JP2019216209A - Component mounting device - Google Patents

Abstract

To provide a component mounting device that can prevent a reduction in the accuracy of the mounting position of a component on a substrate.SOLUTION: A component mounting device 10 mounts a component on a substrate P, and comprises: a mounting head 20; first beams 30 that support the mounting head 20 movably in a first direction; and second beams 60 that support the first beams 30 movably in a second direction different from the first direction. The second beams 60 have urging means 50 that fix one ends of the first beams 30 and allow movement of the other ends of the first beams 30 for the first direction, and can urge the other ends of the first beams 30 in a direction along the first direction.SELECTED DRAWING: Figure 3

Description

  This specification discloses a technique relating to a component mounting apparatus.

  2. Description of the Related Art Conventionally, a component mounting apparatus that mounts components on a substrate has been known. Patent Document 1 discloses a pair of Y linear guides fixed on a base, a pair of slide blocks movably supported with respect to a pair of Y linear guides, and an electronic component mounting head movable in the X direction. And an X linear guide supported on the X-ray guide. The X linear guide is supported by a beam-shaped X frame. One end of the X frame is fixed to one slide block, and the other end of the X frame slides in the X direction with respect to the other slide block. It is movably supported. When the X frame expands due to a temperature change, the other end of the X frame slides with respect to the slide block, thereby preventing the X frame from bending.

JP-A-2002-94295

  By the way, in the configuration of Patent Document 1, since the other end of the X frame is slidable in the X direction with respect to the slide block, the position of the other end of the X frame is not held, and the electronic component mounting head is not held. Therefore, there is a concern that the mounting position accuracy of the electronic component may be reduced due to the above.

  The technology described in the present specification has been completed based on the above-described circumstances, and provides a component mounting apparatus capable of suppressing a decrease in mounting position accuracy of components on a substrate. With the goal.

  The technology described in the present specification is a component mounting apparatus that mounts a component on a substrate, comprising: a mounting head; a first beam that movably supports the mounting head in a first direction; A second beam movably supported in a second direction different from the first direction, wherein the second beam fixes one end of the first beam in the first direction, There is provided urging means which permits movement of the other end of one beam and urges the other end of the first beam in a direction along the first direction.

  According to this configuration, since the other end of the first beam is urged by the urging means in the direction along the first direction, the length of the first beam is changed by the temperature change as compared with the case where there is no urging means. , The displacement and vibration of the mounting head supported by the first beam can be suppressed. Therefore, it is possible to suppress a decrease in the mounting position accuracy of the electronic component on the substrate by the mounting head. In addition, since the urging means urges the other end of the first beam to increase the rigidity of the first beam, it is possible to suppress the fluctuation of the other end of the first beam.

The following embodiments are preferable as embodiments of the technology described in this specification.
The urging unit urges the first beam to the opposite side from the one end with respect to the other end.
With this configuration, it is possible to quickly converge the displacement of the other end of the first beam due to the thermal expansion of the first beam caused by the temperature rise.

A regulating member for regulating movement of the first beam urged by the urging means on the other end side;
With this configuration, since the vibration convergence time of the first beam urged by the urging means can be shortened by the regulating member, the accuracy of the mounting position of the electronic component on the substrate can be improved. Further, the rigidity of the first beam can be increased by the restricting member.

An acquisition unit capable of acquiring information on the extension of the first beam is provided, and a release unit configured to release the regulation of the regulation member according to the information acquired by the acquisition unit is provided.
With this configuration, it is possible to suppress a problem caused by thermal expansion due to a temperature change when the regulating member regulates movement of the other end of the first beam.

The urging means includes an elastic body that can be elastically deformed.
This makes it possible to urge the other end of the first beam with a simple configuration.

  According to the technology described in this specification, it is possible to suppress a decrease in accuracy of the mounting position of a component on a substrate.

FIG. 2 is a plan view showing the surface mounter of the first embodiment. Perspective view showing the surface mounter body FIG. 4 is a cross-sectional view of a part of an XZ plane in which the other end of the X beam in the surface mounter body is enlarged. FIG. 4 is a cross-sectional view of a part of a YZ plane in which the other end of the X beam in the surface mounter body is enlarged. Sectional view schematically showing the configuration of the X beam Diagram showing the electrical configuration of the surface mounter Flow chart showing the operation of the surface mounter XZ plane sectional view showing the other end side of the X beam in the surface mounter body of Embodiment 2 in an enlarged manner. Front view of the other end of the X-beam enlarged The front view which expanded the other end side of the X beam of Embodiment 3.

<Embodiment 1>
1. Overall Configuration of Surface Mounter 10 The surface mounter 10 (an example of a “component mounting apparatus”) of the present embodiment will be described with reference to FIGS. In the following description, the X direction in FIG. 2 is described as forward, the Y direction is rightward, and the Z direction is upward.

  As shown in FIG. 1, the surface mounter 10 includes a mounter main body 10A and four (plural) feeder-type supply devices 15 mounted on the mounter main body 10A. A plurality of feeders F are aligned and attached to each feeder type supply device 15. Each feeder F includes a reel around which an electronic component supply tape containing a plurality of electronic components B (an example of “components”) is wound, a motor-driven delivery device that pulls out the electronic component supply tape from the reel, and the like. The electronic components B are supplied one by one.

  As shown in FIG. 2, the mounting machine body 10A has a base 11, a transport conveyor 13, four (plural) mounting heads 20, and a length in the X direction (front-back direction; an example of "first direction"). Four X-beams 30 (an example of a “first beam”) that support each mounting head 20 so as to be movable in the X-direction and a Y-direction (a left-right direction; an example of a “second direction”) And three Y beams 60 (an example of a “second beam”) that support the four X beams 30 movably in the Y direction.

  The base 11 has a rectangular shape in plan view, and has a flat upper surface. The transport conveyor 13 is disposed at a substantially central position of the base 11 in the Y direction, and has a transport belt that is driven to rotate. When the printed board (hereinafter, “board P”) transported from one side in the transport direction (X direction) reaches the mounting position, the electronic component B is mounted on the printed board, and the electronic component B is mounted on the board P. Thereafter, the paper is unloaded from the other side in the transport direction (X direction).

  The four mounting heads 20 are for mounting the electronic component B on the substrate P by sucking the electronic component B. A plurality of suction nozzles for performing the mounting operation of the electronic component B are provided in a row. The tip of each suction nozzle sucks the electronic component B by the negative pressure, and the electronic component B sucked and held by the suction nozzle is photographed by the component recognition camera 23 (see FIG. 6) and then released by the supply of the positive pressure. You.

  The four X beams 30 are made of metal formed by, for example, aluminum die casting, and are arranged so as to straddle a plurality of Y beams 60 arranged at intervals in the X direction as shown in FIG. The mounting head 20 is movably supported in the X direction. As shown in FIG. 5, each X beam 30 includes a beam main body 30A made of a metal elongated in the X direction, and base members 31A and 31B on which both ends of the beam main body 30A in the X direction are placed. .

  One end (right end in FIG. 5) 35A (right end in FIG. 5) of the beam main body 30A is fixed to a flat base member 31A by fastening bolts BT. Since the end 35B (the left end in FIG. 5) on the other side (the left side in FIG. 5) of the beam main body 30A is not fixed to the base member 31B, the end 35B of the beam main body 30A is connected to the base member 31B. It is slidable in the X direction with respect to 31B. Thereby, when the beam main body 30A extends in the X direction (front-rear direction) due to thermal expansion due to temperature change, the position of the end 35B of the beam main body 30A moves in the X direction (the dashed line 35C in FIG. 5).

  A beam position recognition camera 87 (an example of an “acquisition unit”) capable of acquiring position information of the end 35B of the beam main body 30A is fixed to a member near the end 35B of the beam main body 30A (for example, fixed to the base member 31B). ) Has been. The beam position recognition camera 87 captures, for example, the position of the end 35B of the beam main body 30A or a mark attached to the end 35B in order to recognize the position of the end 35B, and detects the position of the end 35A of the beam main body 30A. Get location information.

  The lower surfaces of the base members 31A and 31B are both fixed to the upper surfaces of the slider portions 38A and 38B which are slidably fitted to the Y rail 61 by fixing means such as bolts (not shown). The slider portion 38A and the slider portion 38B each have a slide groove 39 formed on the lower surface side, and are both fixed to the base members 31A and 31B at intervals in the Y direction. By fitting the Y rail 61 fixed to the upper surface of the Y beam 60 into the slide groove 39, the base members 31A and 31B can be slid in the Y direction together with the slider portions 38A and 38B.

  Here, of the base members 31A and 31B, as for the base member 31B on the other side, as shown in FIGS. 3 and 4, a flat plate-like mounting portion 32 on which the end portion 35B of the beam main body 30A is mounted. A pair of left and right guide portions 33 projecting upward from the upper surface of the mounting portion 32 and extending parallel to each other in the X direction; and a pair of stoppers 54 projecting upward from the upper surface of the mounting portion 32 inside the pair of guide portions 33. A pair of stopper supporting portions 53 for supporting (an example of a “regulating member”) and an elastic body holding portion 34 projecting upward from the upper surface of the mounting portion 32 and holding the elastic body 50 are provided.

  As shown in FIG. 4, the pair of guide portions 33 are fitted into the guide receiving portions 48 of the beam main body 30A to guide the movement of the beam main body 30A in the X direction. The pair of stopper support portions 53 are arranged on the inner side of the pair of guide portions 33, and the stopper 54 is fitted through a seal ring 56 in a cylinder 55 forming a cylindrical space. The stopper 54 slides in the Y direction according to the pressure in the cylinder 55. The cylinder 55 is connected to a hose 58 connected to a pressure supply device 57 (see FIG. 6) via a joint, and can change the pressure in the cylinder 55 in accordance with the operation of the pressure supply device 57. In the present embodiment, the air pressure is supplied into the cylinder 55. However, the present invention is not limited to this. For example, a hydraulic type may be used. When the pressure in the cylinder 55 increases due to the driving of the pressure supply device 57, the pair of stoppers 54 is pushed inward, and the biased portion 49 of the beam main body 30A described later is sandwiched from both sides to thereby end 35B of the beam main body 30A. Is configured to be positioned.

  As shown in FIG. 3, the elastic body holding portion 34 has a bottomed cylindrical shape capable of holding the elastic body 50 inside, and the closed bottom portion of the elastic body holding portion 34 is connected to one end of the elastic body 50. A receiving portion 34A is provided, and the other end side of the elastic body 50 can be inserted into the opened opening 34B of the elastic body holding portion 34.

  As shown in FIG. 4, an end 35B of the beam main body 30A on the side of the base member 31B extends in the X direction and is opposed to a pair of flat plate plates 45A and 45B spaced apart in the Y direction. A flat plate-like connecting portion 46 connecting between the beam plates 45A and 45B, a frame portion 47 for reinforcing between the beam plates 45A and 45B and the connecting portion 46, and a lower portion protruding downward from an intermediate portion of the connecting portion 46 to provide elasticity. It has a flat plate-like biased portion 49 that is biased by the elastic repulsive force of the body 50, and a guide groove 48A that fits into the guide portion 33. The slide in the guide groove 48A guides the movement in the X direction. And a guide receiving portion 48.

  As illustrated in FIG. 3, the biased portion 49 is configured such that the end of the elastic body 50 abuts against a rear plate surface and is urged by the elastic repulsive force of the elastic body 50, and as illustrated in FIG. A pair of stoppers 54 are arranged at positions on both sides of the biased portion 49 facing the locked portion 49A. By moving the pair of stoppers 54 to the position where the biased portion 49 is sandwiched, the movement (displacement and vibration) of the other end 35B of the beam main body 30A is regulated. The elastic body 50 is, for example, a compression coil spring. The elastic body 50 is sandwiched between the biased portion 49 and the elastic body holding portion 34 of the Y beam 60 to generate an elastic repulsive force on the biased portion 49 and the elastic body holding portion 34. The elastic body 50 can be held by the elastic body holding section 34 so as to bias the biased section 49 at normal temperature (for example, 25 ° C.) where the length of the beam main body 30A does not change. The other end 35B of the X beam main body 30A that is not fixed to the Y beam 60 is urged in the X direction by the elastic force of the elastic body 50. The elastic modulus of the elastic body 50 is the elastic modulus that can urge the X-beam main body 30A and guide the other end 35B to a predetermined position when the length of the X-beam main body 30A changes according to the temperature change. Is done.

  The three Y beams 60 are made of metal formed by, for example, aluminum die casting, and are fixed to the front end, the center, and the rear end on the base 11 as shown in FIGS. Are arranged in parallel so that adjacent X beams 30 straddle in the Y direction. On the upper surfaces of the three Y beams 60, Y rails 61 are arranged along the Y direction. A metal frame 62 for protecting the X beam 30 from both ends in the X direction is provided over the entire width of the mounting machine main body 10A.

2. Electrical Configuration of Surface Mounter 10, as shown in FIG. 6, the surface mounter 10 includes a control unit 70 for controlling the whole in a mounter main body 10A. The control unit 70 (an example of a “release unit”) includes an arithmetic processing unit 71 including a CPU and the like, a storage unit 72, a detection processing unit 73, a motor control unit 74, an image processing unit 75, and an input / output unit 76. I have. An operation unit 78 that can be operated by the user and a display unit 79 that can be visually recognized by the user, such as a display, are provided outside the mounting machine body 10A. The arithmetic processing unit 71 is connected to the operation unit 78 and the display unit 79. Have been.

  The storage unit 72 stores a mounting program for controlling the mounting operation of the surface mounter 10. In addition, a work area for temporarily storing information when the arithmetic processing unit 71 performs various calculations is allocated.

  The motor control unit 74 controls the energization of each motor under the command of the arithmetic processing unit 71, and performs an X-axis motor 81, a Y-axis motor 82, a Z-axis motor 83, R The shaft motor 84 and a conveyor motor 85 for driving the transport conveyor 13 are electrically connected. The driving of the X-axis motor 81 moves the mounting head 20 on the X-beam 30 in the X-direction, and the driving of the Y-axis motor 82 moves the X-beam 30 on the Y-beam 60 in the Y-direction. Drives the mounting head 20 in the Z direction, and the R-axis motor 84 rotates the mounting head 20.

  The image processing unit 75 is electrically connected to the component recognition camera 23 and the beam position recognition camera 87. When the extension of the X-beam main body 30A (the displacement of the end 35A) is detected based on the recognition result of the beam position recognition camera 87 or the like, the arithmetic processing unit 71 transmits a driving signal via the input / output unit 76. Then, the pressure supply device 57 is driven, the stopper 54 is pushed out by pressurization by the air supplied from the pressure supply device 57, and after a lapse of a predetermined time, the drive of the pressure supply device 57 is stopped and the stopper 54 is returned by pressure reduction. . Sensors 88 such as a temperature sensor and a pressure supply device 57 are electrically connected to the input / output unit 76. Detection signals from the various sensors 88 are input to the detection processing unit 73 via the input / output unit 76.

3. Operation of Surface Mounter 10 When the power of the surface mounter 10 is turned on, the pressure supply device 57 is driven to supply pressure to the cylinder 55 (S1). Then, the pair of stoppers 54 in the cylinder 55 is pushed out by pressurization, and the locked portion 49A of the biased portion 49 is sandwiched between the pair of stoppers 54. Accordingly, even when the biased portion 49 is urged by the elastic force of the elastic body 50, the movement of the biased portion 49 is regulated, and the position of the end 35A of the X-beam main body 30A is fixed. .

Then, the operation of the transport conveyor 13 is started to transport the board P to the mounting position, and the mounting head 20 is operated to start mounting the electronic component B on the board P (S2).
Next, the control unit 70 determines whether or not the X-beam main body 30A has undergone elongation (displacement) due to thermal expansion (S3). In this determination, for example, it is possible to determine that the X-beam main body 30A is elongated (displaced) based on the time or the number of times the mounting of the substrate P is performed based on past experimental data. Further, for example, when the temperature detected by the temperature sensor among the sensors 88 is equal to or higher than a predetermined temperature, it may be determined that the X-beam main body 30A is elongated. Further, the position of the mark in the normal state, which is set in the X beam 30 in advance and stored in the storage unit 72, is compared with the position of the mark acquired by the beam position recognition camera 87, and the position of the compared mark is determined by a predetermined or more May be determined to be extending in the X beam main body 30A.

  The control unit 70 determines that the X-beam main body 30A has not expanded (“NO” in S3), or that the extension of the X-beam main body 30A has not reached the end of component mounting (S4). In "NO", the mounting of the electronic component B is continued (S2). On the other hand, if the X-beam main body 30A has expanded (“YES” in S3) and it is time to finish component mounting (“YES” in S4), the pressure in the cylinder 55 is released, and The fixing of the X-beam main body 30A by the pair of stoppers 54 is released (S5). Thus, the biased portion 49 is urged by the elastic force of the elastic body 50, and the position of the end 35A moves in accordance with the extension of the X-beam main body 30A.

  Until a predetermined time (small time, for example, several seconds, during which the stress caused by the elongation of the X-beam main body 30A can be eliminated) elapses ("NO" in S6), the release of the X-beam main body 30A is continued ("YES" in S5). After a lapse of a predetermined time ("YES" in S6), the pressure supply device 57 is driven to supply pressure to the cylinder 55 (S7), whereby the biased portion 49 of the X-beam main body 30A is clamped. Thereby, even when the biased portion 49 is urged by the elastic force of the elastic body 50, the movement of the biased portion 49 is restricted, and the position of the end 35A of the X-beam main body 30A is fixed again. You.

  If component mounting for the next cycle is set ("YES" in S8), component mounting is performed (S2), and if all component mounting is completed ("NO" in S8), component mounting is performed. Finish the implementation.

4. Operation and effect of the present embodiment A surface mounter 10 (component mounting apparatus) for mounting components on a substrate P, the mounting head 20 and X supporting the mounting head 20 so as to be movable in the X direction (first direction). A beam 30 (first beam); and a Y beam 60 (second beam) that movably supports the X beam 30 in a Y direction (second direction) different from the X direction. With respect to the direction, while the one end 35A side (one end side) of the X beam 30 is fixed, the movement of the other end part 35B side (the other end side) of the X beam 30 is allowed. An elastic body 50 (biasing means) capable of being biased in a direction along the X direction is provided.

  According to the present embodiment, the other end of the X beam 30 is urged by the elastic body 50 in the direction along the X direction. Can be suppressed (converged) even when the mounting head 20 supported by the X-beam 30 is displaced. Accordingly, it is possible to suppress a decrease in the mounting position accuracy of the electronic component B on the substrate P by the mounting head 20. In addition, since the rigidity of the X beam 30 is increased by biasing the other end of the X beam 30 by the elastic body 50, the fluctuation of the other end of the X beam 30 can be suppressed.

Further, the elastic body 50 urges the other end 35A side (the other end side) of the X beam 30 to the side opposite to the one end 35A side (the one end side) of the X beam 30.
In this way, the displacement of the other end 35A of the X beam 30 due to the thermal expansion of the X beam 30 due to the temperature rise can be quickly converged.

Further, a stopper 54 (restriction member) for restricting movement of the other end 35A (the other end) of the X beam 30 urged by the elastic body 50 is provided.
By doing so, the vibration convergence time of the X beam 30 urged by the elastic body 50 can be shortened by the stopper 54, so that the accuracy of the mounting position of the electronic component B on the substrate P can be improved. . Further, the rigidity of the X beam 30 can be increased by the stopper 54.

Further, a beam position recognition camera 87 (acquisition means) capable of acquiring information on the extension of the X beam 30 and sensors 88 (acquisition means) such as a temperature sensor are provided. The control unit 70 (release means) for releasing the restriction of the control 54 is provided.
In this way, when the movement of the other end portion 35A of the X beam 30 is restricted by the stopper 54, it is possible to suppress a problem due to thermal expansion due to a change in environmental temperature.

<Embodiment 2>
Next, a second embodiment will be described with reference to FIGS.
The X beam 90 of the surface mounter according to the second embodiment is different from the first embodiment in that the stopper 54 and the stopper support 53 that restrict the movement of the other end 35B of the X beam main body 30A are not provided. Other configurations are the same as those of the first embodiment, and therefore, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

<Embodiment 3>
Next, a third embodiment will be described with reference to FIG.
The guide portions 33 and the guide receiving portions 48 of the X beams 30 and 90 of the first and second embodiments are configured to fit in the vertical direction. However, the X beam 95 of the third embodiment is a pair of guides projecting in the left and right direction. The guide receiving portions 98A and 98B are fitted to the portion 97 so as to sandwich the guide receiving portions 98A and 98B from both right and left sides. Other configurations are the same as those of the above-described embodiment, and thus, the same components as those of the above-described embodiment are denoted by the same reference numerals and description thereof will be omitted.

  A linear block 96 extending in the X direction protrudes upward from the upper surface of the mounting portion 32 of the base member 31B. A pair of guide portions 97 extending in the X direction are fixed to both side surfaces of the linear block 96. Guide receiving portions 98A and 98B having guide grooves 99 extending in the X direction are fixed to the inner surfaces of the pair of left and right beam plates 45A and 45B in the X beam main body 95A. When the guide groove 99 is fitted in the guide portion 97 and the guide receiving portions 98A and 98B slide in the X direction, the X beam main body 95A is configured to be slidable in the X direction with respect to the base member 31B.

<Other embodiments>
The technology described in this specification is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the technology described in this specification.

  (1) In the above embodiment, the elastic body 50 is a compression coil spring, but is not limited thereto, and may be a spring other than the compression coil spring. For example, the urging means may be configured such that the other end 35B of the X-beam main body 30A is pulled outward from the outside of the X-beam main body 30A by using a tension coil spring. The other end in the X direction is not limited to a spring, but may be an elastic body such as rubber or a hydraulic mechanism that can adjust the pressure for urging the other end 35B of the X beam main body 30A in multiple stages. The position of the portion 35B may be adjustable in multiple stages.

(2) Although the X beams 30, 90, and 95 (X beam main bodies 30A and 95A) and the Y beam 60 have a positional relationship that is orthogonal to each other, the present invention is not limited to this.
(3) The positions, numbers, shapes, and the like of the X beams 30, 90, and 95, the Y beam 60, the mounting head 20, and the like are not limited to the configuration of the above-described embodiment, and can be appropriately changed.

10: surface mounter (component mounting device), 11: base, 13: transport conveyor, 20: mounting head, 30, 90, 95: X beam (first beam), 38: slider, 41: fastening member, 49: biased portion, 50: elastic body (biasing means), 53: stopper support portion, 54: stopper (restriction member), 55: cylinder, 57: pressure supply device, 58: hose, 60: Y beam ( 2nd beam), 61: Y rail, 70: control unit (release unit), 87: beam position recognition camera (acquisition unit), 88: sensors, P: substrate

Claims (5)

A component mounting apparatus for mounting components on a board,
A mounting head,
A first beam movably supporting the mounting head in a first direction;
A second beam that movably supports the first beam in a second direction different from the first direction,
The second beam allows movement of the other end of the first beam while fixing one end of the first beam in the first direction,
A component mounting apparatus comprising: a biasing unit capable of biasing the other end of the first beam in a direction along the first direction. The component mounting apparatus according to claim 1, wherein the urging unit urges the other end of the first beam to a side opposite to the one end. The component mounting apparatus according to claim 1, further comprising a regulating member that regulates movement of the first beam urged by the urging means toward the other end. An acquisition unit capable of acquiring information on extension of the first beam,
The component mounting apparatus according to claim 3, further comprising a release unit configured to release the regulation of the regulation member in accordance with the information acquired by the acquisition unit. The component mounting apparatus according to claim 1, wherein the urging unit includes an elastic body that can be elastically deformed.

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