JP2605594Y2 - Linear DC motor for transfer equipment - Google Patents

Description

[Detailed description of the invention] [Industrial applications]

[0001] The present invention relates to a linear DC motor for a transfer device.

[0002]

2. Description of the Related Art A transfer device using a movable magnet type linear DC motor as a power source has been developed. In particular, when a lightweight object is conveyed, the stator coil is not installed over the entire area of the conveyance path, but is installed only at a place where a proper thrust is required.

[0003]

However, since a substrate provided with a stator coil and an energization switching control circuit is installed inside a transport path composed of guide rails for guiding a traveling roller of a mover, When the stator coil is installed at a required location or the installation location is changed, there is a problem in that the transport path itself must be removed. The present invention has been made to solve the above problems, and provides a linear DC motor for a transfer device in which a plurality of stator coils can be easily attached to appropriate portions of a guide rail for guiding a mover. The purpose is to do so.

[0004]

As a specific means for achieving the above object, a horizontal portion having a long hole in the central longitudinal direction and symmetrically provided at both left and right end portions in the width direction of the horizontal portion are provided. A guide rail comprising a guide rail portion having a substantially rectangular cross section in which a half portion and a lower half portion are respectively inclined inward, a base portion, and a plurality of fixing members provided at the center of one surface of the base portion at right angles to the base portion. A resin molded coil having a substantially T-shaped cross section fixed to the horizontal part of the guide rail so that the coil part includes a coil part including a child coil, and the coil part penetrates through a long hole of the horizontal part of the guide rail and protrudes downward. And, having a plurality of rollers for rolling the upper half and the lower half of the guide rail portion of the guide rail on each of the left and right sides,
At the center, a movable element having a magnet row opposed to the coil section of the resin mold coil protruding from the horizontal section of the guide rail and being guided by the guide rail section of the guide rail, Each stator coil is incorporated in a base portion of the resin mold coil and generates a thrust in the same direction based on a relative position between each stator coil of the coil portion of the resin mold coil and the magnet row of the mover. And a power supply switching control circuit for switching a power supply direction to the transfer device.

[0005]

In the linear DC motor for a transport device having the above-described structure, the coil portion of the resin mold coil is made to penetrate the elongated portion formed in the central longitudinal direction of the horizontal portion of the guide rail so as to project downward. The base of the guide rail is fixed to the horizontal portion of the guide rail, and the upper and lower halves of the guide rail formed symmetrically at the right and left ends in the width direction of the horizontal portion of the guide rail are provided with rollers of the mover. The coil is rolled, and the coil portion is positioned between the magnet rows of the mover facing each other. Then, an energization switching control circuit incorporated in the base part of the resin mold coil, based on the relative position between each stator coil of the coil part and the magnet row of the mover,
The direction of power supply to each stator coil is switched so that thrust is generated in the same direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a state in which a resin mold coil 10 is installed at a required portion of a guide rail 1 forming a transport path. The guide rail 1 is an extruded product such as an aluminum material, and has a horizontal portion 3 having an elongated hole 2 formed in a central longitudinal direction, and upper and lower portions 5 and 5 at both left and right ends in the width direction of the horizontal portion 3. 6 are symmetrically provided with a guide rail portion 4 having a substantially rectangular cross section which is inclined inward at approximately 90 degrees.

The resin molded coil 10 has a substantially T-shaped cross section, and includes a horizontal base portion 11 and a coil portion 12 formed vertically at the center of the lower surface of the base portion 11. As shown in FIG. 2, the coil section 12 is formed by arranging three flat coils 13 at predetermined intervals and integrating them by insert resin molding. The base portion 11 is integrally formed with a guide wall portion 15 for mounting a case, which is provided upright at both ends in the width direction. A mounting groove 16 is formed on each of the opposing inner surfaces of the base of the guide wall portion 15. Base part 1
1, a circuit board 18 provided with an energization switching control circuit 17
Are mounted, and both ends of the circuit board 18 are attached to the mounting grooves 16.
It is attached to. The energization switching control circuit 17 includes the flat coils 13 and the magnets 28 of the magnet array 29 of the mover 22 described later.
The direction of energization to each of the flat coils 13 is switched so that thrust is generated in the same direction based on the relative position with respect to.

The upper portion of the resin molded coil 10 from the base portion 11 is housed by fitting a guide wall portion 15 into a rectangular cylindrical motor case 19 having an open lower surface. An opening in the longitudinal direction of the motor case 19 is the cover 2 to be screwed.
Blocked by 0. In addition, the resin mold coil 10
, Three Hall elements 21 as magnetic sensing elements are provided at predetermined intervals corresponding to the three flat coils 13. The electrical connection between the flat coil 13, the Hall element 21, and the energization switching control circuit 17 is performed by connecting the circuit board 18 to the base 11.
This is done when attaching to

In the resin molded coil 10 having the above structure, the coil portion 12 is made to penetrate the elongated hole 2 of the horizontal portion 3 of the guide rail 1 and protrude downward, and the motor case 19 is moved to the horizontal portion 3 of the guide rail 1. Place. Then, the motor case 19 and the base portion 11 of the resin molded coil 10 are fastened to the horizontal portion 3 by fixing screws (not shown). Since the elongated portion 2 is formed in the horizontal portion 3 of the guide rail 1 in the central longitudinal direction, the mounting position of the resin mold coil 10 can be adjusted in the elongated hole 2. Control signal line from
(Both not shown) and the power supply switching control circuit 17 are connected.

FIG. 3 is a cross-sectional view of a linear DC motor A for a transfer device using the guide rail 1 and the resin molded coil 10 having the above configuration. Linear DC motor A for transfer device
The movable member 22 with the carrier 21 is mounted on roller mounting portions 23 erected on both left and right sides, and an upper roller 24 that rolls the upper half 5 and the lower half 6 of the guide rail portion 4 of the guide rail 1. A plurality of lower rollers 25 are fixed.
A magnet mounting portion 26 erected at a predetermined interval is integrally formed at the center. A yoke 27 is fixed to each of the opposed inner surfaces of the magnet mounting portion 26. A plurality of magnets 28 magnetized in the thickness direction are mounted on the opposing inner surface of the yoke 27 with the polarity of the opposing magnet 28 and the polarity of the adjacent magnet 28 being different from each other. It is composed of columns. Further, a magnet 30 for detecting a magnetic pole corresponding to the Hall element 21 is arranged on one opposite inner surface of the magnet mounting portion 26 in accordance with the arrangement pitch of the magnets 28.

The mover 22 is inserted from the longitudinal end of the guide rail 1 and rolls the upper roller 24 on the upper half 5 of the guide rail portion 4.
The coil portion 12 of the resin mold coil 10 projecting downward from the long hole 2 of the horizontal portion 3 is positioned between the opposed inner surfaces of the magnet row 29.

An outline of the operation of the linear DC motor for a transport device having the above configuration will be described below. The relative position between each flat coil 13 and the magnet 28 of the magnet array 29 of the mover 22 is detected by the magnetic pole of the magnet 30 detected by the Hall element 21. The energization switching control circuit 17 switches the energization direction to each flat coil 13 so that thrust is generated in the same direction based on the relative position. As a result, the mover 22 and the carrier 21 attached to the mover 22 travel in a predetermined direction while being guided by the guide rail 1. When stopping the mover 22, the thrust acts in a direction opposite to the traveling direction,
The direction of current supply to the flat coil 11 is switched and controlled. The switching control of the energization direction is performed based on a control signal of a central control device (not shown).

As shown in FIG. 4 (a), when the transfer path is straight, the linear DC motor A for the transfer apparatus has resin mold coils 10 arranged at least on both ends of the guide rail 1 and a gap between the resin mold coils 10 is provided. The required number of resin mold coils 10 are arranged at predetermined intervals. Then, the guide rail 1 is installed horizontally. Also, as shown in FIG. 4 (b), the guide rail 1 is provided with a curved portion 1a and a curved portion 1b,
A circulating transport path can also be formed. In this case, a part of the circulating transport path is removed, the loading path 1c is connected to the part, and the movable element 22 is loaded. The required number of resin mold coils 10 are arranged at predetermined intervals, and the guide rails 1 are installed horizontally, as in the case of FIG. 4A.

The guide rail 1 has an elongated hole 2 in the central longitudinal direction.
, And the guide rails 4 are integrally formed at both left and right end portions in the width direction, so that the curved portions 1a and the bent portions 1b can be easily formed with low rigidity. Further, as shown in FIGS. 4A and 4B, not only a planar transport path but also a three-dimensional transport path can be configured.

FIG. 5 shows a resin molded coil 10a integrally formed by insert resin molding with three flat coils 13 and an aluminum plate 31 attached thereto. When the flat coil 11 is energized as described above, the corresponding mover 2
A thrust acts on the second magnet 28. However, the thrust in this case is weaker than when the aluminum plate 31 is not used, and the speed of the carrier 21 decreases. When no current is supplied, an eddy current is generated in the aluminum plate 31 due to the approach and passage of the magnet 28 of the mover 22, and a braking force corresponding to the traveling speed of the mover 22 acts. Therefore, the curved portion 1 of the circulating transport path shown in FIG.
a and the resin molded coil 10 before the curved portion 1b.
By installing a, the traveling speed of the mover 22 can be reduced to allow the mover 22 to pass through the curved portion 1a and the curved portion 1b.
In addition, by appropriately installing the resin mold coil 10a, it is possible to stop the movable element 22 by applying a braking force to the movable element 22 in an emergency such as a power outage where power supply control is impossible.

[0016]

According to the linear DC motor for a transfer device of the present invention, the guide rail has a simple structure including a horizontal portion and guide rail portions provided at both left and right ends of the horizontal portion. Bending of the resin mold coil is easy, and the resin molded coil is placed on the horizontal portion of the guide rail so that the coil portion protrudes downward through a long hole formed in the central longitudinal direction of the horizontal portion of the guide rail. Since the guide rail is fixed, the cross-sectional shape of the guide rail can be reduced, and the work of increasing the number of resin mold coils and changing the mounting position as required can be easily performed without removing the guide rail. There is an effect that the performance and maintainability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a resin mold coil is installed on a guide rail.

FIG. 2 is a front view of a resin mold coil.

FIG. 3 is a sectional view of a linear DC motor for a transfer device.

FIG. 4 is a plan view of a conveyance path showing an embodiment.

FIG. 5 is a front view showing another embodiment of the resin mold coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Guide rail 2 ... Long hole 3 ... Horizontal part 4 ... Guide rail part 5 ... Upper half 6 ... Lower half 10 ... Resin mold coil 11 ... Base part 12 ... Coil part 13 ... Flat coil (stator coil) 17 ... Electrification switching control circuit 22 ... Mover 24,25 ... Roller 29 ... Magnet row A ... Linear DC motor for transfer equipment

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 41/02-41/035 B60L 13/03

Claims (1)

(57) [Scope of request for utility model registration] A horizontal portion having an elongated hole in a central longitudinal direction;
Symmetrically provided at both left and right ends in the width direction of the horizontal portion,
Section and lower half are inwardly inclined.
A guide rail comprising a guide rail, a base, and a center perpendicular to the base at one surface of the base.
And a coil section including a plurality of stator coils
And the coil portion forms a long hole in the horizontal portion of the guide rail.
On the horizontal part of the guide rail so that it penetrates and projects downward
A resin mold coil having a substantially T-shaped cross section to be fixed and guide rail portions of the guide rails on the left and right sides, respectively.
Having multiple rollers that roll the upper half and lower half
In the center, projecting from the horizontal part of the guide rail
Opposingly arranged so as to sandwich the coil portion of the resin mold coil
With a magnet row placed on the guide rail of the guide rail
A movable element that is guided and moves , and is mounted on a base portion of the resin mold coil,
Each stator coil in the coil section of the resin mold coil and
Thrust in the same direction based on the relative position of the rotor and the magnet row
Switch the direction of current to each stator coil so that
Linear direct current motor transport device, characterized in that it comprises energizing the switching control circuit, the that.