JP2576707B2 - Linear motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor used for opening and closing a curtain and transporting articles.

[0002]

2. Description of the Related Art Conventionally, the following linear motor having a stator block and a mover block is generally used as this type of linear motor.

The stator block is provided with a cylindrical guide rail, a plate-shaped permanent magnet magnetized in the thickness direction so that the lengthwise direction is alternately and alternately at different intervals, and a conductive portion for positive and negative voltages. And a power supply substrate, the permanent magnet and the power supply substrate being fixed along the longitudinal direction of the inner wall of the guide rail.

The mover block has a substantially U-shaped iron core in which coils are wound on opposing pieces in opposite directions, respectively.
An electromagnet device in which three electromagnets interposed in the thickness direction of the permanent magnet between opposing pieces of the iron core are integrally arranged in a single row body made of a rigid material, a brush connected to a coil, Is formed.

When the brush slides on the power supply substrate and positive and negative voltages are alternately applied to the coil and the mover block moves in the longitudinal direction of the cylindrical guide rail, the curtain connected to the mover block is moved. It is designed to open and close and to convey articles.

In order to increase the carrying force, the length of the electromagnet device constituting the mover block is lengthened, and the number of electromagnets arranged in the electromagnet device is increased to an integral multiple of three. become.

[0007]

In the above-described conventional linear motor, the electromagnet device of the mover block is a three-pole motor.
Since the plurality of electromagnets are integrally arranged in a single row body made of a rigid material, a relatively large curved portion having a degree of curvature is provided in a portion of the guide rail serving as a transport path in the longitudinal direction. In this case, since the row of rigid members does not bend along the curved portion, the mover block may not move smoothly on the curved portion.

In particular, when a plurality of the mover blocks are connected in the moving direction in order to increase the conveying force, it is necessary to lengthen the row members by the number of the mover blocks. As a result, the curve cannot be moved more smoothly than in the case.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a guide rail having a relatively large curved portion having a degree of curvature in a part of the length of the guide rail. To provide a linear motor that allows the mover block to move smoothly.

[0010]

In order to solve the above-mentioned problems, a linear motor according to the present invention is provided with a cylindrical guide rail and a magnetized magnet in a thickness direction such that the magnetic poles are alternately poled at regular intervals. A flat plate-shaped permanent magnet, and a power supply board provided with a conductive portion for positive and negative voltages, and a stator block having the permanent magnet and the power supply board fixed along the longitudinal direction of the inner wall of the guide rail, An electromagnet in which a plurality of electromagnets having a substantially U-shaped iron core in which coils are wound on opposite pieces in opposite directions to each other and having permanent magnets interposed between the opposite pieces of the iron core in the thickness direction of the permanent magnet are provided. Device, and a brush connected to the coil, and a mover block having a brush. The brush slides on the power supply board, and positive and negative voltages are alternately applied to the coil. In a linear motor that moves in the longitudinal direction, A connecting member formed of an elastic material having a piece and a horizontal piece extending on both sides of the vertical piece is attached, and the plurality of electromagnets arranged in a row form a vertical piece between respective opposing pieces. A horizontal piece is inserted between electromagnets adjacent to each other and connected by a connecting member.

Further, the connecting member may be arranged so as to straddle adjacent to the plurality of movable element blocks arranged in the moving direction.

[0012]

According to the linear motor of the present invention, a connecting member formed of an elastic material and having a vertical piece and a horizontal piece extending on both sides of the vertical piece is attached, thereby forming a mover block. Each of the U-shaped electromagnets arranged in a row, the vertical piece is inserted between the opposing pieces, and the horizontal piece is inserted between the adjacent electromagnets and connected by a connecting member, so that the guide rails Even when there is a relatively large curved portion having a degree of curvature in a part of the longitudinal direction, the movable member block can move smoothly because the connecting member travels along the curved portion while bending.

[0013]

1 to 6 show a first embodiment of the present invention. In the description of the present embodiment, first, the basic configuration and operation of a linear motor to which the present invention is applied will be described with reference to FIGS.

This linear motor includes a stator block A and a mover block B, and is configured as follows.

First, the stator block A is provided with a guide rail.
1, a permanent magnet 2, and a power supply board 3.

The guide rail 1 is made of a metal material such as aluminum and has both ends open, and as shown in FIG. 4, a guide groove 1a is provided in the center of the lower side to form a substantially rectangular tubular section.
Further, the inside of the rectangle has a two-stage space vertically divided by a partition 1b having an opening in a part.

The permanent magnet 2 is formed in a flat plate shape, and one end surface of the plate thickness is fixed to the center of the inner wall on the upper side of the guide rail 1 along the longitudinal direction. Then, as shown in FIG. 4, it is magnetized in the plate thickness direction so that the longitudinal direction has alternate poles at regular intervals. Here, the length of one set of magnet pieces including the N pole and the S pole in the longitudinal direction is L.

The power supply substrate 3 is provided on one side of a flat substrate.
As shown in FIG. 6, an insulating part 3a meandering vertically at right angles at a certain interval is formed at the center part, and the upper part of the upper and lower parts separated by the insulating part 3a is a conductive part 3b of positive voltage, and the lower part is a negative voltage. Of the conductive portion 3c. Here, the width of the insulating portion 3a in the longitudinal direction is L / 6, and the width of the conductive portions 3b and 3c in the longitudinal direction is L / 3. The power supply board 3 is fixed to the inner wall on one side of the guide rail 1 on which the magnetic pole surface of the permanent magnet 2 faces.

Next, the mover block B has three electromagnets.
4 and a brush 5.

The electromagnet 4 is composed of an opposing piece 4 of a substantially U-shaped iron core 4a.
Coils 4d are wound around b and 4c in mutually opposite directions via a coil frame (not shown).

The brush 5 is fixed to the outside of one of the opposing pieces 4b and 4c forming the iron core 4a of each electromagnet 4 via an insulating plate 5a.

The mover block B has three electromagnets.
4 is fixed to the row body 4e so that the opposing pieces 4b and 4c are lined up in a straight line, and each coil 4d has one end connected to each brush 5 and the other end connected in common. 3
It is configured as a phase electromagnet. At this time, each electromagnet
The length of the brushes 4 in the row direction does not exceed L / 3, and the distance between the brushes 5 is L / 3.

The mover block B includes a guide rail 1
In the upper space, the permanent magnet 2 is interposed between the opposing pieces 4b and 4c of the iron core 4a in the thickness direction of the permanent magnet 2, and the brush 5 is
Are housed in the stator block A so as to be in sliding contact with the center while being pressed. On the other hand, in the lower space of the guide rail 1, the conveying piece 4f is provided with the opening of the partition wall 1b and the guide groove.
Extending from the row body 4e so as to protrude outside through 1a, the transport piece 4f is provided with a roller 4g that rolls in the longitudinal direction on the lower inner wall of the guide rail 1. A hole 4h for connecting an object to be conveyed such as a curtain, for example, is provided in a portion protruding outside the conveying piece 4f.

The operation of this linear motor is configured as described above so that the brush 5 slides in contact with the power supply substrate 3 while pressing it, so that a current always flows through any two of the three-phase coils 4d. Positive and negative voltages are applied to 4d. For example, FIG. 6 in which two electromagnets 4 at both ends are excited.
In this state, the mover block B moves in the direction of the arrow by L / 6 due to the propulsive force generated by the attraction and repulsion between the opposing piece of the iron core, which is the magnetic pole of the electromagnet 4, and the magnetic pole surface of the permanent magnet 2. I do. Then, the sliding position of the brush 5 on the power supply board 3 is changed to excite the two electromagnets 4 at the rear end, and further proceed by L / 6 by the same action. After that, it progresses continuously by L / 6, and L / 6
Are performed six times and the state returns to the state of FIG. Thus, the mover block B moves in the longitudinal direction of the guide rail 1. When moving the mover block B in the reverse direction, the positive and negative voltages of the conductive portions 3b and 3c of the power supply substrate 3 may be reversed.

Next, a configuration which is a feature of the present embodiment will be described. Construct electromagnet device of mover block B 3
The individual electromagnets 4 are not integrally arranged in a single row body as in the conventional example, but each electromagnet 4 is fixed to one row body 4e. That is, as shown in FIG. 3, the electromagnet 4 is made of a rigid material by winding a coil 4d around the opposing pieces 4b and 4c of a substantially U-shaped iron core 4a in mutually opposite directions via a coil frame 4i. The three members are fixed to the row members 4e, and these three members are connected by the connecting member 6 as follows.

As shown in FIG. 2, the connecting member 6 is made of an elastic material such as rubber or a flexible resin. As shown in FIG. It has been formed.

Then, as shown in FIG.
Reference numeral 6 denotes a pair of coil frames 4i each having a coil 4d wound in the opposite direction to a portion surrounded by a vertical piece 6a and a horizontal piece 6b.
The holes of the coil frame 4i are respectively fitted to the opposing pieces 4b and 4c of the three iron cores 4a fixed to the three row members 4e and fixed to the three row members 4e, respectively. That is, the connecting member
6 means that the vertical piece 6a is inserted between the opposing pieces 4b and 4c of each electromagnet 4, and the horizontal piece 6b is inserted between the electromagnets adjacent to each other.
Then, as described above, when the brush 5 shown in FIG. 5 is fixed to one outside of the facing pieces 4b and 4c of each electromagnet 4 via the insulating plate 5a, the mover block B attaches the three electromagnets 4 to each other. It is configured to be connected by the connecting member 6.

In such a linear motor, as described above, the mover block B has the three electromagnets 4 fixed to the three row members 4e, and the electromagnets 4 are respectively opposed to the opposing pieces. 4b and 4c and between the electromagnets adjacent to each other are connected by inserting an elastic connecting member 6, so that a relatively large curve with a degree of curvature is formed in a part of the guide rail 1 in the longitudinal direction. Even if there is a portion, the movable member block B can move smoothly because the connecting member 6 travels along the curved portion while the connecting member 6 bends without bending.

Next, a second embodiment will be described. In this embodiment, a plurality of mover blocks B of the first embodiment are connected in the moving direction in order to increase the conveying force. That is, the connecting member 7 in this case is the first member as shown in FIG.
The connecting member 6 shown in FIG. 2 described in the second embodiment is formed by connecting a plurality of connecting members 7a in the longitudinal direction by connecting portions 7a.
Each of the mover blocks B
Are connected to each other by arranging the connecting members 7 straddling each other.

In this linear motor, in order to increase the conveying force, a plurality of mover blocks B are arranged in the moving direction so that the overall length is longer than in the first embodiment. Despite the need to have elastic connecting members
7 are arranged so as to straddle adjacent to each of the mover blocks, so that they are connected to each other. Therefore, similarly to the first embodiment, the guide rail 1 is also Even when there is a relatively large curved portion in a part, since the connecting member 7 travels while bending, each mover block B can move smoothly.

[0031]

The linear motor according to the present invention is provided with a connecting member formed of an elastic material and having a vertical piece and horizontal pieces extending on both sides of the vertical piece to form a mover block. Each of the U-shaped electromagnets arranged in a row, the vertical piece is inserted between the opposing pieces, and the horizontal piece is inserted between the adjacent electromagnets and connected by a connecting member, so that the guide rails Even when there is a relatively large curved portion having a degree of curvature in a part of the longitudinal direction, the movable member block can move smoothly because the connecting member travels along the curved portion while bending.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a first embodiment of the present invention.

FIG. 2 is a perspective view showing a connecting member according to the first embodiment;

FIG. 3 is a perspective view showing a state in which the electromagnet is fixed to a row body.

FIG. 4 is a partially cutaway perspective view showing the structure of a linear motor.

FIG. 5 is a sectional view of the same.

FIG. 6 is an explanatory diagram showing an operation state of the above.

FIG. 7 is a perspective view showing a connecting member according to a second embodiment of the present invention.

[Explanation of symbols]

 A Stator block 1 Guide rail 2 Permanent magnet 3 Power supply board 3b Conductive part 3c Conductive part B Mover block 4 Electromagnet 4a Iron core 4b Opposing piece 4c Opposing piece 4d Coil 5 Brush 6 Connecting member 6a Vertical piece 6b Horizontal piece 7 Connecting member

Claims (2)

(57) [Claims] 1. A power supply board provided with a cylindrical guide rail, a plate-shaped permanent magnet magnetized in the thickness direction such that the lengthwise direction is alternately and alternately at different intervals, and a conductive portion for positive and negative voltages. A stator block having a permanent magnet and a power supply board fixed along the longitudinal direction of the inner wall of the guide rail,
An electromagnet in which a plurality of electromagnets having a substantially U-shaped iron core in which coils are wound on opposite pieces in opposite directions to each other and having permanent magnets interposed between the opposite pieces of the iron core in the thickness direction of the permanent magnet are provided. Device, and a brush connected to the coil, and a mover block having a brush. The brush slides on the power supply board, and positive and negative voltages are alternately applied to the coil. In the linear motor that moves in the longitudinal direction, a connecting member formed of an elastic material having a vertical piece and a horizontal piece extending on both sides of the vertical piece is attached, and each of the plurality of electromagnets is arranged in a row. A linear motor characterized in that a vertical piece is inserted between opposing pieces and a horizontal piece is inserted between electromagnets adjacent to each other and connected by a connecting member. 2. The linear motor according to claim 1, wherein the connecting member is disposed so as to straddle adjacent to the plurality of movable blocks arranged in the moving direction.