JP2018201026A - Direct-acting device and electronic component-mounted apparatus - Google Patents

Abstract

To provide a direct-acting device that comprises a beam capable of being easily processed while using a carbon fiber-reinforced resin, and an electronic component-mounted apparatus comprising the direct-acting device.SOLUTION: A first direct-acting mechanism 8 (direct-acting device) includes: a beam 13 slender in one horizontal direction; a guide member 17 that is provided for the beam 13 by being drawn in one direction; a movement member 18 that is provided to be freely movable along the guide member 17; and a linear motor 19 (movement means) for moving the movement member 18. The beam 13 comprises a metal cylindrical body 14 in which openings 15a, 15b, 15c and 15d penetrating in one direction are formed, and a cylindrical reinforcement part 16 that is made of a carbon fiber-reinforced resin and formed in the state of closely adhering to an inner surface of the cylindrical body 14.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a linear motion device in which a slider can be moved in a beam extending direction, and an electronic component mounting apparatus including the linear motion device.

  In the electronic component mounting field, an electronic component mounting apparatus that mounts a component on a board using a mounting head that can move in a horizontal direction by a linear motion device is widely known. As a linear motion device, a beam made of metal (for example, iron or aluminum) extending in one horizontal direction is provided, and a mounting head is moved along the beam by driving a moving mechanism such as a linear motor or a feed screw mechanism. The thing of composition is used.

  In recent years, there has been a demand for high-speed mounting head movement and high positioning accuracy for the purpose of improving productivity and mounting quality, and beam rigidity and weight reduction are progressing to meet these requirements. As an example, a beam composed of CFRP (Carbon Fiber Reinforce Plastic) formed in a cylindrical shape has been proposed (see, for example, Patent Documents 1 and 2). CFRP is a composite material obtained by impregnating a carbon fiber with a polymer material such as an epoxy resin and then curing it. This CFRP is excellent in strength and has a remarkably smaller specific gravity than metals such as iron and aluminum, and is therefore suitable as a beam material for the purpose of solving the above problems.

JP 2008-108949 A JP 2013-206934 A

  However, since the cost of CFRP is high, it is not realistic to form the entire beam with this material. In addition, it is necessary to fix a metal guide member, which is a component part of the linear motion device, to the beam with a screw or the like, but CFRP is difficult to drill and tap to form a screw hole, and further processing is performed. For this reason, a special tool is also required, which has been a factor in further cost increase.

  Therefore, an object of the present invention is to provide a linear motion device including a beam that is easy to process while using a carbon fiber reinforced resin, and an electronic component mounting device including the linear motion device.

  The linear motion device of the present invention includes a beam elongated in one horizontal direction, a guide member provided to the beam extending in the one direction, a moving member provided movably along the guide member, A linear motion mechanism having a moving means for moving the moving member, wherein the beam is formed of a metal cylindrical body having a plurality of openings penetrating in the one direction, and a carbon fiber reinforced resin sheet is the opening; A cylindrical reinforcing portion made of carbon fiber reinforced resin formed in close contact with the inner surface of the portion by an internal pressure molding method, and the cylindrical reinforcing portion is formed in all or part of the opening.

  An electronic component mounting apparatus according to the present invention includes a beam elongated in one horizontal direction, a guide member provided by extending the beam in the one direction, and a moving member provided movably along the guide member. XY constituted by a first linear motion mechanism having a moving means for moving the moving member, and a second linear motion mechanism for moving the first linear motion mechanism in a horizontal direction orthogonal to the one direction. A moving mechanism and a mounting head mounted on the moving member are provided, the mounting head holding an electronic component is positioned on the substrate by the XY moving mechanism, and the electronic component is mounted on the substrate by the positioned mounting head In the electronic component mounting apparatus, the beam includes a metal cylindrical body having a plurality of openings penetrating in the one direction, and a carbon fiber reinforced resin sheet on an inner surface of the opening. Comprising a cylindrical reinforcing portion made of carbon fiber reinforced resin formed in close contact by molding method, the cylindrical reinforcement part is formed in the opening of all or part.

  According to the present invention, it is possible to realize a beam that can be easily processed while using a carbon fiber reinforced resin.

The perspective view of the electronic component mounting apparatus in Embodiment 1 of this invention Structure explanatory drawing of the 1st linear motion mechanism with which the electronic component mounting apparatus in Embodiment 1 of this invention was equipped. (A) (b) Structure explanatory drawing which fixes the guide member and beam which comprise the 1st linear motion mechanism with which the electronic component mounting apparatus in Embodiment 1 of this invention was equipped (A) (b) Explanatory drawing of the structure which fixes the stator and beam which comprise the 1st linear motion mechanism with which the electronic component mounting apparatus in Embodiment 1 of this invention was equipped. Structure explanatory drawing of the 1st linear motion mechanism with which the electronic component mounting apparatus in Embodiment 2 of this invention was equipped. Explanatory drawing of the structure which fixes the stator and beam which comprise the 1st linear motion mechanism with which the electronic component mounting apparatus in Embodiment 2 of this invention was equipped.

(Embodiment 1)
First, an electronic component mounting apparatus 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. The electronic component mounting apparatus 1 has a function of mounting the electronic component 3 (FIG. 2) on the substrate 2. Hereinafter, the conveyance direction of the substrate 2 is defined as the X direction, and the direction orthogonal to the X direction in the horizontal plane is defined as the Y direction.

  A substrate transport mechanism 5 having a pair of transport conveyors extending in the X direction is provided at the center of the base 4. The substrate transport mechanism 5 transports the substrate 2 and positions it at a predetermined mounting work position. On both sides of the substrate transport mechanism 5, component supply units 6 are respectively arranged. The component supply unit 6 includes a carriage 7a disposed on both sides of the base 4 and a plurality of tape feeders 7b attached to the carriage 7a. The tape feeder 7b pitches a carrier tape (not shown) holding the electronic component 3 to supply the electronic component 3 to a component take-out position by a mounting head 11 described later.

  A first linear motion mechanism 8 (linear motion device) is provided above the base 4. The first linear motion mechanism 8 is supported via a joint bracket 10 on Y-axis moving tables 9 provided on both sides of the base 4 in the X direction. The Y-axis moving table 9 is provided with a linear drive mechanism, and has a guide member 9a extending in the Y direction. A slider provided in the joint bracket 10 is mounted on the guide member 9a so as to be movable in the Y direction. The Y-axis movement table 9 is a second linear motion mechanism that moves the first linear motion mechanism 8 in a horizontal direction (Y direction) orthogonal to one direction (X direction).

  A mounting head 11 is mounted on the first linear motion mechanism 8 so as to be movable in the X direction. The first linear motion mechanism 8 and the second linear motion mechanism constitute an XY movement mechanism that moves the mounting head 11 in the X direction and the Y direction. The mounting head 11 includes a suction nozzle 12 (FIG. 2). The mounting head 11 picks up and picks up the electronic component 3 supplied up to the component pick-up position by the suction nozzle 12. The XY moving mechanism positions the mounting head 11 holding the electronic component 3 with respect to the substrate 2. Thereafter, the mounting head 11 mounts the electronic component 3 on the substrate 2. As described above, the electronic component mounting apparatus 1 positions the mounting head 11 holding the electronic component 3 on the substrate 2 by the XY moving mechanism, and mounts the electronic component 3 on the substrate by the positioned mounting head 11.

  Next, the structure of the first linear motion mechanism 8 will be described with reference to FIG. The first linear movement mechanism 8 moves along the elongated beam 13 extended in one horizontal direction (X direction in FIGS. 1 and 2), a guide member 17 attached to the beam 13, and the guide member 17. A movable member 18 provided freely and a linear motor 19 for moving the movable member 18 are provided. The beam 13 includes a metallic cylindrical body 14 and a cylindrical reinforcing portion 16 that reinforces the metallic cylindrical body 14. The cylindrical body 14 has a cylindrical shape elongated in the X direction, and includes a first opening 15a, a second opening 15b, a third opening 15c, and a fourth opening 15d penetrating in the X direction. . The cylindrical body 14 has a substantially U-shaped cross section. The cylindrical body 14 is made of metal, and is made of, for example, iron or aluminum.

  The openings 15 a to 15 d are formed for the purpose of reducing the weight of the beam 13. In the first embodiment, the first opening 15a and the second opening 15b are formed at positions aligned in the vertical direction. The third opening portion 15c and the fourth opening portion 15d are respectively formed at upper and lower positions extending in the horizontal direction in the substantially U-shaped cylindrical body 14. The first opening 15a and the second opening 15b, and the third opening 15c and the fourth opening 15d are set to have substantially the same opening area. Furthermore, the opening area of the first opening 15a and the second opening 15b is set larger than that of the third opening 15c and the fourth opening 15d. In addition, although the cylindrical body 14 of this Embodiment 1 is provided with four opening parts, the number of opening parts is not limited to this, For example, one piece may be sufficient.

  Next, the cylindrical reinforcement part 16 is demonstrated. The tubular reinforcing portion 16 is formed in close contact with the inner surface 14 a of the tubular body 14. The cylindrical reinforcement part 16 is formed of carbon fiber reinforced resin. Carbon fiber reinforced resin (CFRP) is known as a material that is excellent in strength and has a significantly lower specific gravity than metals such as iron and aluminum. By making the cylindrical reinforcement part 16 into carbon fiber reinforced resin, the weight increase by the cylindrical reinforcement part 16 can be suppressed low. Further, the cylindrical body 14 can be reduced in thickness by the amount of reinforcement to reduce the metal having a large specific gravity, and a weight reduction significantly exceeding the weight increase by the cylindrical reinforcing portion 16 can be realized. As a result, the beam 13 as a whole can be significantly reduced in weight while achieving rigidity equal to or higher than that of a conventional metal beam.

  The cylindrical reinforcing portion 16 is formed by an internal pressure forming method. The internal pressure molding method is a method of arranging a carbon fiber reinforced resin sheet on the inner surface 14a by arranging the carbon fiber reinforced resin sheet around the outer periphery of the core material along the inner surface 14a of the cylindrical body 14 and thermally expanding the core material by heat treatment. In this method, the carbon fiber reinforced resin sheet is heat cured and formed into a cylindrical shape. Thereby, the cylindrical reinforcement part 16 closely_contact | adhered to the inner surface 14a can be formed. Ideally, the cylindrical reinforcing portion 16 is in close contact with the entire inner surface 14a, but even if a portion that is not in close contact remains due to manufacturing reasons, if the majority of the inner surface 14a is in close contact, the desired rigidity is not impaired. .

  In addition, although the example which formed the cylindrical reinforcement part 16 in the inner surface 14a corresponding to all the opening parts 15a-15d was demonstrated in this Embodiment 1, it is made to form only in the inner surface 14a of a required opening part. Good. Since the carbon fiber reinforced resin is expensive, the manufacturing cost can be reduced by forming the cylindrical reinforcing portion 16 only in a predetermined opening. For example, the third opening portion 15c and the fourth opening portion 15d have a small area, and even if the cylindrical reinforcing portion 16 is provided there, it is considered that the contribution to improving the rigidity of the beam 13 is low. Therefore, the cylindrical reinforcing portion 16 is formed only on the inner surface 14a corresponding to the first opening portion 15a and the second opening portion 15b having a relatively large opening area so that both rigidity enhancement and economy can be achieved. Good.

  The story is returned to the cylindrical body 14 again. The cylindrical body 14 is generally reduced in thickness (thickness) for weight reduction, but is provided with a thick portion 14b that is partially increased in thickness for convenience of assembly and machining. That is, the cylindrical body 14 has a thin part and a thick part 14b. In FIG. 2, only the thick portion 14b is indicated by a broken line. The cylindrical body 14 according to the first embodiment is on the mounting side of the mounting head 11 and has a first thick portion 14b1 at the positions of the upper and lower ends of the substantially U-shape extending in the horizontal direction. The second thick portion 14b2 is provided. The cylindrical body 14 is on the mounting side of the mounting head 11 and has a third thick portion 14b3 at a substantially intermediate position (position between the first opening 15a and the second opening 15b). Have. In addition, the cylindrical body 14 has the fourth thick part 14b4, the fifth thick part 14b5, the sixth thick part 14b6, the seventh thick part 14b7, and the eighth thick part at desired positions. It has a portion 14b8 and a ninth thick portion 14b9. In the thick portions 14b1 to 14b9, screw holes for attaching various members described below to the beam 13 are formed through processes such as drilling and tapping.

  In the cylindrical body 14, a metal guide member 17 is mounted in parallel to one direction (longitudinal direction of the beam 13) at positions corresponding to the first thick portion 14 b 1 and the second thick portion 14 b 2. Yes. A slider 18 a is provided on the guide member 17 so as to be movable in the X direction along the guide member 17. A flat plate member 18b is fixed to the slider 18a. The slider 18a and the plate member 18b constitute a moving member 18, and the mounting head 11 is mounted on the moving member 18.

  Next, a linear drive mechanism (moving means) that moves the mounting head 11 in the X direction will be described. The linear drive mechanism includes a stator 20 provided on the beam 13 side and a mover 21 provided on the mounting head 11 side. The stator 20 is mounted at a position corresponding to the third thick portion 14b3 of the cylindrical body 14. The stator 20 includes a flat iron plate member 22 parallel to the guide member 17 and a magnet member 23 disposed on the surface of the iron plate member 22. On the other hand, the mover 21 is attached to the plate member 18b. The mover 21 has a substantially U-shaped cross section, and surrounds the stator 20 with a slight gap. When electricity is passed through a coil built in the mover 21 to generate a magnetic flux, a propulsive force is generated in the mover 21 by a pulling force acting between the magnet member 23. The mounting head 11 moves along the guide member 17 using this propulsive force. The stator 20 and the mover 21 constitute a linear motor 19 and serve as moving means for moving the moving member 18 in the X direction. The moving means may be other than a linear motor, for example, using a feed screw or a belt. Thus, the first linear motion mechanism 8 includes the beam 13, the guide member 17, the moving member 18, and the moving means.

  Next, a structure for fixing the guide member 17 to the beam 13 will be described with reference to FIGS. FIG. 3 shows only the first thick portion 14b1, but the same applies to the second thick portion 14b2. In FIG. 3A, a screw hole 24 having a screw groove is formed in the first thick portion 14b1 through processes such as drilling and tapping. Since the cylindrical body 14 is made of metal, tapping or the like can be easily performed. In FIG. 3A, the bottom A of the screw hole 24 does not reach (penetrate) to the cylindrical reinforcing portion 16 of the adjacent third opening 15c. That is, the screw hole 24 is bottomed. The same is true between the screw hole 24 on the second thick portion 14b2 side and the cylindrical reinforcing portion 16 of the fourth opening 15d.

  In FIG. 3B, the guide member 17 is formed with an insertion hole 17 a for inserting the first screw member 25. The guide member 17 is fixed to the cylindrical body 14 by screwing the first screw member 25 into the screw hole 24 through the insertion hole 17a.

  Next, a structure for fixing the stator 20 to the beam 13 will be described with reference to FIG. A screw hole 26 having a screw groove is formed in the third thick part 14b3. In FIG. 4A, the bottom B of the screw hole 26 is set at a position avoiding the first opening 15a and the second opening 15b. That is, the screw hole 26 is also bottomed and does not reach any cylindrical reinforcing portion 16. A concave portion 14c having a width corresponding to the thickness t (FIG. 4B) of the iron plate member 22 is formed on the surface of the cylindrical body 14 at a position corresponding to the third thick portion 14b3. ing.

  In FIG. 4B, an insertion hole 22 a for inserting the second screw member 27 is formed inside the iron plate member 22. The stator 20 is fixed to the cylindrical body 14 by fitting the front end of the iron plate member 22 into the recess 14c and screwing the second screw member 27 into the screw hole 26 through the insertion hole 22a in this state. .

  Next, a structure for fixing the first linear motion mechanism 8 to the joint bracket 10 will be described with reference to FIG. In the cylindrical body 14, screw holes 28 are respectively formed at positions corresponding to the fourth thick portion 14b4 to the ninth thick portion 14b9. In the joint bracket 10, an insertion hole for inserting a third screw member (not shown) is formed at a position corresponding to the fourth thick portion 14b4 to the ninth thick portion 14b9. The first linear motion mechanism 8 is fixed to the joint bracket 10 by screwing the third screw member into the screw hole 28 through the insertion hole of the joint bracket 10.

  As described above, in the beam 13 according to the first embodiment, the cylindrical reinforcing portion 16 made of carbon fiber reinforced resin is formed in close contact with the inner surface 14 a of the metallic cylindrical body 14. Thereby, the beam 13 which can perform the process for forming a screw hole easily, using the cylindrical reinforcement part 16 is realizable. The cylindrical body 14 may be subjected to various types of processing other than tapping.

(Embodiment 2)
Next, the first linear motion mechanism 8A in the second embodiment of the present invention will be described with reference to FIG. Members common to the first linear motion mechanism 8 in the first embodiment are denoted by the same reference numerals (or “A” to the same reference numerals), and description thereof is omitted. The second embodiment is different from the first embodiment in the configuration of the moving means.

  In FIG. 5, the beam 13A is formed in a state in which the cross-sectional shape having openings 15Aa to 15Ad penetrating in the X direction is in close contact with the substantially U-shaped cylindrical body 14A and the inner surface 14Aa of the cylindrical body 14A. A cylindrical reinforcing portion 16A made of carbon fiber reinforced resin is provided. In the cylindrical body 14A, a stator 20A constituting the linear motor 19A is mounted at a position between the upper part and the lower part extending on the mounting head 11 and extending in the horizontal direction. Further, a movable element 21A constituting the linear motor 19A is mounted at a position of the plate member 18b facing the stator 20A. The principle of moving the moving member 18 in the X direction is as described in the first embodiment.

  The cylindrical body 14A has a first thick part 14Ab1 and a second thick part 14Ab2 on the mounting side of the mounting head 11 and at respective positions sandwiching the stator 20A in the vertical direction.

  Next, a structure for fixing the stator 20A to the beam 13A will be described with reference to FIG. FIG. 6 shows only the first thick part 14Ab1, but the same applies to the second thick part 14Ab2. A screw hole 29 having a screw groove is formed in the first thick part 14Ab1. The bottom portion C of the screw hole 29 does not reach the cylindrical reinforcing portion 16A of the adjacent first opening 15Aa. That is, the screw hole 29 is bottomed. The same is true between the screw hole 29 on the second thick portion 14Ab2 side and the cylindrical reinforcing portion 16A of the second opening 15Ab.

  The stator 20A is fixed to the beam 13A via a plate member 30 that extends along the longitudinal direction of the cylindrical body 14A. An insertion hole 30a for inserting the fourth screw member 31 is formed at a position corresponding to the first thick portion 14Ab1 of the plate member 30. The stator 20A is fixed to the beam 13A via the plate member 30 by screwing the fourth screw member 31 into the screw hole 29 via the insertion hole 30a. The same applies to the second thick portion 14Ab2 side. Also in the second embodiment, it is possible to easily perform processing for forming a screw hole or the like while using the cylindrical reinforcing portion 16A made of carbon fiber reinforced resin.

  The linear motion device and the electronic component mounting device of the present invention are not limited to those described in the first and second embodiments, and can be changed without departing from the spirit of the invention. In addition, the screw hole should just be formed in order to fix a guide member to a cylindrical body at least.

  ADVANTAGE OF THE INVENTION According to this invention, the beam which is easy to process can be implement | achieved using carbon fiber reinforced resin, and it is useful in the electronic component mounting field | area.

DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 2 Board | substrate 3 Electronic component 8 1st linear motion mechanism (linear motion apparatus)
9 Y-axis movement table (second linear motion mechanism)
11 Mounting head 13, 13A Beam 14, 14A Tubular body 14a, 14Aa Inner surface 14b (14b1, 14b2, 14b3, 14b4, 14b5, 14b6, 14b7, 14b8, 14b9), 14Ab1, 14Ab2 Thick parts 15a, 15b, 15c, 15d, 15Aa, 15Ab, 15Ac, 15Ad
Opening 16, 16A Cylindrical reinforcement 17 Guide member 18 Moving member 19, 19A Linear motor 24, 26, 28, 29 Screw hole 25 First screw member 27 Second screw member 31 Fourth screw member

Claims (4)

An elongate beam in one horizontal direction, a guide member provided extending in the one direction on the beam, a moving member provided movably along the guide member, and a moving means for moving the moving member A linear motion mechanism having
The beam is formed of a metal cylindrical body having a plurality of openings that penetrate in the one direction and a carbon fiber reinforced resin sheet formed in close contact with the inner surface of the opening by an internal pressure molding method. It has a cylindrical reinforcement made of fiber reinforced resin,
The linear motion device, wherein the cylindrical reinforcing portion is formed in all or a part of the opening. The cylindrical body has a thick part and a thin part formed by extending in the one direction,
The linear motion device according to claim 1, wherein a screw hole for fixing the guide member to the cylindrical body is formed in the thick portion at least by a screw member. An elongate beam in one horizontal direction, a guide member provided extending in the one direction on the beam, a moving member provided movably along the guide member, and a moving means for moving the moving member An XY moving mechanism configured by a first linear motion mechanism having a second linear motion mechanism that moves the first linear motion mechanism in a horizontal direction orthogonal to the one direction; Mounted mounting head,
An electronic component mounting apparatus that positions the mounting head holding an electronic component on a substrate by the XY moving mechanism, and mounts the electronic component on the substrate by the positioned mounting head,
The beam is formed of a metal cylindrical body having a plurality of openings that penetrate in the one direction and a carbon fiber reinforced resin sheet formed in close contact with the inner surface of the opening by an internal pressure molding method. It has a cylindrical reinforcement made of fiber reinforced resin,
2. The electronic component mounting apparatus according to claim 1, wherein the cylindrical reinforcing portion is formed in all or part of the opening. The cylindrical body has a thick part and a thin part formed by extending in the one direction,
4. The electronic component mounting apparatus according to claim 3, wherein a screw hole for fixing the guide member to the cylindrical body is formed in the thick portion by at least a screw member.

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