JPH04364352A - Linear motor - Google Patents

Abstract

PURPOSE:To surely connect the conductive parts of power supply boards electrically with each other when coupling two pieces of stator blocks, and simplify the work execution. CONSTITUTION:Cuts 31 and 32 are provided at the ends in the condition that a guide rail 1 and a power supply board 3 are set. And, merely by engaging the respective cuts 31 and 32 of two pieces of stator blocks A with the engaging parts 63 and 64 of a coupling member 6, the conductive members 61 and 62 provided on the engaging parts 63 and 64 abut astride the respective conductive parts 3b and 3c of both power supply boards 3, so those are electrically connected surely, and besides the work execution becomes simple.

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 curtains and transporting articles.

0002

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

[0003] The stator block consists of a cylindrical guide rail with both ends open, a flat permanent magnet magnetized in the thickness direction so that the longitudinal direction alternately has different polarities at regular intervals, and a conductor of positive and negative voltages. A permanent magnet and a power supply board are fixed along the longitudinal direction of the inner wall of the guide rail.

The mover block has a substantially U-shaped iron core with coils wound in opposite directions on opposing pieces, and a permanent magnet is interposed between the opposing pieces of the iron core in the thickness direction. It is formed by having an electromagnet device in which a plurality of electromagnets are arranged in a row, and a brush connected to a coil.

[0005]The brush slides against the power supply board and positive and negative voltages are alternately applied to the coil, causing the mover block to move in the longitudinal direction of the cylindrical guide rail, thereby moving the curtain connected to the mover block. It is designed to open and close and transport goods.

[0006]

[Problems to be Solved by the Invention] In the conventional linear motor described above, the stator block is provided in a predetermined length, and depending on the installation location at the site where it is used, the stator block In this case, it is necessary to electrically connect the conductive parts of the respective power supply boards provided on the two stator blocks. Therefore, a jumper wire or the like is soldered between the corresponding conductive parts, and the connection is unstable.
Moreover, it required a lot of effort and time, which caused problems in terms of construction.

The present invention has been made in view of the above reasons, and its object is to connect the conductive parts of the respective power supply boards when connecting two stator blocks. To provide a linear motor with reliable connection and easy construction.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the linear motor of the present invention includes a cylindrical guide rail with both ends open, and a guide rail with a thickness such that the longitudinal direction is alternately different in polarity at regular intervals. A fixing device that has a flat permanent magnet magnetized in the direction and a power supply board provided with a conductive part for positive and negative voltages, and the permanent magnet and the power supply board are fixed along the longitudinal direction of the inner wall of the guide rail. A plurality of electromagnets are arranged in a row, each having a substantially U-shaped iron core with coils wound in opposite directions on the child block and opposing pieces, and a permanent magnet interposed in the plate thickness direction between the opposing pieces. A movable block including an electromagnet device and a brush connected to a coil, the brush slidingly contacts a power supply board, positive and negative voltages are alternately applied to the coil, and the movable block moves. In a linear motor,
A notch is provided at the end of the power feeding board located at the open end of the guide rail, and a fitting part is provided with a conductive member, and the fitting part fits into the notch of each of the two power feeding boards. The structure includes a connecting member that is inserted into the connecting member so that the conductive member straddles and abuts the respective conductive portions of both power supply boards.

[0009]

[Operation] According to the linear motor of the present invention, a notch is provided at the end of the power supply board located at the open end of the guide rail, and a fitting portion is provided with a conductive member. The two stator blocks are connected because the conductive member is provided with a connecting member that straddles and abuts the respective conductive parts of both power supply boards by fitting into the notches of each of the power supply boards. At this time, by simply fitting the notches of each power supply board into the fitting portions of the connecting member, the respective conductive parts of both power supply boards can be reliably connected by the conductive member, and the construction can be easily performed.

0010

Embodiment FIGS. 1 to 6 show an embodiment of the present invention. In explaining this embodiment, first, the basic configuration and operation of a linear motor to which the present invention is applied will be explained based on FIGS. 4 to 6.

[0011] This linear motor has a stator block A.
and a mover block B, and is configured as follows.

First, the stator block A consists of 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 a cylindrical shape with both ends open, a guide groove 1a provided in the center of the lower side as shown in FIG. 5, and a substantially rectangular cross section. Inside the rectangle, a two-stage space divided into an upper and lower space is formed by a partition wall 1b having an opening in a part.

The permanent magnet 2 is formed in the shape of a flat plate, and one thick end surface of the permanent magnet 2 is fixed to the center of the inner wall of the upper side of the guide rail 1 along the longitudinal direction. As shown in FIG. 4, the magnets are magnetized in the thickness direction so that the longitudinal direction has different polarities alternately at regular intervals. Here, let L be the length of a pair of magnet pieces consisting of an N pole and an S pole in the longitudinal direction.

As shown in FIG. 6, the power supply board 3 has an insulating part 3a formed in the center on one side of a flat board that meanders vertically at a right angle at regular intervals, and is separated by the insulating part 3a. The upper and lower portions are formed such that the upper part thereof is a conductive part 3b of positive voltage, and the lower part thereof is a conductive part 3c of negative voltage. Here, the width of the insulating part 3a in the longitudinal direction is L/6, and the conductive part 3
b, 3c are each formed to have a longitudinal width of L/3. The power supply board 3 is fixed to the inner wall on one side of the guide rail 1 facing the magnetic pole surface of the permanent magnet 2, with its end aligned with the open end of the guide rail 1.

Next, the mover block B consists of an electromagnet device consisting of three electromagnets 4 and a brush 5.

The electromagnet 4 is formed by winding coils 4d in opposite directions around opposing pieces 4b and 4c of a substantially U-shaped iron core 4a.

The brush 5 has an insulating plate 5a on the outside of one of opposing pieces 4b and 4c forming the iron core 4a of each electromagnet 4.
has been fixed through.

In the movable block B, the three electromagnets 4 are integrally fixed to the array body 4e so that the opposing pieces 4b and 4c are arrayed in a straight line, and each coil 4d is connected to one end of the array member 4e. is connected to each brush 5 and the other end is commonly connected to form a three-phase electromagnet. At this time, the length of each electromagnet 4 in the row direction is L/3
The distance between each brush 5 is set to L/3.

The movable block B has opposing pieces 4b and 4 of the iron core 4a in the upper space of the guide rail 1.
The brush 5 is housed in the stator block A with the permanent magnet 2 being interposed between the permanent magnets 2 and 3 in the thickness direction, and the brush 5 being placed in sliding contact with the center of the power supply board 3 while applying pressure. On the other hand, in the lower space of the guide rail 1, a connecting piece 4f is extended from the array body 4e so as to pass through the opening of the partition wall 1b and the guide groove 1a and protrude to the outside. A roller 4g that rolls in the longitudinal direction on the inner wall of the lower side of the guide rail 1 is provided. A hole 4h to which an object to be transported such as a curtain is connected is provided in a portion of the connecting piece 4f that projects to the outside.

The operation of this linear motor is configured as described above, so that the brush 5 slides into contact with the power supply board 3 while applying pressure, and the coils are connected so that current always flows through any two of the three-phase coils 4d. Positive and negative voltages are applied to 4d. For example, when the two electromagnets 4 at both ends are excited in the state shown in FIG. 6, the propulsive force is due to the attraction and repulsion between the opposing pieces of the iron core that serve as the magnetic poles of the electromagnets 4 and the magnetic pole surface of the permanent magnet 2. Accordingly, the movable block B advances by L/6 in the direction of the arrow. Then, the sliding position of the brush 5 1 to the power supply board 3 changes, and the two electromagnets 4 at the rear end are excited, and the brush 5 continues to advance further by L/6 due to the same action. Thereafter, the process advances continuously by L/6, and after progressing L/6 six times, the state returns to the state shown in FIG. In this way, the mover block B will advance in the longitudinal direction of the guide rail 1. In addition, when moving the movable block B in the opposite direction, the power supply board 3
The positive and negative polarities of the voltages of the conductive parts 3b and 3c may be reversed.

Next, the characteristic configuration of this embodiment will be explained. As mentioned above, the power supply board 3 is fixed with its end aligned with the open end of the guide rail 1,
At its end, as shown in FIG.
Square cutouts 31 and 32 are provided by cutting out the guide rail 1 and the guide rail 1 together.

The connecting member 6 is formed with fitting portions 63 and 64 provided with conductive members 61 and 62, respectively. Specifically, the fitting portions 63 and 64 are each formed in the shape of a rectangular parallelepiped at both central ends of the flat base portion 65 using an insulating material. On the other hand, the electrically conductive members 61, 62 are formed by electrically conductive plates such that leg pieces 61b, 62b extend from both ends of flat central pieces 61a, 62a into a V-shape with their tips bent outward. There is. And the conductive member 6
1 and 62 are fixed to recesses provided in the longitudinal direction of the ceiling surfaces of the fitting parts 63 and 64 so that the leg pieces 61b and 62b are on the base part 65 side. At this time, the leg piece 61b
, 62b and the base portion 65 is slightly shorter than the sum of the plate thicknesses of both the guide rail 1 and the power supply board 3. In addition, the fitting parts 63 and 64
Its width is approximately the same as the width of the notches 31, 32, and its length is twice the depth of the notches 31, 32.

When connecting the two stator blocks A, the notches 31 and 32 provided in each are inserted into the connecting member 6.
Along the longitudinal direction of the fitting parts 63, 64, the base part 6
5 are positioned on the outer surfaces of the two guide rails 1, and the two power supply boards 3 are fitted to the fitting portion 6.
Since the length of the notches 3 and 64 is twice the depth of the notches 31 and 32, the notches 31 and 32 fit into the fitting parts 63 and 64 with their respective end surfaces abutting each other, and The tips of the legs 61b, 62b of the conductive members 61, 62 are in contact with each other across the conductive parts 3b, 3c. At this time, the shortest distance between the tips of the leg pieces 61b and 62b and the base part 65 is between the guide rail 1 and the power supply board 3.
Since the dimensions are slightly shorter than the sum of the board thicknesses of the two power supply boards 3 and 3, there is a certain amount of contact pressure between the conductive parts 3b and 3c of the two power supply boards 3. FIG. 2 shows this state.

The coupler 7 of FIG. 3 is then used to further mechanically couple the two stator blocks A. This connector 7 has an internal space cross-sectional shape of the connecting member 6.
The guide rail 1 has a groove 7a that escapes the base portion 65 of the guide rail 1.
The outer shape is the same as that of the two guide rails 1.
It is disposed across both outer sides of the holding piece 7b, and is fixed by screwing into a screw hole 7c provided in the holding piece 7b.

In such a linear motor, the notch 31
, 32 are provided at the ends of the guide rail 1 of the stator block A and the power supply board 3 together, and fitting portions 63, 64 provided with conductive members 61, 62 are provided.
The fitting parts 63 and 64 fit into the respective notches 31 and 32 of the two stator blocks A, so that the conductive members 61 and 62 are connected to the respective conductive parts 3b and 3b of both power supply boards 3, respectively. Connecting member 6 that straddles and abuts on 3c
When connecting two stator blocks A, the notches 31 and 32 of each stator block A are provided.
The conductive parts 3b, 3c of both power supply boards 3 can be reliably connected by the conductive members 61, 62 by simply fitting them into the fitting parts 63, 64 of the connecting member 6, and can be easily installed. becomes.

In this embodiment, since the notches 31 and 32 are provided in the state where the guide rail 1 and the power supply board 3 are aligned, the base portion 65 of the connecting member 6 is located on the outer surface of the guide rail 1. However, by creating a gap between the inner wall of the guide rail 1 and the power supply board 3,
If the base portion 65 of the connecting member 6 is positioned in the gap, the notches 31 and 32 are not necessary in the guide rail 1 and only need to be provided in the power supply board 3.

[0028]

Effects of the Invention The linear motor of the present invention has a cutout at the end of the power supply board located at the open end of the guide rail, and a fitting portion provided with a conductive member. The two stator blocks are connected because the conductive member is provided with a connecting member that straddles and abuts the respective conductive parts of both power supply boards by fitting into the notches of each of the power supply boards. At this time, by simply fitting the notches of each power supply board into the fitting portions of the connecting member, the respective conductive parts of both power supply boards can be reliably connected by the conductive member, and the construction can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a state in which a power supply board according to an embodiment of the present invention is connected with a connecting member.

FIG. 2 is a perspective view showing a state in which the above power supply boards are connected by a connecting member.

FIG. 3 is a perspective view showing a connector that mechanically connects the stator blocks same as above.

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

FIG. 5 is a sectional view of the same as above.

FIG. 6 is an explanatory diagram showing the operating state of the same as above.

[Explanation of symbols]

A Stator block 1 Guide rail 2. Permanent magnet 3 Power supply board 3b Conductive part 3c Conductive part 31 Notch 32 Notch B Mover block 4 Electromagnet 4a Iron core 4b Opposing piece 4c Opposing piece 4d coil 5 Brush 6 Connecting member 61 Conductive member 62 Conductive member 63 Fitting part 64 Fitting part

Claims (1)

[Claims] [Claim 1] A cylindrical guide rail with both ends open, a flat plate-shaped permanent magnet magnetized in the thickness direction so that the longitudinal direction has different polarities alternately at regular intervals, and a conductive part 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; and a stator block having coils wound in opposite directions on opposing pieces. A mover block comprising an electromagnet device in which a plurality of electromagnets each having a letter-shaped iron core and a permanent magnet interposed in the thickness direction between opposing pieces thereof are arranged in a row, and a brush connected to a coil. In the linear motor, the movable block is moved by brushes slidingly contacting the power supply board and positive and negative voltages being alternately applied to the coils, the end of the power supply board located at the open end of the guide rail. It has a notch and a fitting part provided with a conductive member, and the fitting part fits into the notch of each of the two power supply boards, so that the conductive member connects to the conductive part of each of the two power supply boards. A linear motor characterized by comprising a connecting member that straddles and abuts.