JP2508614B2 - 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 includes a cylindrical guide rail, a plate-shaped permanent magnet magnetized in the plate thickness direction so that the longitudinal direction is alternately different poles at regular intervals, and one side has a positive and negative voltage conductivity. And a power supply board provided with a portion, and the permanent magnet and the power supply board are fixedly formed along the longitudinal direction of the inner wall of the guide rail.

The mover block has substantially U-shaped iron cores in which coils are wound around the facing pieces in opposite directions via coil frames, and a permanent magnet plate is provided between the facing pieces of the iron cores. An electromagnet device in which a plurality of electromagnets interposed in the thickness direction are fixed and arranged in a row by an adhesive or the like in an array body made of an insulating material, and a brush fixed to one opposing piece of an iron core via an insulating member. And are formed.

The ends of the coils of the plurality of electromagnets are directly soldered to each other, with one end being a brush and the other end being common.

The operation is performed by connecting the brush to the mover block by slidingly contacting one surface of the power supply board and alternately applying positive and negative voltages to the coil to move the mover block in the longitudinal direction of the guide rail. It is designed to open and close curtains and convey articles.

[0007]

In the conventional linear motor described above, in the mover block, the ends of each coil are directly soldered to each other with one end being a brush and the other end being common. Connection work is troublesome, and work such as bonding is required to fix the coil frame to the iron core and the iron core to the row body, which is troublesome and troublesome. If the adhesive is peeled off, a problem that the mover block does not operate normally may occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a linear motor having a mover block that is easy to assemble and can firmly fix each member. It is in.

[0009]

In order to solve the above-mentioned problems, a linear motor of the present invention is attached to a cylindrical guide rail in the plate thickness direction so that the longitudinal direction is alternately different poles at regular intervals. A stator block having a magnetized flat plate-shaped permanent magnet and a power feeding substrate provided with a conductive portion for positive and negative voltages, and fixing the permanent magnet and the power feeding substrate along the longitudinal direction of the inner wall of the guide rail. , An electromagnet having a substantially U-shaped iron core in which coils are wound in opposite directions through a coil frame in opposite directions, and the permanent magnet is interposed between the opposing pieces of the iron core in the plate thickness direction. A movable element block having a plurality of electromagnet devices arranged in a line in a row and made of an insulating material and a brush connected to a coil is provided, and the brush slides while being urged by the power supply board. Moves when positive and negative voltages are alternately applied to the coils in contact with each other In a linear motor in which a block moves in the longitudinal direction of a guide rail, a coil terminal is provided on the coil frame, and one end of the block is arranged to be connected to the coil terminal so that the coils of the plurality of electromagnets can be connected to each other. In addition, a plurality of connecting pieces are erected on the row body.

[0010]

According to the linear motor of the present invention, a coil frame is provided with a coil terminal, and one end of the coil frame is connected to the coil terminal so that a plurality of coils of a plurality of electromagnets can be connected to each other. Since the connecting pieces are erected in a row, in the assembly work of the mover block, unlike the conventional example, the troublesome work of directly solder-connecting the ends of each coil is not necessary, and The coils can be connected, and each member of the iron core, coil frame, and row body is firmly fixed by the connecting piece without the laborious work such as adhesion unlike the conventional example. Will be fixed to.

[0011]

1 to 8 show an embodiment of the present invention. In describing 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. 6 to 8.

This linear motor comprises a stator block A and a mover block B and is constructed as follows.

First, the stator block A is 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 opened, and as shown in FIG. 7, a guide groove 1a is provided at the center of the lower side to form a tubular shape having a substantially rectangular cross 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 face of the plate thickness thereof is fixed to the center portion of the inner wall of the upper side of the guide rail 1 along the longitudinal direction. Then, as shown in FIG. 8, the plates are magnetized in the plate thickness direction so that the longitudinal direction is alternately different poles at regular intervals. Here, the length of one set of magnet pieces consisting of N pole and S pole in the longitudinal direction is L.

As shown in FIG. 8, the power supply board 3 is provided with a positive voltage conductive part 3b and a negative voltage conductive part 3c on one surface of the flat board at right angles in the vertical direction at regular intervals. It is formed of copper foil so as to be separated into upper and lower parts by the meandering insulating portion 3a. Here, the width of the insulating portion 3a in the longitudinal direction is L
/ 6, the width of the conductive portions 3b and 3c in the longitudinal direction is formed to be L / 3. The power supply board 3 is fixed to the inner wall on one side of the guide rail 1.

Next, the mover block B is composed of three electromagnets.
It is composed of an electromagnet device in which 4 is arranged in a line 41 and a brush 5.

The electromagnet 4 is a facing piece 4 of a substantially U-shaped iron core 4a.
Coils 4d are formed on b and 4c by winding them in opposite directions via two coil frames 4e.

The brush 5 is fixed to the outer side of one of the facing pieces 4b, 4c forming the iron core 4a of each electromagnet 4 via an insulating member 5a.

The mover block B is composed of three electromagnets.
4 is fixed to the row installation body 41 so that the opposing pieces 4b and 4c are arranged in a line in a straight line, and each coil 4d is connected to each brush 5 at one end and commonly connected at the other end. Three
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 is a guide rail.
In the upper space of 1, the permanent magnet 2 is inserted between the facing pieces 4b and 4c of the iron core 4a in the thickness direction of the stator block A, and the brush 5 is attached to one surface of the power supply board 3. The substantially central portion of the sliding contact. On the other hand, in the lower space of the guide rail 1, a conveying piece 4h is extended from the row body 41 so as to project outside through the opening of the partition wall 1b and the guide groove 1a. Guide rail
A roller 4i that rolls in the longitudinal direction on the inner wall of the lower side of 1 is provided. Then, an object to be conveyed such as a curtain is connected to a portion of the conveying piece 4h that protrudes to the outside.

Next, the operation of this linear motor will be described. When the brush 5 is brought into sliding contact with one surface of the power supply board 3, 3
Positive and negative voltages are applied to the coil 4d so that current always flows in any two phases of the phase coils 4d. For example, when the two electromagnets 4 at both ends are excited, as shown in FIG. 8, the opposing pieces 4b, 4c of the iron core 4a, which are magnetic poles of the electromagnet 4,
The movable block B in the direction of arrow L / 6 by the propulsive force due to the attraction and repulsion between the magnetic pole surface of
Progresses. Then, this time, the sliding contact position of the brush 5 with respect to the power supply board 3 is changed, the two electromagnets 4 at the rear end are excited, and subsequently the same action further advances by L / 6. After that, the L / 6 progresses continuously, and L / 6 becomes 6
The process proceeds once and returns to the state of FIG. In this way, the mover block B advances 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. Further, if the mover blocks B are connected by an integral multiple, the carrying force increases substantially in proportion to the number of connections.

Next, the characteristic structure of this embodiment will be described. As described above, the mover block B includes the electromagnet device in which the three electromagnets 4 are arranged in the row body 41, and each of the electromagnets 4 has a substantially U-shaped iron core 4a that faces the opposing pieces 4b and 4c. The coils 4d are formed by winding the coils 4d in opposite directions to each other through the two coil frames 4e, and the configuration thereof will be described in detail below.

As shown in FIG. 4, on each of the two coil frames 4e, two coil terminals 4f are erected on the outside of one of the collars, and the coil terminals 4f are wound in opposite directions. The terminal of the mounted coil 4d is connected. And electromagnet
4 is formed by inserting the two coil frames 4e into the facing pieces 4b and 4c of the iron core 4a.

The row member 41 is made of an insulating material such as a synthetic resin and is formed in a substantially flat plate shape as shown in FIG.
At the center, there is a square recess 41a for mounting the iron core 4a.
Individually arranged in the longitudinal direction. Then, each recess 41
Four connecting pieces are erected on the outer thick portion surrounding a.

As shown in FIG. 3, the four connecting pieces are made of a conductive plate having a spring property, and have one connecting piece 42a formed by bending both ends to form a substantially U-shape, and the connecting piece 42a. Two connecting pieces 42b formed by arranging those having the same shape as the connecting piece 42a in parallel with the inside of the connecting piece 42a facing each other and connecting the base ends thereof.
And one connecting piece 42c arranged in parallel with the connecting piece 42a
It is formed as an individual block. Then, the three blocks are formed as an array pattern in which the base end portions of the respective connection pieces 42c are connected to each other and are arranged in a row in the longitudinal direction. As shown in FIG. The base end portion of is embedded and integrally formed with the row body 41. In addition, a U-shaped cutout is provided at the bent end of each connection piece.
42d is provided.

Then, as shown in FIG. 1, three electromagnets 4 are provided.
The iron cores 4a are inserted into the three recesses 41a of the row body 41 so that the facing pieces 4b and 4c are arranged in a line. At the time of this insertion, the coil frame 4e is inserted with each connecting piece having springiness spread outward so that the coil frame 4e does not hit the bent one end of each connecting piece. As the pieces return to their original state, one end of each connecting piece will hold the coil frame 4e by inserting the coil terminal 4f into the cutout 42d. When the connection pieces and the coil terminals 4f are soldered to each other at the cutouts 42d, the iron core 4a, the coil frame 4e, and the row body 41 are fixed by the connection pieces and the three electromagnets are fixed. As shown in FIG. 5, each coil 4d of 4 is connected to the brush 5 at one end and commonly to the other end by each connecting piece, as shown in FIG.
Will be configured as a three-phase electromagnet device, and its operation will be the same as the basic configuration described above with reference to FIGS. 6 to 8.

[0028]

According to the linear motor of the present invention, a coil terminal is provided on the coil frame, and one end of the linear motor is connected to the coil terminal so that the coils of the electromagnets can be connected to each other. Since the connecting pieces are erected in a row, in the assembly work of the mover block, unlike the conventional example, the troublesome work of directly solder-connecting the ends of each coil is not necessary, and The coils can be connected, and each member of the iron core, coil frame, and row body is firmly fixed by the connecting piece without the laborious work such as adhesion unlike the conventional example. Will be fixed to.

[Brief description of drawings]

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

FIG. 2 is a partial perspective view showing the above-mentioned row structure.

FIG. 3 is a perspective view showing an arrangement pattern of the above-mentioned connecting pieces.

FIG. 4 is a perspective view showing a coil and a coil frame of the same.

FIG. 5 is a circuit diagram showing a connection state of the coils of the above.

FIG. 6 is a perspective view showing a structure of a mover block of a linear motor.

FIG. 7 is an overall sectional view of the above.

FIG. 8 is an explanatory diagram showing an operating state of the above.

[Explanation of symbols]

 A Stator block 1 Guide rail 2 Permanent magnet 3 Power supply board 3b Positive voltage conducting part 3c Negative voltage conducting part B Mover block 4 Electromagnet 4a Iron core 4b Opposing piece 4c Opposing piece 4d Coil 4e Coil frame 4f Coil terminal 41 rows Assembly 42a Connection piece 42b Connection piece 42c Connection piece 5 Brush

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norihi Shiraiwa 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) Reference JP-A-3-49554 (JP, A) Mitsuihei 1-103385 (JP, U) Actually open 61-52492 (JP, U)

Claims (1)

(57) [Claims] 1. A power supply board provided with a tubular guide rail, a plate-shaped permanent magnet magnetized in the plate thickness direction so that the longitudinal direction alternates with different poles at regular intervals, and a conductive portion of positive and negative voltages. And 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,
A plurality of electromagnets each having a substantially U-shaped iron core in which a coil is wound around the facing piece in opposite directions via a coil frame, and a permanent magnet is interposed between the facing pieces of the iron core in the plate thickness direction. An armature block having electromagnet devices, each of which is arranged in a row by an insulating material, and a brush connected to a coil, is provided. In the linear motor in which the mover block moves in the longitudinal direction of the guide rail by alternately applying positive and negative voltages to the coil, a coil terminal is provided on the coil frame and one end is connected to the coil terminal. A linear motor, wherein a plurality of connecting pieces arranged so as to be able to connect between the coils of the plurality of electromagnets are erected on the row body.