JP2015099880A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine in which a work head moves along a linear guide beam and which can transmit electric power to the work head contactlessly and stably.SOLUTION: A work machine in which a work head 10 moves along a linear guide beam 20 comprises: on the guide beam 20 side, power-transmitting electrodes 21 continuously along the guide beam; and, on the work head 10 side, power-receiving electrodes 12 opposed to the power-transmitting electrodes 21. Electric power is transmitted from the power-transmitting electrodes 21 to the power-receiving electrodes 12 by an electric field coupling system.

Description

  The present invention relates to a work machine in which a work head moves along a linear guide beam.

  An example of such a working machine is an electronic component mounting apparatus that mounts an electronic component such as an IC chip on a printed circuit board.

  As shown in FIG. 5, the electronic component mounting apparatus includes a mounting head 100 having a nozzle as a work head. The mounting head 100 is attached so as to be movable in the X direction along an X direction beam 200 as a guide beam. The X-direction beam 200 is bridged between a pair (two) of Y-direction beams 300 that are orthogonal to the X-direction beam and disposed at a predetermined interval in the X direction. It is movably attached. As described above, the combination of the X direction beam 200 and the Y direction beam 300 allows the mounting head 100 to freely move in the X direction and the Y direction within a horizontal plane. The mounting head 100 is moved to a component supply unit (not shown) by a combination of movement in the X direction and the Y direction, sucks the electronic component by the nozzle, and is further conveyed to the mounting position (illustrated). (Omitted) The electronic component is mounted at a predetermined position on the printed circuit board by moving to a predetermined position.

  In order to drive such an electronic component mounting apparatus, it is necessary to supply power to the mounting head 100 or the like. Conventionally, power is supplied to the mounting head 100 from an external power source via a cable. At this time, the direct feeding means such as a cable and a slip ring can move within the movable range of the mounting head 100 in the X direction. Is installed with a cable bear (registered trademark) 210 (for example, Patent Document 1).

  However, these power supply methods cannot completely eliminate wear and disconnection. When a cable bear (registered trademark) is installed for each mounting head, the movable range of the mounting head in the XY direction is limited. It was a factor. Therefore, in order to improve the mounting efficiency, even if a plurality of mounting heads are mounted on one X-direction beam, a sufficient movable range of each mounting head cannot be ensured. It was difficult to mount a plurality of mounting heads on the X direction beam.

  Such a power supply problem is not limited to the electronic component mounting apparatus, and is a problem common to work machines in which the work head moves along the guide beam.

  For these reasons, in recent years, attempts have been made to apply a non-contact power feeding mechanism to the above-described work machine, and Patent Document 2 discloses a non-contact power feeding device for that purpose.

  As shown in the paragraph 0026 and FIG. 5, the non-contact power feeding device of Patent Document 2 includes a plurality of disk-shaped power transmission electrodes and a single sheet formed to have substantially the same diameter as the power transmission electrodes. And a power receiving electrode. As described above, in the non-contact power feeding device of Patent Document 2, the power transmission electrodes are not continuous in the moving direction of the component sampling head which is the work head, and are provided at intervals. However, since the power transmission electrode is not continuous in the direction of movement of the work head, the efficiency of power transmission is reduced in a region where the power transmission electrode is not provided when the work head moves, and stable power transmission can be performed. Can not.

JP 2008-243839 A JP2013-62924A

  The problem to be solved by the present invention is to enable stable power transmission to a work head in a non-contact manner in a work machine in which the work head moves along a linear guide beam. .

  According to an aspect of the present invention, in a work machine in which a work head moves along a linear guide beam, a power transmission electrode is continuously provided along the guard beam on the guide beam side, and the work head side Provided with a power receiving electrode opposed to the power transmitting electrode, and electric power is transmitted from the power transmitting electrode to the power receiving electrode by an electric field coupling method.

  In the present invention, the power transmission electrode and the power reception electrode are preferably disposed so as to be opposed to each other so as to increase the electric field coupling capacity, and the power transmission electrode is provided integrally with the guide beam. preferable.

  In the present invention, electric power is transmitted from the power transmitting electrode continuously along the guard beam to the power receiving electrode provided on the work head side by the electric field coupling method. That is, even if the working head moves along the guide beam, the power transmission electrode and the power receiving electrode always face each other, so that power transmission to the working head can be stably performed without contact.

  In addition, if the power transmitting electrode and the power receiving electrode are arranged so as to face each other in a nested manner, the electrode area that effectively acts in the electric field coupling method can be increased, so that a large amount of power can be transmitted in a compact shape. Can do.

  Furthermore, when the power transmission electrode is provided integrally with the guide beam, the apparatus can be downsized as compared with the case where the power transmission electrode is provided independently. In general, the guide beam for guiding the work head is assembled with high accuracy in the positional relationship with the work head side. Therefore, when the power transmission electrode is provided integrally with the guide beam, the distance (gap) between the power transmission electrode and the power reception electrode can be maintained with high accuracy. Then, it becomes easy to reduce the distance between electrodes, and the power transmission efficiency by the electric field coupling method can be improved.

It is a conceptual diagram which shows the basic composition of the electronic component mounting apparatus to which this invention is applied. It is explanatory drawing which shows notionally an example of the structure for transmitting electric power to a working head in this invention. 3 shows an equivalent circuit of the power transmission system of FIG. It is sectional drawing which shows notionally the example which provided the power transmission electrode in the guide beam integrally in this invention. It is a conceptual diagram which shows the basic composition of the conventional electronic component mounting apparatus.

  Embodiments of the present invention will be described below based on examples in which the present invention is applied to an electronic component mounting apparatus.

  FIG. 1 is a conceptual diagram showing a basic configuration of an electronic component mounting apparatus. The electronic component mounting apparatus has a mounting head 10 for sucking electronic components and mounting them on a printed board. One or a plurality of nozzles 11 are incorporated in the mounting head 10 so as to be movable in the Z direction orthogonal to the X direction and the Y direction, that is, movable up and down.

  In the electronic component mounting apparatus of FIG. 1, three mounting heads 10 are mounted on one X direction beam 20 as a linear guide beam so as to be movable in the X direction along the X direction beam 20. . The types of these three mounting heads may be known ones such as a rotary type or linear type having a plurality of nozzles, or one having a single nozzle, and three mounting heads. 10 can be a combination of a plurality of types, or all the same type. These mounting heads 10 move freely along the X-direction beam 20 according to a known optimized program while avoiding collision and interference with adjacent mounting heads.

  The X-direction beam 20 is bridged between a pair of (two) Y-direction beams 30 orthogonal to the X-direction beam and arranged at a predetermined interval in the X direction, and moves along the Y direction to the Y-direction beam 30. It is attached as possible. As described above, the combination of the X direction beam 20 and the Y direction beam 30 allows the mounting head 10 to freely move in the X direction and the Y direction within a horizontal plane. The mounting head 10 moves to a component supply unit (not shown) by a combination of movement in the X direction and the Y direction, sucks the electronic component by the nozzle 11, and is further transported to the mounting position ( The electronic component is mounted at a predetermined position on the printed board by moving to a predetermined position on the printed board.

  In FIG. 1, only one X-direction beam is shown, but as shown in FIG. 5, a pair (two) of X-direction beams 20 are bridged between the Y-direction beams 30 so that each X-direction beam 20 has one. Alternatively, a plurality of mounting heads 10 can be mounted. 1 shows an example in which three mounting heads 10 are mounted on one X-direction beam 20, but the present invention is not limited to this. In the present invention, one X as a linear guide beam is shown. One or a plurality of mounting heads 10 can be mounted on the direction beam 20 so as to be movable along the X direction beam 20 in the X direction. Further, the Y-direction beams 30 are not limited to a pair (two), but may be one. In this case, it is possible to adopt various forms such as providing a support by a guide rail on one side for assistance.

  FIG. 2 is an explanatory diagram conceptually showing an example of a configuration for transmitting power to the mounting head 10 in the present invention. As shown in FIG. 2, a pair of power transmission electrodes 21 are continuously provided along the X direction beam 20 on the X direction beam 20 side, and a pair of power reception electrodes 12 facing the power transmission electrode 21 are provided on the mounting head 10 side. It has been. Then, power is transmitted from the power transmission electrode 21 to the power reception electrode 12 by the electric field coupling method. The power transmission system of FIG. 2 can be represented by the equivalent circuit shown in FIG. That is, electric power is transmitted from the power transmitting electrode 21 to the power receiving electrode 12 by electric field coupling between the power transmitting electrode 21 and the power receiving electrode 12, and the mounting head 10 is driven by the power.

  In the example of FIG. 2, the power transmission electrode 21 and the power reception electrode 12 face each other in a nested manner. Specifically, the power transmission electrode 21 and the power reception electrode 12 are each formed in a comb-teeth shape, and are combined so as to mesh with each other. As described above, the power transmitting electrode 21 and the power receiving electrode 12 may be formed in a comb-teeth shape, or may be combined in a sawtooth shape or a wave shape so as to mesh with each other. In short, the power transmission electrode 21 and the power reception electrode 12 may be nested and face each other. With such a configuration, the electrode area that effectively acts in the electric field coupling method can be increased, so that a large amount of power can be transmitted in a compact shape.

  In the example of FIG. 2, the comb-like (nested) power transmission electrode 21 and the power reception electrode 12 are arranged in the horizontal direction, but may be arranged in the vertical direction. However, when arranged in the vertical direction, foreign matter is likely to fall between the transmitting electrode 21 and the receiving electrode 12 facing each other, so that it is preferable to arrange in the horizontal direction as in the example of FIG.

  In the above example, the power transmission electrode 21 is provided independently of the X direction beam 20, but the power transmission electrode 21 can be provided integrally with the X direction beam 20.

  FIG. 4 is a sectional view conceptually showing an example thereof. In the example of FIG. 4, the mounting head 10 is attached to the X direction beam 20 via a linear guide 13 having a cylindrical bearing 13a so as to be movable along the longitudinal direction (X direction). In other words, the mounting head 10 moves freely in the X direction while always maintaining a certain distance from the X direction beam 20. The configuration of the linear guide is not limited to the example shown in FIG. 4, and various forms can be adopted.

  In such a configuration, the power transmission electrode 21 is provided integrally with the X-direction beam 20 on the side facing the linear guide 13 of the X-direction beam 20, and the linear guide 13 provided integrally with the mounting head 10. Further, the power receiving electrode 12 facing the power transmitting electrode 21 is provided.

  Thus, when the power transmission electrode 21 is provided integrally with the X-direction beam 20, it is possible to reduce the size of the apparatus as compared with the case where the power transmission electrode 21 is provided independently as shown in FIG. Since the linear guide 13 is originally assembled with an error of several tens of μm or less with respect to the X-direction beam 20, the power transmission electrode 21 is provided integrally with the X-direction beam 20, and the power reception electrode 12 is connected to the linear guide 13. By providing them integrally, the inter-electrode distance (gap) between the power transmitting electrode 21 and the power receiving electrode 12 can be maintained with high accuracy. Then, it becomes easy to reduce the distance between electrodes, and the power transmission efficiency by the electric field coupling method can be improved.

  The present invention is applicable not only to an electronic component mounting apparatus but also to a work machine in which a work head moves along a guide beam, such as a welding apparatus in which a welding head moves along a guide beam.

10 Mounting head (working head)
11 Nozzle 12 Power receiving electrode 13 Linear guide 13a Bearing 20 X direction beam (guide beam)
21 Transmission electrode 30 Y direction beam

Claims (3)

In a work machine in which a work head moves along a linear guide beam,
While providing a power transmission electrode continuously along the guard beam on the guide beam side, providing a power reception electrode facing the power transmission electrode on the working head side,
A working machine that transmits electric power from the power transmitting electrode to the power receiving electrode by an electric field coupling method.   The work machine according to claim 1, wherein the power transmission electrode and the power reception electrode face each other in a nested manner.   The work machine according to claim 1, wherein the power transmission electrode is provided integrally with the guide beam.

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