JPH0474224B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electromagnetic brake device, and particularly to an electromagnetic brake device for a linear conveyance system.

BACKGROUND TECHNOLOGY In a linear conveyance system in which a linear motor carriage moves on a conveyance track in which linear motor drive units are arranged at regular intervals, a movable iron piece has conventionally been used as a brake device to stop the linear motor carriage at a predetermined position. Using an electromagnetic brake consisting of a part and an electromagnet part, the electromagnet part is attached to the position where the cart should be stopped on the transport track, and the movable iron part is attached to the bottom of the cart so that it can move downward and faces the electromagnet part on the transport track. The cart is made to stop at that position.

That is, as shown in FIG. 3, a linear motor drive unit 1 is provided on a transport track 2, and by sequentially driving the linear motor drive unit 1, the secondary conductor on the iron bottom plate of a linear motor transport cart 3 (hereinafter referred to as a cart) is When moving on the transport track 2 due to interaction with
That is, by detecting the position where the movable iron piece 4a attached to the trolley 3 faces the electromagnet part 4b of the conveyance track 2,
When the electromagnet section 4b is excited, the movable iron piece 4a of the truck 3 is attracted to the electromagnet section 4b, and the resulting braking action causes the truck 3 to stop at this position.

In this way, in the conventional electromagnetic brake device, the electromagnetic brake device can only operate when the movable iron piece 4a attached to the trolley 3 comes to a position facing the electromagnet portion 4b on the transport track 2.
Therefore, it can be used only for positioning the trolley 3, but it cannot be used as an emergency brake to stop the trolley 3 at a position other than this specific position in order to prevent any malfunction or danger during transportation work. Can not. Therefore, as an emergency brake, it is necessary to install a separate mechanical brake device or an additional electromagnetic brake device, which not only complicates the structure of the transportation linear system but also increases manufacturing costs. There is. Note that even when an additional electromagnetic brake device is provided, the position where the emergency electromagnetic brake device operates is similarly limited.

Problems to be solved by the invention Expanding the operable position range of the electromagnetic brake device, and making it possible to use one electromagnetic brake device regularly (positioning)
It is an object of the present invention to provide an electromagnetic brake device that can be used both as a brake and as an emergency brake device.

Measures to solve the problem On the conveyance track where the linear motor drive unit is placed,
A brake body equipped with an excitation coil and an attraction surface on the upper part is movably held in a direction perpendicular to the attraction surface, and by energizing the excitation coil of the brake body, the brake body is attached to a linear motor carrier that moves on a transportation track. Stops the linear motor truck by adhering to the magnetic bottom plate.

Function The brake body is held movable upward,
When the excitation coil is excited, as long as any part of the bottom of the linear motor carrier is in a position facing the brake body, it moves upward and attracts the bottom plate of the carrier to apply the brake.

Embodiment An electromagnetic brake device according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The brake body 6 has a structure similar to that of an electromagnet in a conventional electromagnetic brake device, and is equipped with an excitation coil 7, and has an attraction surface 8 at its upper part. The bottom of the brake body 6 is fixed to a brake body seat 9, and the brake body 6 is held movably upward on a mount 10 via the brake body seat 9. For this purpose, downwardly extending mounting beams 9a are provided on both sides of the brake body seat 9, and pins 9b are fixed to these beams so as to protrude outward.
The frame 10 has side walls 10a standing upright from both sides corresponding to the mounting beams 9a on both sides of the brake body seat 9.
A pin hole 1 is provided in the side wall 10a and extends in the vertical direction to support the pin 9b in an upwardly movable manner.
Set 0b. Therefore, the brake body 6 has the pin hole 1
It can be moved upward from the normal support position according to the vertical extent of 0b. Further, when the excitation coil 7 of the brake body 6 is not energized without requiring a brake action, the spring 11 is used to reliably hold the brake body 6 in the lower position.
One end is connected to the spring mounting seat 9b provided at the center of the brake body seat 9, and the other end is connected to the spring mounting seat 10c provided at the center of the pedestal 10, and the brake body 6 is pulled downward with a predetermined tension. It's tense. The installation situation of this electromagnetic brake device on the transport track is similar to the conventional case shown in FIG. 3. That is, as shown in FIG. 4, the brake body 6 of the present invention is placed at the position of the electromagnet portion 4b in FIG.
An electromagnetic brake device consisting of a frame 10 and a stand 10 is attached so that its suction surface 8 faces the bottom surface of the transport vehicle 3. In this case, the movable iron piece 4a in FIG.
is not necessary and will not be installed.

To explain the operation, the trolley 3 (see FIG. 3) is driven and moved by the excitation of the linear motor drive unit 1 on the conveyor track 2, and any part of the bottom of the trolley 3 is moved to any position facing the brake body 6. At this position, when the excitation coil 7 of the brake body 6 is excited (the power source etc. are not shown), the excitation coil 7
A closed magnetic circuit is formed that includes the electromagnetic brake magnetic material surrounding the brake body and the bottom surface of the transport vehicle 3, thereby generating a magnetic attraction force to the brake body 6, and the brake body 6 overcoming the downward tensile force of the spring 11. It moves upward and sticks to the bottom plate (iron plate) of the trolley 3.
Therefore, a braking force acts between the suction surface 8 of the brake body 6 and the bottom plate of the truck 3, and the truck 3 is stopped at that position. Further, in order to always stop the truck 3 at a fixed position for the purpose of positioning, the sensor 5 may detect a predetermined position of the truck 3 and the excitation coil 7 of the brake body 6 may be energized.

In the above embodiment, the linear motor drive unit is arranged on the conveyance track, but the structure and operation of the electromagnetic brake device also apply when the linear motor drive unit is mounted on the cart and the secondary side of the linear motor is installed on the conveyance track. The same applies to

Effects of the Invention As long as any part of the bottom of the linear motor carriage faces the brake body of the electromagnetic brake device, the carriage can be stopped at any position on the carriage, and therefore at any position around the carriage station. An emergency stop can be made at

Furthermore, since the range of positions in which the electromagnetic brake device can act is expanded in this way, one electromagnetic brake device can be used as a regular (positioning) brake and an emergency brake.

Moreover, unlike the conventional art, there is no need to provide a movable iron piece on the truck side, so the structure is simple as a brake device for a linear conveyance system.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the electromagnetic brake device according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a diagram showing the arrangement of a conventional electromagnetic brake device in a linear conveyance system, and FIG. FIG. 2 is a diagram showing the arrangement of the electromagnetic brake device of the present invention in a linear conveyance system. In the figure, 1... linear motor drive section, 2...
...Linear transport track, 3...Linear transport truck, 5...
...sensor, 6...brake body, 7...excitation coil, 8...adsorption surface, 9...brake body seat, 1
0... mount, 11... spring.

Claims (1)

[Scope of Claims] 1. An electromagnetic brake device used in a linear conveyance system in which a linear motor carriage moves on a conveyance track in which linear motor drive units are arranged at regular intervals, which comprises an excitation coil and is attracted to the upper part. The brake body includes a brake body having a surface, and a holding device that holds the brake body on the conveyance track so as to be movable in a direction perpendicular to the suction surface, and when the excitation coil is excited, the brake body moves upward. An electromagnetic brake device for a linear conveyance system that has the suction surface and adsorbs to a magnetic bottom plate of the linear motor conveyance vehicle to stop movement of the linear motor conveyance vehicle. 2. The electromagnetic brake device according to claim 1, wherein the holding device includes a pedestal for holding the brake body so as to be movable by a predetermined distance in a direction perpendicular to the suction surface, and the brake body and the pedestal. An electromagnetic brake device for a linear conveyance system comprising a spring member attached between the brake body and the brake body to constantly pull the brake body in the direction of the mount.