JPS62111827A - Transfer device - Google Patents

Abstract

PURPOSE:To run or stop a bogie stably and reliably by making the magnetic body portion of the bogie and nonmagnetic body portions is front and rear of it at least equal to the distance between centers of adjacent stators and the distance between rollers of one stator respectively. CONSTITUTION:A bogie 20 run by the magnetic suction force of a linear pulse motor has a magnetic body portion 21 made of a flat plate-shaped iron core and also has preferably nonconductive, nonmagnetic body portions 22 made of a flat plate-shaped synthetic resin body, and these surfaces are finished into one plane. The bogie can be stably run on one plane by making the distance L1 between centers of adjacent stators 18 at least equal to the whole length l1 of the bogie 20 and making the distance L2 between rollers 17 in front and rear of one stator 18 at least equal to the length l3 of the nonmagnetic body portion 22 and applying a magnetically stable state an an unstable state in sequence to electromagnets 12 arranged in line.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transfer device that can move over long distances and stop at any position, and is used for transporting and processing articles.

Conveyors such as belts, chains, and rollers are the most well-known and widely used means of transporting goods.

However, when items are placed on these conveyors and processed while moving at a predetermined position, if there are multiple processing positions, it is necessary to stop the conveyor at each location for the required amount of time, which requires special equipment or equipment. Requires human power. Also.

It is also common practice to stop an article at a predetermined position for a predetermined period of time and process it during that time, but when performing precise processing, not only is it troublesome to control the stop position, but there are also multiple stop positions. In such a case, operation control is extremely troublesome. Further, since the entire conveyor is driven and stopped to transfer and stop the articles, a large amount of power is required, and it is not possible to operate at high speeds because it cannot rapidly accelerate or decelerate.

Therefore, a conveyor is constructed by arranging two rows of rollers that rotate freely at the same time, and stators containing induction motor coils are placed at appropriate intervals below the rollers, and one carriage is equipped with a mover containing the magnetic material of the induction motor. A transfer device using a linear induction motor is introduced, for example, on pages 63 and 64 of ``Industrial Linear Motor'' (written by Yamada, first published by Kogyo Kenkyukai on August 1, 1981). This transfer device is capable of high-speed operation, rapid acceleration,
Not only is rapid deceleration possible, but also accurate stopping position control can be performed.

For example, it is possible to stop another cart while transporting one cart, and it is also suitable for transporting one cart while performing precise processing at multiple locations.

By the way, in order to improve the magnetic flux absorption of the mover in such a transfer device using a linear induction motor, to use the supplied power with high efficiency, and at the same time to make the cart run smoothly, it is necessary to accurately adjust the conveyor extender that acts as a track. It is necessary to arrange the rollers on one plane and to install the stator exactly a certain distance below the raceway surface, but it is extremely difficult to support a large number of rollers on the frame so that they can rotate freely on one exact plane. be.

Also, depending on the stopping position of one bogie, both its front and rear ends may be stopped in a cantilevered manner above the stator, and the entire bogie may be tilted or its ends may be curved due to the electromagnetic attraction force, and the leading edge may be distorted when it starts traveling. The roller spacing cannot be increased because there is a fear that the rollers may mesh with the stator surface or collide with the front roller, which further increases the above-mentioned difficulties.

The present invention solves the above-mentioned problems, allows the rollers and the stator to be arranged accurately on one plane, and allows the distance between the rollers to be wide (even if the distance between the rollers is large, it does not interfere with the carriage). The purpose is to provide a transport device that can be moved.

The transfer device according to the present invention includes a plurality of stators that are configured by assembling a set of coils and permanent magnets and rollers arranged before and after the coils in one frame, and are installed on one plane at regular intervals. and a cart that runs on the rollers and has a magnetic portion on the surface facing the stator and non-magnetic portions on the front and rear thereof, and the magnetic portion and the non-magnetic portion of the cart run on the rollers. Each of the body parts is formed to have a length at least equal to the distance between the centers of the adjacent stators and the distance between the rollers of one stator.

Example Embodiments of the present invention will be described based on the drawings.

In the embodiment, a linear pulse motor is used as the linear motor for generating thrust, and two electromagnets 12 and 12 formed by winding a coil 11 around the teeth and one flat permanent magnet 13 are mounted on a substrate. A frame body 16 consisting of 14 and side plates 15
A stator 18 is formed by fitting and fixing the roller 17 into the side plate 15 and rotatably supporting the roller 17 after the side plate 15 is attached.

The upper surfaces of the front and rear rollers J7 are only 2, for example, 50μ higher than the upper surfaces of the electromagnets 12 and 12 arranged between them (
It has become. Part 1. A plurality of stators 18 are fixed at regular intervals on a base 19 in the form of a long and narrow plate, and the upper surfaces of the rollers 17 are aligned on one plane.

The bogie 20, which runs by the electromagnetic attraction force of the linear pulse motor, has a flat iron core on the surface facing the stator 18.
It has a magnetic material portion 21, and has preferably non-conductive non-magnetic material portions 22, 22 made of a flat plate-shaped synthetic resin material on the front and rear thereof, and the surfaces of these portions are finished in one plane.

It goes without saying that the opposing surfaces of the tooth portion of the electromagnet 12 and the magnetic body portion 21 are formed in a tooth shape.

Here, the distance between the centers of adjacent stators 18 is L4. The distance between the rollers 17 before and after one stator 180 is Ll, the total length of the two carts 20 is ll, and the length of the magnetic part 21 is /2. When the length of the non-magnetic part is 13.

It is necessary that L1≦12 L2≦13, so that a pulse current is supplied to the coil 11 of the electromagnet 12, and the electromagnets 12 arranged in a row are in a magnetically stable state and an unstable state. It is possible to move the trolley 20 by sequentially applying the states.

In addition, the trolley 20 is always moved by the rollers 17 at at least three places in the front and back.
(Not only can it be moved on one plane, but also when either the front or rear edge of one cart 20 is positioned between the rollers 17 and 17 of one stator 18 and stopped, the electromagnetic attraction force No tilting or bending of the edges.

Further, in the embodiment, 2L2≦12.

11 =/z+213, so Ll-+-2Lz≦1
It can be seen that the trolley 20 is made so that the number is 1. From this relationship, the rollers 17.1 before and after one stator 180
By reducing the distance L2 between the stators 18, it is possible to increase the distance L1 between the centers of the stators 18 without increasing the overall length 11 of the truck 20 proportionally.

It should be noted that the present invention is not limited to a pulse motor, and the same can be applied to a linear motor composed of an induction motor.

FIG. 1 shows how a plurality of carts 20 are sequentially driven, and the leftmost cart 20 is moving to the right, but the two right-hand carts 20 and 20 are stopped at positions A and B, respectively. Required processing is performed on the loaded article M.

According to the present invention, since the stator is constructed as a unit that incorporates the coil, permanent magnet, and roller, the height relationship between the roller and the electromagnet can be made precisely constant, and the stator Using current machining technology, surfaces such as the base that serves as the base for installing and fixing the trolley, and the surfaces that contact the rollers of the trolley can be finished into highly accurate flat surfaces. By arranging the bogies so that they are aligned on top of each other, one bogie can run without vibrating.Furthermore, non-magnetic parts are provided before and after the magnetic part of one bogie, and these are placed between the centers of adjacent stators. Since the distance is at least the same as the distance between the rollers of one stator, not only can the two carts be moved while being stably supported by the rollers on one plane, but also the front and rear ends of the nine carts can be moved by the rollers of one stator. Even if the trolley stops between the rollers, it will tilt or curve due to electromagnetic attraction, and there is no need to worry about it engaging with the permanent magnet or colliding with the front roller when it starts running, so even if the distance between the rollers is large, the trolley remains stable. (It is possible to run and stop the vehicle reliably.)

[Brief explanation of drawings]

Fig. 1 is a schematic front view of an embodiment of the present invention, Fig. 2 is a front view of the stator, Fig. 3 is a sectional view taken along line X-X in Fig. 2, and Fig. 4 is a diagram showing the relationship between the stator and the truck. It is a figure explaining a relationship. 11... Coil, 13... Permanent magnet,
16...Frame body, 17...Roller, 18
・・・Stator, 20・Old truck, 21・・・・
...Magnetic material part, 22...Non-magnetic material part. ' ””, +5

Claims (1)

[Claims] A plurality of stators, which are constructed by assembling a set of coils and permanent magnets and rollers arranged before and after the coils in one frame, and are installed on one plane at regular intervals, and facing the stator. It consists of a cart that has a magnetic part on its surface and a non-magnetic part on the front and back thereof and runs on the rollers, and the magnetic part and the non-magnetic part of the cart are connected to the adjacent fixed parts. A transfer device characterized in that the length is at least equal to the distance between the centers of the children and the distance between the rollers of one stator.