JP4507324B2 - Linear slider - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear slider that freely moves a table with respect to a fixed base by a linear motor, and more particularly to a method for processing a power supply cable of a linear motor.
[0002]
[Prior art]
Conventionally, a linear slider that can freely move a table with respect to a fixed base by a linear motor is as shown in FIGS. 3 is a plan view of a conventional linear slider as seen from above, and FIG. 4 is a side view as seen from the direction of arrow C in FIG. In the figure, 31 is a fixed base, 32 is a guide rail provided on the left and right ends on the fixed base 31, 33 is a slider that forms a linear guide in pairs with the guide rail 32, and 34 is along the guide rail 32 (on the paper surface). (Vertical direction) is a table provided to move. 35 is a linear motor, 36 is a field yoke fixed in parallel on the fixed base 31, 37 is a plurality of permanent magnets arranged along the field yoke 36 (perpendicular to the plane of the drawing), and 38 is magnetic with the permanent magnet 37. 39 is an armature coil formed by laminating electromagnetic steel plates provided facing each other via a static gap, and is wound around a winding housing portion of the armature core 38, and is fixed by a resin mold 44. . In such a linear motor 35, a field yoke 36 and a field permanent magnet 37 constitute a stator 40, and an armature core 38 and an armature coil 39 constitute a mover 41 (linear motor armature). (Gap facing structure). Further, 42 power supply cable for supplying a drive current from a power source (not shown) to the armature coils 39, 43 in the caterpillar structure provided on the side surface side of the linear motor 35, cableveyor for supporting and guiding the feeder cable 42 ( And a slide mechanism that reciprocates the power feeding cable 42 as the mover 41 moves.
[0003]
[Problems to be solved by the invention]
However, in the conventional linear slider, the cable bearer 13 that supports and guides the feeding cable 12 is provided in parallel on the side surface side of the mover 11 along the traveling direction of the mover 11 of the linear motor 5. In particular, in the case of a multi-head structure in which a plurality of movable elements 11 are arranged (two in the figure), it is necessary to use the same number of cable bears 13 according to the number of movable elements 11. There is a problem that the installation space to be obtained becomes wide and the entire apparatus cannot be reduced in size. In addition, since the power supply cable 12 has a long distance from the armature coil 9 to the cable bear 13 through the bottom of the table 4, there is a problem that the processing of the power supply cable 12 is complicated. Further, in the linear slider, there is a problem that when a workpiece or tool (not shown) mounted on the table 4 or an external object comes into contact with the power supply cable 12 or the cable bear 13 due to some trouble, these are damaged.
The present invention has been made in order to solve the above-described problems, and in particular, when a plurality of linear motor movable elements are arranged, space saving and downsizing are possible, and the power supply cable can be easily processed and is a safe linear. An object is to provide a slider.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention of claim 1 is directed to a linear guide comprising a guide rail and a slider for movably guiding and supporting a table disposed in parallel to the fixed base, and the table to the fixed base. A linear slider that includes a linear motor that reciprocates along a longitudinal direction on the guide rail and that moves the table by supplying a driving current to the linear motor via a power supply cable. Are arranged to face each other through a fixed gap and a stator constituting a linear motor field part, which is arranged on the fixed base so as to be vertically opposed to each other. And the fixed base penetrates from the opposite surface side of the mover to the surface opposite to the mover, and A slit for passing the feeding cable is provided so as to extend in a line along the moving direction of the mover, and the lower part of the fixed base is inserted into the slit from the mover side into the slit. A cable bear (registered trademark) having a slide mechanism that guides and supports the cable according to the movement of the mover is provided, and when a plurality of movers of the linear motor are arranged in the traveling direction, A number of cable bears corresponding to the number of movers are prepared, and the plurality of cable bears are provided on the side opposite to the fixed base of the linear guide in a symmetrical position with respect to the central axis passing through the slit. It is characterized by that.
According to a second aspect of the present invention, in the linear slider according to the first aspect of the present invention, an outlet for a power feeding cable attached to the plurality of movable elements is provided at a position where the movable elements face each other. .
According to a third aspect of the present invention, in the linear slider according to the first aspect, the linear motor field portion of the linear motor has a plurality of magnetic poles that are alternately different along a magnetic field yoke made of a magnetic material. The linear motor armature portion is composed of an armature coil wound around the armature core.
According to a fourth aspect of the present invention, in the linear slider according to the first aspect, the linear motor field portion of the linear motor is formed of an inductor having inductor teeth made of a magnetic material. The linear motor armature portion is composed of an armature core through which magnetic flux passes, an armature coil wound around the armature core, and a permanent magnet provided at the tip of the tooth portion of the armature core. is there.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are linear sliders showing an embodiment of the present invention, wherein FIG. 1A is a plan view seen from the upper surface, and FIG. 1B is a front view taken along line A-A in FIG. What is represented as a front sectional view is divided into a left half and a left half of the drawing. In the figure, 1 is a fixed base, 1A is a slit, 2 is a guide rail, 3 is a slider, and 4 is a table. 5 is a linear motor, 6 is a permanent magnet, 7 is a field yoke, 8 is an armature core, 9 is an armature coil, 10 is a stator, 11 is a mover, 12 is a feeding cable, and 13 is a cable bear. The differences between the present invention and the conventional one will be described below. The linear motor 5 has two plate-like field yokes 7 arranged at an interval so as to face each other perpendicularly to the surface of the fixed base 1 and magnetic poles alternately along the longitudinal direction of each field yoke 7. The stator 10 is composed of a plurality of permanent magnets 6 that are fixed so as to be different from each other, and the armature core 8 and the armature core 8 that are arranged to face each other through a row of the permanent magnets 6 with a certain gap. It comprises a mover 11 (armature) comprising armature coils 9 arranged in line on both side surfaces (magnetic flux penetrating structure). Further, the fixed base 1 has a slit 1 </ b> A penetrating from the opposite surface side of the movable element 11 to the surface opposite to the movable element 11 so as to pass through the central axis of the left and right guide rails 2 in the traveling direction of the movable element 11. It is provided so as to extend in a line along. Note that the width of the slit 1A is large enough to pass the power supply cable 12, and the length in the longitudinal direction is equal to or longer than the movable stroke of the linear motor. Further, a cable bearer 13 having a slide mechanism for pulling out the feeding cable 12 from the movable element 11 into the slit 1 </ b> A and guiding and supporting the feeding cable 12 as the movable element 11 moves at the lower part of the fixed base 1. Is arranged. Then, a plurality of movers 11 of the linear motor are arranged in the advancing direction, and the number of cable bears 13 corresponding to the number of movers 11 is prepared, and the plurality of cable bears 13 are fixed to the fixed base 1 of the linear guide. of the central axis and symmetrically through the slits on the opposite side are disposed respectively. Next, the operation will be described. In the above-described configuration, the movable element generates a constant thrust by supplying a driving current from a power source (not shown) to the armature coil via the power supply cable. As a result, as the mover moves on the guide rail with respect to the fixed base, the power feeding cable moves from the armature coil side in the cable bear connected to the power feeding cable through the slit of the fixed base. This cable carrier is provided at the lower part of the fixed base and supports the power supply cable and functions as a guide. Therefore, while the mover is moving, the work or tool mounted on the table or an external object is connected to the power supply cable or cable. It will not be damaged by touching the bear. Therefore, the linear slider of the present invention uses a magnetic flux penetrating linear motor, and passes the power supply cable through a slit provided between the armature coil and the cable bear, and guides and supports the power supply cable with the cable bear. Therefore, when a plurality of linear motor movers are used, it is not necessary to take a large installation space on the fixed base, and the entire apparatus can be reduced in size. Further, since the distance from the feeding cable to the cable track is shortened, the cable processing can be facilitated. Further, it is possible to avoid the problem that the work or tool mounted on the table or an external object comes into contact with the power supply cable or the cable bear due to some trouble and is damaged.
Next, other embodiments of the present invention will be described.
FIG. 2 is a plan view of a linear slider showing another embodiment of the present invention. A plurality of movers of the linear motor are arranged in the advancing direction, and a take-out port for the power feeding cable 12 attached to the mover is provided at a position where the movers face each other. The operation is the same as that of FIG. In this embodiment, since the length in the longitudinal direction of the slit provided in the fixed base can be made the shortest distance compared to the first embodiment, the same effect as the configuration of FIG. 1 can be obtained. In addition to reducing the mechanical strength of the fixed base, there are advantages of reducing deformation due to the attractive force between the permanent magnet and the armature. In this embodiment, the fixed base of the linear slider may be attached at an angle of 0 to 45 degrees, or 45 to 90 degrees with respect to the floor surface, without limiting the mounting angle of the linear slider, It can be selected appropriately. In addition, in this linear motor, the linear motor armature portion is composed of the armature coil wound around the armature core. I do not care. The characteristics of the linear motor are the same as the characteristics of the linear motor of this embodiment. Further, in the linear motor used in the linear slider, the linear motor field portion is configured by an inductor having inductor teeth made of a magnetic material, and the linear motor armature portion is configured with an armature core that passes magnetic flux. The armature coil wound around the armature core and the permanent magnet provided at the tip of the tooth portion of the armature core may be replaced. The characteristics of the linear motor are the same as the characteristics of the linear motor of this embodiment.
[0006]
【The invention's effect】
As described above, according to the present invention, the power supply cable for the linear motor provided on the linear slider is passed through the slit provided on the fixed base and taken out to the lower part on the back side of the fixed base. Since the configuration is such that the installed cable track is guided and supported through the feeding cable, particularly when a plurality of linear motor movers are used, the installation space for mounting on the fixed base of the linear slider can be reduced, and the slider device The machine design can be simplified, and the entire apparatus can be reduced in size. In addition, since the distance from the feeding cable to the cable track is shortened, the cable processing can be facilitated. Further, it is possible to avoid the problem that the work or tool mounted on the table or an external object comes into contact with the power supply cable or the cable bear due to some trouble and is damaged. Further, in the case of a slider device that operates a plurality of movers, the length of the slit can be shortened by arranging the movers so that their lead outlets face each other. In addition to suppressing the mechanical strength of the fixed base, this can reduce deformation due to the attractive force between the permanent magnet and the armature.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a linear slider showing an embodiment of the present invention, in which (a) is a plan view seen from the upper surface thereof, (b) is a front view taken along line AA in FIG. What is represented as a figure is shown separately in the left half and the left half of the figure.
FIG. 2 is a plan view showing another embodiment of the present invention.
FIG. 3 is a plan view of a conventional linear slider as viewed from above.
4 is a side view of the linear slider of FIG. 3 as viewed from the direction of arrow C. FIG.
[Explanation of symbols]
1: fixed base 1A: slit 2: guide rail 3: slider 4: table 5: linear motor 6: permanent magnet 7: field yoke 8: armature core 9: armature coil 10: stator 11: mover 12: Feed cable 13: Cable bear

Claims (4)

A linear guide composed of a guide rail and a slider that movably guides and supports a table arranged in parallel and opposite to the fixed base, and a linear that reciprocates the table with respect to the fixed base along the longitudinal direction of the guide rail. In a linear slider provided with a motor and configured to move the table by supplying a drive current to the linear motor via a power supply cable,
The linear motor includes a stator that forms a linear motor field portion that is disposed on the fixed base so as to be vertically opposed to each other, and a fixed gap between the stator and the stator. It consists of a mover that constitutes a linear motor armature section arranged oppositely,
The fixed base penetrates from the opposite surface side of the mover to the surface opposite to the mover, and slits for passing the power supply cable extend in a line along the moving direction of the mover. Provided,
The lower part of the fixed base is provided with a cable bear (registered trademark) having a slide mechanism that guides and supports the feeding cable after passing through the slit from the movable element side as the movable element moves. And
When a plurality of movers of the linear motor are arranged in the traveling direction, the cable bearers are prepared in a number corresponding to the number of the movers, and the plurality of cable bears are fixed to the linear guide. The linear slider is provided on the opposite side to the center axis passing through the slit and distributed in a symmetrical position. The linear slider according to claim 1, wherein an outlet of a feeding cable attached to the plurality of movable elements arranged is provided at a position where the movable elements face each other. Among the linear motors, the linear motor field portion is composed of a plurality of permanent magnets having different magnetic poles along a field yoke made of a magnetic material, and the linear motor armature portion is formed on the armature core. The linear slider according to claim 1, comprising a wound armature coil. Among the linear motors, the linear motor field part is composed of an inductor having inductor teeth made of a magnetic material, and the linear motor armature part is connected to an armature core that passes magnetic flux, and the armature core. The linear slider according to claim 1, comprising a wound armature coil and a permanent magnet provided at a tip of a tooth portion of the armature core.

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