JP2005340238A - Component shifting apparatus, surface mounting apparatus and component inspection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component transfer apparatus which does not result in excessive load of a Z-axis driver at the time of replacing an attracting nozzle, and also to provide a surface mounting apparatus and a component inspection apparatus. <P>SOLUTION: A nozzle switching mechanism 42 provided is capable of lifting a nozzle shaft 36 from the usual usage position at the time of replacing an attracting nozzle 8 and engaging an engaging member 84 (second bevel gear 75) in the side of nozzle shaft 36 with the engaging member 84 in the side of a housing. The engaging member 84 in the side of housing 82 is supported to freely shift in the vertical direction against a support member 83. A compression coil spring 94 is also provided to activate this engaging member 84 toward the lower side. A sensor 96 is also provided to detect that this engaging member 84 has shifted toward the upper side against the support member 83. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a component transfer device, a surface mounter, and a component inspection device in which a suction nozzle is replaced when a nozzle shaft having a suction head moves upward from a normal use position.

  2. Description of the Related Art Conventionally, for example, a surface mounting machine that mounts electronic components on a printed wiring board and a component inspection device that inspects electronic components are equipped with a component transfer device that sucks and transfers electronic components by a suction nozzle. This type of component transfer apparatus includes a head unit that moves in two directions orthogonal to each other on a horizontal plane, a suction head that is supported so as to be rotatable and vertically movable on an axis perpendicular to the head unit, A rotational drive device (hereinafter simply referred to as an R-axis drive device) that rotates the suction head on a vertical axis, and a vertical drive device (hereinafter referred to as the R-axis drive device) that moves the suction head in the vertical direction. Simply called a Z-axis drive device) and a suction nozzle attached to the lower end of the suction head. The R-axis drive device is configured to transmit the power of the motor to the suction head by a belt-type transmission unit, and the Z-axis drive unit is configured to drive the suction head by an air cylinder provided in parallel with the suction head. Has been adopted.

  A conventional component transfer apparatus of this type is mounted on a surface mounter disclosed in Patent Document 1, for example. The component transfer device disclosed in this publication is provided with a plurality of suction nozzles in one suction head so that the suction nozzles can be replaced without moving the head unit to the suction nozzle replacement place. A configuration is adopted in which the suction nozzle is loaded into a use position as required by a nozzle switching mechanism.

  The plurality of suction nozzles are radially attached to the outer peripheral portion of the disk-like nozzle assembly block, and are supported by the nozzle shaft of the suction head via the nozzle assembly block, and in the air suction passage. It is connected. The nozzle assembly block is rotatably attached to the lower end portion of the nozzle shaft on a horizontal axis, and is rotated by the nozzle switching mechanism so that a desired suction nozzle is positioned at a use position directed downward. .

  The nozzle switching mechanism is rotatably supported by the nozzle shaft in a state of meshing with the first bevel gear fixed to the nozzle assembly block so as to be positioned on the same axis. A second bevel gear, an engagement groove formed in the outer peripheral portion of the second bevel gear, a protrusion of an engagement protrusion provided on the suction head housing located above the second bevel gear, and the like It is constituted by. The engaging protrusion engages with the engaging concave groove and restricts the rotation of the second bevel gear in the engaged state.

The suction head equipped with this nozzle switching mechanism is normally used in a state where the first engagement member of the second bevel gear is spaced downward from the second engagement member. In this normal use state, the first and second bevel gears rotate on a vertical axis together with the nozzle shaft and move in the vertical direction. On the other hand, when changing the suction nozzle, the suction head moves the nozzle shaft from the normal use position to the upper side and then rotates in that state, and then lowers the nozzle shaft to the initial position. That is, when the nozzle shaft is raised, the engagement concave groove is engaged with the engagement protrusion, and the rotation of the second bevel gear is restricted. One bevel gear revolves on a vertical axis while rotating, and the nozzle assembly block rotates together with the first bevel gear. As the nozzle assembly block rotates in this manner, the plurality of suction nozzles sequentially move to the use position.
In addition, the applicant could not find any prior art documents closely related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in the present specification. .
Japanese Patent Laid-Open No. 2000-36696 (pages 5-7, FIG. 6)

  However, in the suction head equipped with the nozzle switching mechanism configured as described above, the load on the Z-axis drive device may be excessive when the suction nozzle is changed. This is because when the position of the nozzle shaft in the rotational direction is shifted from the correct position due to some accidental failure when the engaging groove and the engaging protrusion are engaged, the portion adjacent to the engaging groove is This is because there is a possibility of hitting the engaging protrusion.

  For this reason, the parts transfer device equipped with this kind of nozzle switching mechanism avoids using a motor as a power source of the Z-axis drive device and uses an air cylinder. However, the Z-axis drive device can easily adjust the position of the suction nozzle in the height direction, for example, for each electronic component by using a servo motor as a power source. Electronic parts can be transferred.

  The present invention has been made to solve such problems, and a component transfer device, a surface mounter, and a component inspection device that do not cause an excessive load on the Z-axis drive device when the suction nozzle is changed. The purpose is to provide.

  In order to achieve this object, the component transfer apparatus according to the present invention is configured such that the nozzle shaft that supports the plurality of suction nozzles moves upward from the normal use position with respect to the housing of the suction head, thereby engaging the nozzle shaft. A component transfer device having a nozzle switching mechanism in which a member engages with an engagement member of the housing from below, and a plurality of suction nozzles sequentially move to a use position by rotating the nozzle shaft in this engagement state. 1, wherein either one of the engagement member on the nozzle shaft side or the engagement member on the housing side is configured to be movable in the vertical direction with respect to the support member that supports the engagement member, and the other engagement And a sensor for detecting the movement of the movable engaging member with respect to the support member.

A component transfer apparatus according to a second aspect of the present invention is the component transfer apparatus according to the first aspect of the present invention, wherein an engagement member on the housing side of the suction head is movably supported on the housing, and the sensor Thus, the engagement member on the housing side is detected.
According to a third aspect of the present invention, there is provided the component transfer apparatus according to the first or second aspect, wherein when the movement of the engagement member relative to the support member is detected by the sensor, the adsorption is performed. The movement of the nozzle shaft above the normal use position relative to the head housing is stopped or decelerated.

  According to a fourth aspect of the present invention, there is provided the component transfer apparatus according to the first or second aspect, wherein when the movement of the engagement member relative to the support member is detected by the sensor, the suction is performed. The movement of the nozzle shaft above the normal use position with respect to the head housing is stopped or decelerated, and the nozzle shaft is rotated so that the engagement member of the nozzle shaft and the engagement member of the housing are engaged with each other. It is a thing.

A surface mounting machine according to a fifth aspect of the present invention provides a mounting component that is mounted on a printed wiring board from a component supply unit by the component transfer device according to any one of the first to fourth aspects. To be transferred to.
According to a fourth aspect of the present invention, there is provided a component inspection apparatus in which an electronic component to be inspected is inspected from a component supply unit by the component transfer apparatus according to any one of the first to fourth aspects. It is to move up.

According to the present invention, when the position of the rotation direction of the nozzle shaft is deviated from the correct position when the suction nozzle is changed, the nozzle shaft is lifted to engage the engagement member on the nozzle shaft side with the housing side. Any one of the engaging members moves in the vertical direction against the urging force of the urging means with respect to the other engaging member.
For this reason, even if the position of the rotation direction of the nozzle shaft when changing the suction nozzle is deviated from the correct position, the upward movement of the nozzle shaft is not hindered by the engaging member. Can be kept to the same size as normal use.

Therefore, since the load on the Z-axis drive device does not become excessive, a component transfer device that can use, for example, a servo motor as a power source of the Z-axis drive device can be provided. A component transfer device equipped with a Z-axis drive device using a servo motor as a power source can adjust the vertical position of the suction nozzle with higher accuracy.
Further, as described above, when the engaging members cannot be correctly engaged with each other, the moved engaging member is detected by the sensor. For this reason, such a non-engagement state can be directly detected by the sensor, the operator can be notified of the non-engagement state, and the nozzle switching operation can be stopped. Not only can it be prevented from being overloaded, but also the parts transfer device can be provided with a fail-safe function.

According to the second aspect of the present invention, the support member that supports the engaging member so as to be movable in the vertical direction and the sensor that detects the engaging member can be supported on the housing side of the suction head. The load on the nozzle shaft can be reduced as compared with the case where the member is supported on the nozzle shaft side. Therefore, the component transfer device according to the present invention can reduce the inertia weight of the nozzle shaft, The load on the drive device can be further reduced, and the load on the R-axis drive device can also be reduced.

  According to the third aspect of the present invention, when the apparatus is in the non-engagement state, the apparatus stops or operates at a low speed, so that the next operation is not performed in the non-engagement state, and the non-engagement state is The work to eliminate becomes easy. According to the fourth aspect of the invention, since the non-engaged state is automatically corrected to the engaged state, the operating rate of the apparatus can be improved.

According to the fifth aspect of the present invention, since the component transfer device that does not cause an excessive load on the Z-axis drive device is used, the Z-axis drive device using a servo motor as a power source can be used. A surface mounter with higher mounting accuracy can be provided.
According to the sixth aspect of the invention, since the component transfer device that does not cause an excessive load on the Z-axis drive device is used, the Z-axis drive device using a servo motor as a power source can be used. It is possible to provide a component inspection apparatus with higher inspection accuracy.

Hereinafter, an embodiment of a component transfer apparatus according to the present invention will be described in detail with reference to FIGS. Here, an example in which the component transfer apparatus according to the present invention is installed in a surface mounter will be described.
1 is a plan view of a surface mounter equipped with a component transfer apparatus according to the present invention, FIG. 2 is a front view of the upper portion of the surface mounter, FIG. 3 is an enlarged front view of the head unit, and FIG. In the side view, this figure is drawn in a partially broken state. 5 is an enlarged front view showing the nozzle switching mechanism according to the present invention, FIGS. 6 and 7 are sectional views taken along the line VI-VI in FIG. 5, FIG. 6 shows a state during normal use, and FIG. The state when changing the nozzle is shown.

  In these drawings, the reference numeral 1 indicates a surface mounter according to this embodiment. The surface mounter 1 includes a conveyer 4 that conveys a printed wiring board 3 on an upper part of a base 2, and a head unit 5 that will be described later in the left-right direction (hereinafter referred to simply as the X direction) and the X direction in FIG. And a moving device 6 that moves in the orthogonal front-rear direction (hereinafter, this direction is referred to as Y direction). The head unit 5 and the moving device 6 constitute a component transfer device referred to in the present invention. The conveyor 4 is configured to convey the printed wiring board 3 to the left in FIG. 1 and hold it at a work position by a clamping mechanism (not shown). On both sides of the conveyor 4, a tape feeder 7 for supplying components and a component recognizing device 10 for imaging the mounting component 9 and the like sucked by the suction nozzle 8 (see FIG. 2) from below are provided on the base 2. Is provided.

  The moving device 6 is movable between a Y-direction moving device 12 having two fixed rails 11 and 11 extending in the Y direction above the conveyor 4 and the fixed rails 11 and 11. And an X-direction moving device 14 having rails 13. The head unit 5 is attached to the X-direction moving device 14. The head unit 5 and the moving device 6 are controlled in moving direction, distance, speed, and the like by a control device (not shown).

The Y-direction moving device 12 moves the movable rail 13 of the X-direction moving device 14 in the Y direction by a ball screw shaft 15 extending along the fixed rail 11 and a Y-axis servo motor 16 that drives the ball screw shaft 15. Reciprocate. The movable rail 13 is fixed to a nut member 15 a of the ball screw shaft 15. The Y-axis servomotor 16 is provided with position detecting means 17 comprising an encoder.
The X-direction moving device 14 reciprocates the head unit 5 in the X direction by a ball screw shaft 18 provided in parallel with the movable rail 13 extending in the X direction and an X-axis servo motor 19 that drives the ball screw shaft 18. Let The X-axis servo motor 19 is provided with position detecting means 20 comprising an encoder.

  2 to 4, the head unit 5 has a base plate 21 formed so as to extend in the X direction and the vertical direction (hereinafter, this direction is simply referred to as the Z direction). It is assembled by attaching each member and apparatus to be described later. The head unit 5 is attached to the X-direction moving device 14 by the base plate 21.

  The base plate 21 includes first to eighth suction heads 22 to 29 having the suction nozzle 8 attached to the lower end thereof, and a Z-axis drive device 31 (see FIG. 5) for moving these suction heads 22 to 29 in the Z direction. 4), an R-axis drive device 32 for horizontally rotating these suction heads 22 to 29, an image recognition device 34 having a camera 33 pointing downward, and a vacuum generator 35 for each suction head (see FIG. 4). The image recognition device 34 captures a positioning mark (not shown) on the printed wiring board 3 with a camera 33 and detects the position of the printed wiring board 3 and the angle with respect to the X and Y directions. It is attached to the lower end of the base plate 21. The vacuum generator 35 generates negative pressure in order to suck air from the suction nozzle 8 or supplies positive pressure air at the time of component placement. The first to eighth suction heads 22 to 29 are used. It is provided for each and is attached to the upper end of the base plate 21.

  The suction heads 22 to 29 are provided at a nozzle shaft 36 extending in the Z direction in front of the base plate 21 (a front side in FIG. 3 and a left side in FIG. 4), and a lower end portion of the nozzle shaft 36. Further, the suction nozzle 8 and the like are used. The nozzle shaft 36 is supported by a lower support member 37 provided at a lower end portion of the base plate 21 so as to be rotatable and movable in the Z direction, and an upper shaft portion of the lower nozzle shaft 36a. The upper nozzle shaft 36b is detachably connected via a joint 38.

  An air passage 39 (see FIGS. 6 and 7) connected to an air passage (not shown) in the suction nozzle 8 is formed at the axial center of the lower nozzle shaft 36a and the upper nozzle shaft 36b. The air passage 39 extends upward from the suction nozzle 8 through the inside of the lower nozzle shaft 36a and the upper nozzle shaft 36b, and is open to the upper end surface of the upper nozzle shaft 36b as shown in FIG. Further, as shown in FIG. 5, the air passage 39 is formed by a connecting member 40 (described later) attached to the upper end portion of the upper nozzle shaft 36b and an air pipe 41 connected to the upper end portion of the connecting member 40. The vacuum generator 35 is connected. The connecting member 40 is for rotatably connecting the upper nozzle shaft 36a to the other end of the air pipe 41 whose movement is restricted by connecting one end to the vacuum generator 35. An inner cylinder 40a attached to the upper nozzle shaft 36a, and an outer cylinder 40b rotatably supported by the inner cylinder 40a via a bearing (not shown) and attached to the tip of the air pipe 41. Has been.

Of the eight lower nozzle shafts 36a, the lower nozzle shafts 36a of the first, third and fifth suction heads 22, 24, 26 are provided with a nozzle switching mechanism 42, which will be described later, at the lower end portion. Three kinds of suction nozzles 8 are provided through 42 so as to be replaceable. These three kinds of suction nozzles are mounted with different sizes of mounting parts that can be sucked. On the other hand, only one suction nozzle 8 is provided on the other lower nozzle shaft 36a among the lower nozzle shafts 36a shown in FIG. A bracket 43 for connecting a Z-axis drive device 31 to be described later is attached to the upper ends of these lower nozzle shafts 36a.
As shown in FIGS. 3 and 4, the upper nozzle shaft 36 b is supported by an upper support member 44 provided on the upper portion of the base plate 21 so as to be rotatable and movable in the Z direction.

  As shown in FIG. 4, the Z-axis drive device 31 includes a rack 45 extending in the Z direction in parallel with the upper nozzle shaft 36 b and servomotors 47 and 48 having pinions 46 that mesh with the rack 45. ing. The rack 45 is provided for each of the suction heads 22 to 29, and is held by a U-shaped frame 49 supported by the base plate 21 so as to be movable in the Z direction via a rail 51 and a slider 50. ing. The slider 50 is fixed to the frame 49 and holds the rail 51 movably in the Z direction. The rail 51 is fixed to the rack 45 so as to move together with the rack 45. A lower end portion of the rail 51 extends downward in the hollow portion 44 a of the upper support member 44, and is connected to the lower nozzle shaft 36 a via a connecting member 52 and the bracket 43.

The servomotors 47 and 48 are located between the two upper nozzle shafts 36b and 36b adjacent to each other (between the suction head 22 and the suction head 23, between the suction head 24 and the suction head in the front view shown in FIG. 25, between the suction head 26 and the suction head 27, and between the suction head 28 and the suction head 29), and as shown in FIG. It is provided side by side. Of these servomotors 47 and 48, the pinion 46 of the servomotor 47 positioned on the lower side is the same as that of the upper nozzle shaft 36b positioned on the left side in FIG. 3 among the two adjacent upper nozzle shafts 36b and 36b. The pinion 46 of the servo motor 48 that is meshed with the rack 45 (connected in the vertical direction via the shaft coupling 38, the lower nozzle shaft 36a, the bracket 43, and the connecting member 52) is located on the upper nozzle. It meshes with the rack 45 of the shaft 36b.
Each rack 45, 45,... Of the Z-axis drive device 31 according to this embodiment is formed to be divided into two members in order to eliminate an error due to backlash, and one half of the rack teeth and the other half of the racks. The teeth of the pinion 46 that engage with the teeth of the rack are sandwiched from both sides.

As shown in FIG. 4, the R-axis drive device 32 includes a first rack 53 and a second rack 54 supported on the front surface of the upper support member 44 by a rail 32a and a slider 32b so as to be movable in the X direction. The first servo motor 56 and the second servo motor 57 for driving the rack driving pinion 55 meshing with one end of the racks 53 and 54, and the first rack 53 or the second rack 54. It is comprised from the pinion 58 for every adsorption | suction head which meshes | engages.
The rail 32a is fixed to the upper support member 44 in a state extending in the X direction, and the slider 32b is movably supported by the rail 32a and fixed to the first and second racks 53 and 54. Yes.

The first rack 53 meshes with a pinion 58 that is mounted on a lower portion of the upper nozzle shaft 36b of the upper nozzle shaft 36b of the first to fourth suction heads 22-25 than the upper support member 44, and the second rack 53 54 meshes with a pinion 58 that is mounted on a portion of the upper nozzle shaft 36b of the fifth to eighth suction heads 26-29 above the upper support member 44.
These pinions 58 are rotatably supported by the upper support member 44 in a state where movement in the Z direction is restricted, and are connected to the upper nozzle shaft 36b via a ball spline mechanism (not shown). Yes. That is, when the pinion 58 is rotated by the movement of the rack 54, the rotation of the pinion 58 is transmitted to the upper nozzle shaft 36 b through the ball spline mechanism, and the suction heads 22 to 29 rotate with the suction nozzle 8. When the upper nozzle shaft 36b is moved in the Z direction by the Z-axis drive device 31, the driving force in the Z direction is blocked by the ball spline mechanism, so that the pinion 58 is pressed in the Z direction. There is nothing.

As shown in FIG. 3, the first servo motor 56 and the second servo motor 57 are attached to both ends of the base plate 21 in the X direction via motor support brackets 59 as shown in FIG. 3. . The first and second servo motors 56 and 57 are connected to the rack driving pinion 55 via a reduction gear 61 that meshes with the output gear 60.
Each pinion 55, 58 of the R-axis drive device 32 according to this embodiment and the reduction gear 61 are formed in two parts in order to eliminate an error due to backlash, and one half and the other half Thus, the teeth of the racks 53 and 54 and the output gear 60 are sandwiched.

  The nozzle switching mechanism 42 provided in the first, third and fifth suction heads 22, 24, 26 is fixed to the lower end of the lower nozzle shaft 36a and is downward as shown in FIGS. A hollow cylindrical holder 71 extending in a horizontal direction, a horizontal support shaft 72 fixed to the lower end of the holder 71, a nozzle assembly block 73 rotatably supported by the support shaft 72, and the nozzle assembly A first bevel gear 74 fixed to the block 73, a second bevel gear 75 that is rotatably supported by the holder 71 while meshing with the first bevel gear 74, and the lower nozzle shaft 36a. A positioning rod 76 that is supported on the shaft center so as to be movable in the vertical direction, and a horizontal support that is placed in the middle of the holder 71 with one end engaged with a notch 77 formed in the positioning rod 76. Shaft 78 Therefore, a pair of cams 79 that are rotatably supported, a cylindrical housing 82 that rotatably supports a ring 80 whose other end is in contact with the lower surface by a bearing 81, and a front portion of the housing 82 A support member 83 fixed to the left end in FIGS. 6 and 7 and a housing side engagement member 84 supported by the support member 83 so as to be movable in the vertical direction are provided.

  The other end portion of the nozzle assembly block 73 in the direction of the support shaft 72 is formed in a disc shape, and three suction nozzles 8 are radially attached to the outer peripheral portion, and are opposite to each suction nozzle 8 with the center interposed therebetween. A conical recess 85 for each suction nozzle 8 is formed on the side. A plurality of communication holes 86 connecting the respective conical recesses 85 and the suction nozzle 8 are provided in the nozzle assembly block 73. By rotating the nozzle assembly block 73, the desired conical recess 85 and the suction nozzle 8 communicate with each other in the vertical direction through the communication hole 72a penetrating vertically into the support shaft 72. A tapered portion 76 a formed at the lower end portion of the positioning rod 76 is engaged with the conical recessed portion 85. That is, when the positioning rod 76 is engaged with the conical recess 85, the nozzle assembly block 73 is restricted from rotating about the support shaft 72.

  The positioning rod 76 is biased downward by a compression coil spring 87 elastically mounted between its upper end and the lower nozzle shaft 36a. The cam 79 whose one end engages with the notch 77 of the positioning rod 76 is restricted from moving upward by the ring 80 at the other end, so that the lower nozzle shaft 36a and the holder 71 Moves upward about the support shaft 78 so that the one end moves upward, and moves the positioning rod 76 upward with respect to the holder 71. As the positioning rod 76 moves upward in this manner, the engagement state between the tapered portion 76a and the conical recess 85 is eliminated, and the nozzle assembly block 73 can be rotated about the support shaft 72. become. The ring 80 is formed so that the holder 71 is fitted in an inner circumferential portion in a loosely fitted state.

The second bevel gear 75 is integrally formed with a flange portion 88 protruding outward in the radial direction at the upper end portion. A concave groove 90 is formed in the collar portion 88 to engage with a claw piece 89 (see FIGS. 6 and 7) of a housing side engaging member 84 described later. The concave groove 90 constitutes an engaging member on the nozzle shaft side in the present invention.
The housing 82 is fixed to the lower support member 83, and the bearing 81 is attached to the inner periphery. As shown in FIG. 5, the support member 83 attached to the front portion of the housing 82 is formed in a U-shape that opens upward in a front view. In FIG. The engaging member 84 is supported so as to be movable in the vertical direction.

  The engaging member 84 is integrally formed with a shaft portion 92 fitted into the shaft hole 91 of the support member 83 and a claw piece 89 protruding from the lower end of the shaft portion 92 toward the lower nozzle shaft 36a. . The engaging member 84 is regulated by a nut 93 screwed to the upper end portion of the shaft portion 92 so as not to drop downward, and a compression coil spring 94 elastically mounted in the support member 83. It is biased downward. The compression coil spring 94 constitutes an urging means in the present invention.

The claw piece 89 is formed in a plate shape, and as shown in FIGS. 6 and 7, the claw piece 89 extends vertically in a concave groove 95 formed to open downward at the lower end of the housing 82. It is movably fitted. Further, the thickness of the claw piece 89 is formed so as to be able to engage with the concave groove 90 formed in the second bevel gear 75.
A sensor 96 for detecting the position of the upper end portion of the engagement member 84 is provided on the upper portion of the support member 83. The sensor 96 is an optical sensor, and is inserted into a through hole 97 formed in the support member 83 so as to extend in the horizontal direction. When the nozzle shaft 36 is raised from the position shown in FIG. 6, the claw piece 89 of the engaging member 84 cannot be fitted into the concave groove 90 of the collar portion 88 as described below, and the engaging member 84 is pushed up by the collar portion 88. If so, the sensor 96 detects the rise of the engaging member 84 and sends a detection signal to a control device (not shown).

  In the surface mounting machine 1 equipped with the nozzle switching mechanism 42 configured as described above, the suction nozzle 8 is mounted on the tape feeder 7 by the moving device 6 in order to cause the suction nozzle 8 to suck the mounting component 9. Positioned on the component 9, the nozzle shaft 36 is lowered from the reference position shown in FIGS. 5 and 6 by the Z-axis drive device 31. After the mounting component 9 is attracted to the suction nozzle 8, the nozzle shaft 36 is raised to the height shown in FIGS. In the surface mounter 1 according to this embodiment, when the head unit 5 is moved in the horizontal direction, the nozzle shaft 36 is positioned at the reference position shown in FIGS. 5 and 6, and the mounting component 9 is transferred to the printed wiring board. When this is done, the nozzle shaft 36 is lowered from the reference position in the same manner as during suction. Further, when the direction of the mounting component 9 is changed from the direction at the time of suction during mounting, the nozzle shaft 36 is rotated by the R-axis drive device 32. At this time, the nozzle shaft 36, the holder 71, the first and second bevel gears 74 and 75, and the like rotate integrally.

  In the surface mounter 1, in order to change the suction nozzle 8 by the nozzle switching mechanism 42, first, the nozzle shaft 36 is raised by the Z-axis drive device 31 to the raised position above the reference position shown in FIGS. When the nozzle shaft 36 is raised in this way, normally, as shown in FIG. 7, the claw piece 89 of the housing side engaging member 84 is engaged with the concave groove 90 formed in the flange portion 88 of the second bevel gear 75. The positioning rod 76 is moved upward with respect to the holder 71 by the cam 79. Next, the nozzle shaft 36 is rotated in a predetermined direction by the R-axis drive device 32. At this time, in the second bevel gear 75, the claw piece 89 of the engaging member 84 is engaged with the concave groove 90 of the collar portion 88, and thus the rotation is restricted, so that the nozzle shaft 36 rotates. As a result, the first bevel gear 74 revolves around the vertical axis while meshing with the stationary second bevel gear 75, thereby rotating around the support shaft 72. The nozzle assembly block 73 rotates in synchronization with the first bevel gear 74. As the nozzle assembly block 73 rotates in this way, the suction nozzle 8 that has been located at the use position so far moves sideways, and the suction nozzle 8 that is located next to the suction nozzle 8 is newly located at the use position.

  The surface mounter 1 according to this embodiment rotates the nozzle assembly block 73 in this way, and positions any one of the three suction nozzles 8 at the use position (position directed downward). The suction nozzle 8 can be changed. Further, the surface mounter 1 positions the desired suction nozzle 8 at the use position, and then lowers the nozzle shaft 36 to the reference position by the Z-axis drive device 31. By the downward movement of the nozzle shaft 36, the tapered portion 76a of the positioning rod 76 is engaged with the conical concave portion 85 of the nozzle assembly block 73, and the rotation of the nozzle assembly block 73 is restricted and the suction nozzle 8 Becomes available.

  In the surface mounter 1 according to this embodiment, the position of the nozzle shaft 36 in the rotational direction is shifted from the correct position after the R-axis drive device 32 frequently changes the position of the mounting component 9 in the rotational direction. There is. When the nozzle shaft 36 for changing the suction nozzle 8 in this state is raised, the groove 90 of the second bevel gear 75 is displaced with respect to the claw piece 89 of the engaging member 84, so that the nozzle shaft When the 36 is raised, the claw piece 89 comes into contact with a portion of the collar portion 88 of the second bevel gear 75 adjacent to the concave groove 90. In this case, when the nozzle shaft 36 is raised, the engagement member 84 is pushed up against the elastic force of the compression coil spring 94 by the collar portion 88, and the nozzle shaft 36 is moved upward by the engagement member 84. Ascend to the ascending position without being restricted. At this time, since the engaging member 84 moves upward, the upper end portion of the engaging member 84 is detected by the sensor 96, and the control device stops the device and alerts the operator of the abnormality. Activate the alarm lamp.

Therefore, in the component transfer apparatus equipped with the nozzle switching mechanism 42 according to this embodiment, even if the position of the rotation direction of the nozzle shaft 36 when changing the suction nozzle 8 is deviated from the correct position, Since the ascending operation is not hindered by the engaging member 84, the load of the Z-axis drive device 31 can be suppressed to the same size as that during normal use.
For this reason, the surface mounter 1 can use the servo motors 47 and 48 as a power source of the Z-axis drive device 31 because the load on the Z-axis drive device 31 does not become excessive. In this way, by moving the nozzle shaft 36 up and down by the servo motors 47 and 48, the surface mounter 1 according to this embodiment easily adjusts the position of the suction nozzle 8 in the height direction for each mounting component 9, for example. The mounting component 9 can be mounted on the printed wiring board 3 with high accuracy.

  The surface mounter 1 according to this embodiment includes a support member 83 that supports the housing side engaging member 84 so as to be movable in the vertical direction, and a sensor 96 that detects the engaging member 84. Since the fifth suction heads 22, 24, and 26 are supported by the housing 82, the load on the nozzle shaft 36 can be reduced as compared with the case where these members are supported on the nozzle shaft 36 side. For this reason, this surface mounter 1 can reduce the inertia weight of the nozzle shaft 36, can further reduce the load on the Z-axis drive device 31, and also reduce the load on the R-axis drive device 32. can do.

  In the above-described embodiment, the housing side engaging member 84 is configured to be movable with respect to the other engaging member (the collar portion 88 of the second bevel gear 75). The collar portion 88 of the second bevel gear 75 can be configured to be movable in the vertical direction with respect to the engagement member 84. In this case, the sensor 96 is moved to the collar portion 88, and the collar portion 88 is detected by the sensor 96.

In the embodiment described above, an example in which the component transfer device according to the present invention is mounted on a surface mounter has been shown. However, the component transfer device according to the present invention is a device that sucks and transfers a component by a suction nozzle. It can be used for anything as long as it is present. For example, it can be used in a component inspection apparatus that moves an electronic component to be inspected from a component supply unit onto a component inspection unit.
This component inspection device uses a component transfer device that does not cause an excessive load on the Z-axis drive unit, so the inspection accuracy is improved by using a Z-axis drive unit that uses a servo motor as the power source. Can be made. If the sensor 96 is disposed at a position where the sensor 96 can detect a relatively small rise in the engagement member 84, and the rise of the engagement member 84 is detected, the rise of the nozzle shaft 36 is stopped or decelerated, and the R-axis drive is performed. The device 32 is rotated. As a result, when the claw piece 89 is fitted into the concave groove 90, the engaging member 84 is lowered and the detection of the rise by the sensor 96 is released. Therefore, the release is recognized and the nozzle shaft 36 is raised again, so that the claw piece 89 may be fitted into the concave groove 90 completely.

It is a top view of the surface mounting machine equipped with the component transfer apparatus which concerns on this invention. It is a front view of the upper part of a surface mounter. It is a front view which expands and shows a head unit. It is a side view which expands and shows a head unit. It is a front view which expands and shows the nozzle switching mechanism which concerns on this invention. FIG. 6 is a sectional view taken along line VI-VI during normal use in FIG. 5. FIG. 6 is a cross-sectional view taken along the line VI-VI when the suction nozzle is replaced in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Surface mounting machine, 3 ... Printed wiring board, 5 ... Head unit, 8 ... Adsorption nozzle, 9 ... Mounting components, 22-29 ... 1st-8th adsorption head, 36 ... Nozzle shaft, 36a ... Lower nozzle Shaft, 36b ... Upper nozzle shaft, 71 ... Holder, 73 ... Nozzle assembly block, 74 ... First bevel gear, 75 ... Second bevel gear, 82 ... Housing, 83 ... Support member, 84 ... Housing side engagement Member, 88 ... collar part, 89 ... claw piece, 94 ... compression coil spring, 96 ... sensor.

Claims (6)

  The nozzle shaft that supports the plurality of suction nozzles moves above the normal use position with respect to the housing of the suction head, whereby the engagement member of the nozzle shaft engages with the engagement member of the housing from below. In the component transfer apparatus including a nozzle switching mechanism in which a plurality of suction nozzles are sequentially moved to a use position by rotating the nozzle shaft in a combined state, the nozzle shaft side engaging member and the housing side engaging member One of the two is configured to be movable in the vertical direction with respect to the support member that supports the engagement member, and is also urged by the urging means toward the other engagement portion, and this movable engagement. A component transfer apparatus comprising a sensor for detecting movement of a member relative to the support member.   2. The component transfer apparatus according to claim 1, wherein an engagement member on the housing side of the suction head is movably supported by the housing, and the engagement member on the housing side is detected by a sensor.   3. The component transfer apparatus according to claim 1, wherein when the movement of the engaging member relative to the support member is detected by the sensor, the movement of the nozzle shaft above the normal use position with respect to the housing of the suction head is stopped. Alternatively, a parts transfer device characterized by being decelerated.   3. The component transfer apparatus according to claim 1, wherein when the movement of the engaging member relative to the support member is detected by the sensor, the movement of the nozzle shaft above the normal use position with respect to the housing of the suction head is stopped. Alternatively, the component transfer apparatus is characterized in that the speed is reduced and the nozzle shaft is rotated to engage the engaging member of the nozzle shaft and the engaging member of the housing.   A surface mounting machine for transferring a mounting component from a component supply unit onto a printed wiring board by the component transfer apparatus according to claim 1. A component inspection apparatus for moving an electronic component to be inspected from a component supply unit onto an inspection device by the component transfer device according to claim 1.

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