JP2014072942A - Cable guide apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable guide apparatus that forcibly stops the rotation of a guide roller when a movable body is stopped.SOLUTION: A cable guide apparatus is configured to wire a cable 55 bent in an U-shape for feeding power to and/or sending and receiving a signal to and from a movable body 47 that reciprocatively moves, locate a movable side portion 55a connected to the movable body in the cable at an upper or lower position than a fixed side portion 55b, arrange a plurality of guide rollers 60 for guiding the movable side portion of the cable in a moving direction of the movable body, and comprise a rotation stop mechanism 63 that stops the rotation of the plurality of guide rollers when the movable body is stopped.

Description

  The present invention relates to a cable guide device that guides a cable that feeds power and / or transmits / receives signals to / from a reciprocating moving body by bending the cable into a U shape.

  In the component mounting machine, the mounting head holding the suction nozzle moves in the XY direction by an XY slide mechanism to suck and mount the component. Then, in order to feed power and send / receive signals to / from the mounting head, a cable in which a plurality of conductive wires are embedded is bent in a U shape to connect the XY slide mechanism side and the mounting head side. Yes. This type of cable guide device is described in Patent Document 1.

JP 2011-15525 A

  In the conventional cable guide device, the moving side of the cable moves while being guided by the guide roller in conjunction with the movement of the mounting head. As the cable moves, the guide roller that contacts the cable rotates in one direction, and as the mounting head moves in the opposite direction, the guide roller rotates in the opposite direction.

  At this time, since the cable on the moving side moves in a wave, the guide roller rotated by the movement of the cable may continue to rotate due to inertia even if the movement of the cable is stopped. For this reason, when the guide roller is reversed by the cable due to the movement of the mounting head in the reverse direction, a large frictional force is generated between the guide roller and the cable, the cable is worn, and the life is shortened.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a cable guide device that forcibly stops the rotation of the guide roller when the moving body is stopped.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a cable for feeding and / or transmitting / receiving a signal to a reciprocating moving body is bent in a U shape and wired. A moving side portion connected to the moving body is positioned above or below the fixed side portion, and a plurality of guide rollers for guiding the moving side portion of the cable are moved in the moving direction of the moving body And a rotation stopping mechanism that stops rotation of the plurality of guide rollers when the operation of the moving body is stopped.

  According to a second aspect of the present invention, in the first aspect, the rotation stopping mechanism includes a braking member that extends and retracts that extends in an arrangement direction of the plurality of guide rollers; And a brake actuator for holding the guide roller between the brake member and the cable and stopping the rotation.

  A feature of the invention according to claim 3 is that, in claim 1 or claim 2, the moving body is a mounting head for holding a suction nozzle in a component mounting machine.

  A feature of the invention according to claim 4 is that, in claim 1 or claim 2, the cable is a flat cable in which a plurality of conductive wires are covered with a strip-shaped resin.

  According to the first aspect of the present invention, since the rotation stopping mechanism that stops the rotation of the plurality of guide rollers when the operation of the moving body is stopped is provided, the rotation of the guide roller is forcibly stopped when the operation of the moving body is stopped. Is done. Thereby, even if the moving body is moved in the reverse direction after stopping, a large frictional force does not act between the guide roller and the cable, and the frictional force generated between the guide roller and the cable is reduced. Can do.

  According to the second aspect of the present invention, the rotation stopping mechanism includes a braking member that extends in the arrangement direction of the plurality of guide rollers and that can move forward and backward, and advances the braking member to move the plurality of guide rollers to the braking member and the cable. And the braking actuator that stops the rotation by sandwiching the plurality of guide rollers, the plurality of guide rollers can be accurately stopped by the operation of the braking member by the braking actuator when the operation of the moving body is stopped.

  According to the invention of claim 3, since the moving body is a mounting head that holds the suction nozzle in the component mounting machine, the wear of the cable can be reduced even with respect to the mounting head that reciprocates at high speed. Durability can be improved.

  According to the invention which concerns on Claim 4, since the cable is a flat cable which coat | covered the several conducting wire with strip | belt-shaped resin, it can improve the durability of a flat cable.

It is a perspective view of the component mounting machine which concerns on embodiment of this invention. It is a side view of a cable guide device showing an embodiment of the present invention. It is sectional drawing of the cable guide apparatus cut | disconnected along the 3-3 line of FIG. It is a block diagram of the control apparatus which controls a component mounting machine. It is a figure explaining the action | operation of a cable guide apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the component mounter 10 includes a component supply device 20, a board transfer device 30, and a component transfer device 40.

  As an example, the component supply device 20 is configured by arranging a plurality of cassette-type feeders 21 on the base 11 in the X-axis direction. The feeder 21 is detachably mounted on a pallet 22 installed on the base 11 and has a supply reel 23 wound with a tape in which a large number of electronic components are stored in a row at intervals. Although not shown in the figure, a motor serving as a drive source for pitch-feeding the tape is incorporated inside the feeder 21, and the tape is fed out one pitch at a time by this motor, and the electronic component housed in the tape is the tip of the feeder 21. The components are sequentially supplied to the component supply position provided in the unit.

  The board transport device 30 transports the circuit board B in the X-axis direction and positions and holds the circuit board B at a predetermined position. As an example, the board transport device 30 is composed of a double conveyor type having two rows of transport means 31 and 32 arranged side by side. Yes. Each transport means 31, 32 has a pair of guide rails 33, 34 arranged in parallel on the base 11 so as to face each other in parallel. A pair of conveyor belts (not shown) for supporting and transporting the circuit board B guided by the guide rails 33 and 34 are arranged in parallel on the transport means 31 and 32.

  The component transfer device 40 is composed of an XY robot. The XY robot is mounted on the base 11 and disposed above the component supply device 20 and the substrate transport device 30, and extends along the guide rail 41 in the X-axis direction. A Y-axis moving table 42 that is movable in the orthogonal Y-axis direction is provided. The movement of the Y-axis moving table 42 in the Y-axis direction is controlled by a Y-axis servo motor 44 via a ball screw 43. An X-axis moving table 45 is guided and supported on the Y-axis moving table 42 so as to be movable in the X-axis direction. The X-axis moving table 45 is moved in the X-axis direction via an unillustrated ball screw. Controlled by

  A mounting head 47 is attached to the X-axis moving table 45, and a nozzle head 48 (see FIG. 2) is supported on the mounting head 47 so as to be rotatable about an axis parallel to the Z-axis direction. On the circumference of the nozzle head 48, a plurality of suction nozzles 50 (see FIG. 2) that suck electronic components are held so as to be movable up and down in the Z-axis direction.

  A board imaging device 51 composed of a CCD camera is mounted on the X-axis moving table 45, and the board imaging device 51 images the reference mark and the board ID mark provided on the printed board B positioned at a predetermined position. Substrate position reference information and substrate ID information are acquired. Then, based on the board position reference information acquired by the board imaging device 51, the mounting head 47 is corrected in the XY direction with respect to the printed board B, and the mounting operation of the electronic component is controlled based on the board ID information. It is supposed to be.

  On the base 11, a component imaging device 52 including a CCD camera that images the electronic component sucked by the suction nozzle 50 from below is provided. The component imaging device 52 images the electronic component sucked by the suction nozzle 50 while moving from the component supply device 20 onto the printed circuit board B, and detects the misalignment and angular misalignment of the electronic component with respect to the center of the suction nozzle 50. Based on these, the movement amount of the mounting head 47 in the XY directions and the like is corrected.

  As shown in FIG. 2, a flat cable 55 that feeds power and transmits / receives signals to / from the mounting head 47 is curved in a U-shape on the Y-axis moving base 42 that moves in the Y-axis direction along the guide rail 41. Are wired. The flat cable 55 has a flat shape in which a plurality of conductive wires are integrally covered with a strip-shaped resin. In the flat cable 55, the moving portion 55a connected to the mounting head 47 is disposed above the fixed portion 55b.

  As shown in FIG. 3, a support base 56 is disposed on the fixed portion on the base 11 so as to cover the upper portion of the guide rail 41 of the Y-axis moving table 42, and both sides of the support base 56 in the X-axis direction are disposed. A pair of flat cables 55 are arranged on the top. On both sides of the support base 56, cable receiving portions 57 that support the fixed side portions 55 b of the pair of flat cables 55 are linearly provided along the lower side of the fixed side portions 55 b of the flat cables 55.

  In addition, a pair of support brackets 58 are mounted on the support base 56, and a plurality of guide rollers 60 that abut the movement side portions 55a of the pair of flat cables 55 are attached to the support brackets 58 of the movement side portion 55a. They are arranged at a predetermined pitch interval over the entire movement path. The plurality of guide rollers 60 are supported by a support shaft 61 fixed to the support bracket 58 so as to be rotatable about an axis parallel to the X-axis direction, and can hold the lift of the moving side portion 55a of the flat cable 55 from above. It is configured.

  Further, a rotation stopping mechanism 63 is provided on the support base 56 along the upper side of the plurality of guide rollers 60. The rotation stop mechanism 63 forcibly stops the rotation of the plurality of guide rollers 60 when the movement of the Y-axis moving base 42 is stopped, and has a holding base 65 attached on the support base 56. A plate-like braking member 66 is supported on the holding base 65 so as to be movable in the vertical direction above the plurality of guide rollers 60. The braking member 66 extends in the arrangement direction of the plurality of guide rollers 60.

  The braking member 66 is moved up and down by a predetermined amount by a braking actuator 67 installed on the holding stand 65, and comes into contact with the plurality of guide rollers 60 by being lowered, so that the guide roller 60 rotating by inertia is stopped by frictional force. It has become. Further, the braking member 66 is separated from the guide roller 60 when lifted, and allows the guide roller 60 to rotate.

  In order to stop the rotation by reliably bringing the braking member 66 into contact with the plurality of guide rollers 60, an elastic friction material may be formed on the lower surface of the braking member 66, that is, the surface facing the guide roller 60. .

  The component mounter 10 is controlled by a control device 70 shown in FIG. The control device 70 includes a CPU 71 as a central processing unit, a ROM 72 and a RAM 73 as storage devices, and an input / output interface 75. The input / output interface 75 is picked up by the component supply device 20, the substrate transfer device 30, the component transfer device 40, the rotation stop mechanism 63, and the like, and the substrate image pickup device 51 and the component image pickup device 52. An image processing device 78 that performs image processing on the obtained image data is connected. The ROM 72 stores a program for controlling a sequence operation of the mounting head 47 and the like, including a basic program for mounting electronic components on the printed circuit board B.

  In the above-described embodiment, when the mounting head 47 (Y-axis moving table 42) is moved in the Y-axis direction along the guide rail 41 by the Y-axis servo motor 44, the moving side portion 55a of the flat cable 55 is moved to the mounting head. 47 is moved together. For example, when the moving side portion 55a of the flat cable 55 is moved in the right direction (+ Y direction) in FIG. 5, the guide roller 60 that guides the moving side portion 55a is rotated counterclockwise. When the portion 55a is moved in the left direction (−Y direction) in FIG. 5, the guide roller 60 is rotated clockwise.

  At this time, some of the plurality of guide rollers 60 may continue to rotate due to inertia even when the mounting head 47 (Y-axis moving table 42) stops. In this state, the mounting head 47 is in the reverse direction. When the guide roller 60 is moved to, a large frictional force to reversely rotate the guide roller 60 acts between the guide roller 60 rotating by inertia and the flat cable 55. When such a state is repeated, the sheath of the flat cable 55 is worn, and the life of the flat cable 55 is reduced.

  However, in the present embodiment, when the mounting head 47 is stopped, the rotation stop mechanism is controlled by the mounting machine controller 76 of the control device 70 based on the stop signal, for example, the positioning completion signal of the Y-axis servo motor 44. A braking signal is sent to 63, whereby the rotation stopping mechanism 63 is operated and the rotation of the guide roller 60 is forcibly stopped.

  That is, the braking actuator 67 of the rotation stopping mechanism 63 is controlled by the braking signal from the mounting machine control unit 76, and the braking member 66 is lowered toward the plurality of guide rollers 60 and contacts the plurality of guide rollers 60. Due to the frictional engagement effect caused by the contact of the braking member 66 with the guide roller 60, the rotation of the guide roller 60 rotating by inertia is forcibly stopped.

  Thereby, even if the mounting head 47 is moved in the reverse direction after stopping, a large frictional force does not act between the guide roller 60 and the flat cable 55, and the guide roller 60 smoothly moves as the flat cable 55 moves. The friction force generated between the guide roller 60 and the flat cable 55 is reduced.

  As described above, according to the present embodiment, since the rotation stopping mechanism 63 that stops the rotation of the plurality of guide rollers 60 when the operation of the mounting head 47 is stopped is provided, the inertia of the guide roller 60 after the mounting head 47 stops. The rotation can be prevented, and the frictional force generated between the guide roller 60 and the flat cable 55 when the moving direction of the mounting head 47 is reversed as in the prior art can be reduced. As a result, the life of the flat cable 55 is extended, and problems such as poor insulation can be prevented.

  In the above-described embodiment, the moving side portion 55a of the flat cable 55 is arranged on the upper side, and the fixed side portion 55b is arranged on the lower side. The side portion may be disposed below and the fixed portion may be disposed above. In this case, the guide roller 60 and the rotation stop mechanism 63 may be disposed below the flat cable 55.

  In the above-described embodiment, since the present invention is applied to the guide of the flat cable 55 connected to the mounting head 47 of the component mounting machine 10, even if the mounting head 47 reciprocates at high speed, the flat cable 55 However, the present invention is not limited to this, and can be applied to various devices in which a flat cable 55 is curved and wired in a U-shape on a reciprocating moving body. is there.

  Furthermore, in the above-described embodiment, the example in which the pair of flat cables 55 is disposed on both sides of the guide rail 41 that guides the Y-axis moving table 42 to be movable has been described. However, the flat cable 55 is a single one. There may be. Note that the cable 55 is not necessarily flat (flat cable), and may be one in which irregularities are formed on the upper and lower surfaces of a flat shape.

  As mentioned above, although the cable guide apparatus of this invention was demonstrated according to embodiment, this invention is not limited to these, As long as it is not contrary to the technical idea of this invention, it can change suitably and can apply. Needless to say.

  The cable guide device according to the present invention is suitable for use in a cable that guides a cable that performs power feeding and signal transmission / reception to a mounting head of a component mounting machine that reciprocally moves in a U shape.

DESCRIPTION OF SYMBOLS 10 ... Component mounting machine, 41 ... Guide rail, 47 ... Moving body (mounting head), 50 ... Adsorption nozzle, 55 ... Cable (flat cable), 55a ... Moving side part, 55b ... Fixed side part, 60 ... Guide roller, 63: Rotation stop mechanism, 66: Braking member, 67 ... Actuator for braking, 70 ... Control device, 76 ... Mounting machine controller.

Claims (4)

A cable that feeds power and / or transmits / receives signals to / from a reciprocating moving body is bent in a U-shape, and the moving side portion of the cable connected to the moving body is connected to the fixed side. Located above or below the part,
A plurality of guide rollers for guiding a portion on the moving side of the cable are disposed along the moving direction of the moving body,
A cable guide device comprising: a rotation stop mechanism that stops rotation of the plurality of guide rollers when operation of the moving body is stopped.   2. The rotation stop mechanism according to claim 1, wherein the rotation stopping mechanism includes a braking member that can move forward and backward, extending in an arrangement direction of the plurality of guide rollers, and advancing the braking member to move the plurality of guide rollers to the braking member and the cable. A cable guide device including a braking actuator that is sandwiched between the two and stops rotation.   The cable guide device according to claim 1, wherein the moving body is a mounting head that holds a suction nozzle in a component mounting machine. 3. The cable guide device according to claim 1, wherein the cable is a flat cable in which a plurality of conductive wires are covered with a strip-shaped resin.

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