spirally in a direction.

As described above, according to the synchronous linear motor-driven slot conveyor of the present invention, the moving magnetic pole generated in the moving magnetic field generated by the armature applies the suction force and the repulsive force to the magnetic pole of the permanent magnet installed in the slot. As in the conventional induction linear motor driven slot conveyor, since there is no energy loss due to an overcurrent that is invalid for the propulsion force, which is caused by the pattern of the overcurrent being limited by the shape of the slot, the slot conveyor is driven. While improving the efficiency, it is easy to form the slot into a shape suitable for the work.

In addition, since the material of the slot is not limited to a metal such as aluminum having a low electrical resistance, it is possible to form a material having low noise and vibration during operation such as a synthetic resin and having a low manufacturing cost. When used for a slot conveyor of an apparatus, since the slot can be formed from highly active synthetic resin, the sorting apparatus which can operate smoothly and at high speed can be comprised easily.

In addition, the polarities of the magnetic poles generated on each slot surface are arranged so as to be alternately inverted continuously in the running direction of the slot, and a magnetism pitch between adjacent poles is generated on the iron core surface of the armature in the moving magnetic field. In the case where the pole pitch is almost the same, all the magnetic poles generated on the iron core surface of the armature can obtain almost uniform propulsion force against all the magnetic poles of all the slots passing through the iron core. Can be.

Claims (1)

On each of a plurality of slots connected in an endless fashion at equal intervals to circulate along a predetermined driving path, a permanent magnet is attached to the outer surface of the slot to generate a magnetic pole, and at the ground side near the driving path. A synchronous linear motor-driven slot conveyor, which fixes the armature that imparts thrust to each slot by generating a moving magnetic field acting on the magnetic poles, wherein the polarity of the magnetic poles generated on the outer surface of each slot is alternately shifted in the traveling direction of the slot. And a magnetization pitch between adjacent poles is substantially equal to the pole pitch between poles occurring on the iron core surface of the armature in the moving magnetic field.