JP2008172072A - Nozzle exchanger and surface mounting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle exchanger performing detection of a nozzle appropriately while containing exchange nozzles with high density. <P>SOLUTION: The nozzle exchange unit 19 comprises a nozzle holding portion 30 having a plurality of nozzle containing holes 31, and nozzle sensors 40a-40d for detecting the nozzles contained in the containing holes 31. Light guide paths 38 corresponding to respective containing holes 31 and traversing the containing holes 31 in the radial direction are formed in the nozzle holding portion 30. The nozzle sensor 40a(-40d) has a common light projecting portion 41a(41c), a prism 42a(-42d) for guiding illumination light from the light projecting portion 41a(41c) to each light guide path 38 while performing spectroscopy, and a light receiving portion 43a(-43d) for receiving the light passed through each light guide path 38. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a nozzle replacement device mounted on a surface mounter that transports and mounts a component on a substrate by a movable mounting head including a component suction nozzle, and the nozzle replacement device. It relates to surface mounters.

  2. Description of the Related Art Conventionally, a surface mounting machine is known that includes a movable mounting head and picks up a component by a component suction nozzle attached to the tip of the head and mounts the component on a printed board.

In this type of surface mounting machine, a nozzle is detachably provided with respect to the mounting head, and a nozzle replacement device holding a replacement nozzle is provided within the movable range of the mounting head. There are also known nozzle replacements (for example, Patent Document 1).
JP-A-2005-217020

  In the nozzle exchange device, normally, a plurality of nozzles corresponding to the type of component are accommodated in a predetermined accommodating portion so that they can be inserted and removed, and the nozzles are automatically exchanged with the mounting head as necessary. Therefore, detect the presence / absence of nozzles in each storage section that changes with nozzle replacement so that the mounting head does not accidentally access the storage section where nozzles are not stored and nozzle replacement mistakes occur. Need to manage.

  Therefore, an optical sensor having a light projecting part and a light receiving part is usually provided to detect the presence or absence of a nozzle. Conventionally, since a sensor is provided for each storage part, the occupied space of the sensor is large. There is a problem that the nozzle replacement device tends to be large in size. In addition, the nozzle changer having a large number of storage units has a problem that the production cost increases because a large number of sensors are required.

  The present invention has been made in view of such circumstances, and appropriately detects the presence / absence of nozzles in each storage section, while allowing a large number of replacement nozzles to be stored at higher density while producing costs. The purpose of this is to reduce the cost.

  The present invention has been made in view of the above problems, and detects a nozzle holding portion having a plurality of storage holes into which replacement nozzles are removably inserted, and nozzles stored in the respective storage holes. A light exchanging device including a light projecting unit, and a light projecting from the light projecting unit in a radial direction. And a plurality of light receiving portions which are provided corresponding to the respective storage holes and receive light crossing the storage holes, respectively (Claim 1).

  In this configuration, nozzle detection light is emitted from a common light projecting unit, and this is split into light that traverses each storage hole in the radial direction by the spectroscopic means and received by a light receiving unit provided for each storage hole. The And the presence or absence of the nozzle in each accommodation hole is detected according to the light-receiving state of each light-receiving part. According to such a configuration, it is possible to reduce the space occupied by the photosensor as compared with the conventional configuration because the light projecting unit in the photosensor is shared. In addition, since the number of light projecting parts is small, it is possible to produce at low cost.

  More specifically, the spectroscopic means includes a plurality of reflecting portions that are arranged corresponding to the storage holes and are arranged in the arrangement direction of the storage holes, and are irradiated from the light projecting unit and the arrangement directions of the storage holes. The irradiation light is spectrally separated by sequentially reflecting a part of the light traveling in the order of each reflection part (claim 2). Alternatively, the spectroscopic means is composed of a plurality of optical fibers that respectively guide the irradiation light from the light projecting unit to the vicinity of the storage holes.

  According to these configurations, it is possible to satisfactorily disperse the light emitted from the common light projecting unit into the light corresponding to each storage hole.

  Note that it is conceivable that erroneous detection or the like may be caused if the respective receiving holes are close to each other and the light receiving parts corresponding to the adjacent receiving holes are close to each other. However, such a problem is solved by the following configuration. That is, the nozzle holding part is formed with a light guide path that traverses each of the storage holes in the radial direction, the light receiving part is disposed in a light deriving part of each light guide path, The light is guided to the light introduction portion of each light guide path while dispersing the irradiation light.

  According to this configuration, the light dispersed by the spectroscopic means travels through the independent light guide and is received by the light receiving unit, so that the above-described inconvenience can be avoided.

  On the other hand, another nozzle replacement device of the present invention includes a nozzle holding portion having a plurality of storage holes into which replacement nozzles are removably inserted, and an optical sensor for detecting the nozzles stored in the storage holes A plurality of light projecting units for irradiation corresponding to the respective housing holes, and one light receiving unit for receiving light from these light projecting units, A light guide unit that guides light that has been projected from each of the light projecting units and crosses the storage hole to the light receiving unit, and further, the light projecting unit is configured to detect the presence or absence of a nozzle in the storage hole. And a sensor control means for controlling the optical sensor so that the light is irradiated in a predetermined order (Claim 5).

  In this configuration, the light for nozzle detection is sequentially emitted in a predetermined order from the light projecting portions corresponding to the respective housing holes, and each irradiation light is guided by the light guiding means and received by the common light receiving portion. And the presence or absence of the nozzle in each accommodation hole is detected according to the light-receiving state of the light in a light-receiving part. According to such a configuration, it is possible to reduce the space occupied by the photosensor as compared with the conventional art because the light receiving unit of the photosensor is shared. Further, since the number of light receiving parts is small, it can be produced at a low cost.

  More specifically, the light guide means includes a plurality of reflecting portions arranged corresponding to the storage holes and arranged in the direction in which the storage holes are arranged, and the light crossing the storage holes is respectively reflected by the reflection portions. The light is guided to the light receiving part by reflection. Alternatively, the light guiding means is composed of a plurality of optical fibers that respectively receive the light crossing the storage holes and guide the light to the light receiving section.

  According to these configurations, it is possible to satisfactorily guide the light emitted from the plurality of light projecting units provided corresponding to the accommodation holes to the common light receiving unit.

  In the nozzle replacement device as described above, a light guide path that traverses each of the storage holes in the radial direction is formed in the nozzle holding part, and the light projecting part is a light introduction part of each light guide path. The light guide means may be configured to guide the light derived from the light deriving portion of each light guide path to the light receiving unit. In that case, the storage holes are arranged in a line in a uniaxial direction, and adjacent ones are alternately offset in a direction orthogonal to the uniaxial direction, and the light guides are arranged in the orthogonal direction. It is preferable that they are provided in parallel with each other (claim 9).

  According to such a configuration, each storage hole can be arranged close to the uniaxial direction, and the light projecting part and the light receiving part of the optical sensor can be arranged in an orderly manner. It becomes possible to arrange | position a hole more densely.

  On the other hand, a surface mounting machine according to the present invention includes a nozzle for picking up a component, the movable mounting head for picking up the component by the nozzle and mounting it on the substrate, and the nozzle between the mounting head A surface mounter including a nozzle replacement device that performs replacement of the nozzle replacement device as described above (as described in any one of claims 1 to 9) as the nozzle replacement device. According to a tenth aspect of the present invention, there is provided detection means for detecting the presence / absence of the nozzles in the storage holes based on the light receiving state of the light receiving portion of the light sensor of the apparatus.

  In this surface mounter, the presence or absence of a nozzle in each storage hole of the nozzle replacement device is detected by the detection means based on the light receiving state of the light receiving portion of the optical sensor.

  According to the nozzle replacement device of the present invention, the presence or absence of the nozzle in each storage hole is detected using the optical sensor, but the light projecting unit or the light receiving unit in the optical sensor is shared as described above. With this configuration, the space occupied by the optical sensor can be reduced, and as a result, a larger number of storage holes can be arranged closer to each other. That is, the replacement nozzle can be stored at a high density. In addition, the production cost can be reduced by the configuration in which the light projecting unit and the light receiving unit are made common.

  A first embodiment of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 schematically shows a surface mounter according to the present invention (a surface mounter equipped with a nozzle exchange device according to the present invention) in a plan view.

  In the figure, a substrate conveying conveyor 2 is disposed on a base 1 of a surface mounting machine (hereinafter abbreviated as a mounting machine), and a printed circuit board 3 (hereinafter abbreviated as a substrate 3) is disposed on the conveyor 2. Is transported, stopped at a predetermined mounting work position, and clamped by a clamp mechanism (not shown). In the following description, for the sake of convenience, the description will proceed with the conveying direction of the conveyor 2 as the X-axis direction, the direction orthogonal to this on the horizontal plane as the Y-axis direction, and the direction orthogonal to the X-axis and Y-axis as the Z-axis direction. To.

  On both sides of the conveyor 2, component supply units 4 that supply mounted components are provided. A plurality of tape feeders 4a are arranged in the X-axis direction in these component supply sections 4, and each of these tape feeders 4a supplies small chip components such as ICs, transistors, capacitors and the like in the vicinity of the conveyor. It is the structure which supplies to a position.

  A head unit 5 for mounting components is provided above the base 1. The head unit 5 is configured to be movable in the X-axis direction and the Y-axis direction within a certain region so that components can be sucked from the component supply unit 4 and mounted on the substrate 3. That is, the support member 7 of the head unit 5 is mounted on the base 1 so as to be movable on the rail 6 in the Y-axis direction. The head unit 5 is mounted on the support member 7 and the guide member in the X-axis direction ( (Not shown) is movably mounted. Then, the support member 7 is screwed and attached to the ball screw 9 driven by the Y-axis servomotor 10, whereby the support member 7 is moved in the Y-axis direction, while the ball driven by the X-axis servomotor 12. The head unit 5 is screwed onto the screw 11 so that the head unit 5 is moved in the X-axis direction.

  The head unit 5 is mounted with a plurality of mounting heads 20 for adsorbing components and mounting them on the substrate 3. In this embodiment, six mounting heads 20 configured in a shaft shape are X-shaped. It is mounted in a line in the axial direction.

  These mounting heads 20 are connected to an elevating mechanism using a Z-axis servomotor (not shown) as a drive source and connected to a rotating mechanism using an R-axis servomotor (not shown) as a drive source, respectively. These mechanisms are driven in the vertical direction (Z-axis direction) and around the axis (R-axis direction) with respect to the head unit 5, respectively.

  The tip 21 of each mounting head 20 is provided with a component suction nozzle 21 (see FIG. 3A). Each nozzle 21 is connected to a negative pressure supply device through a valve or the like not shown in the drawing. When taking out a part from each tape feeder 4a, the negative pressure is supplied to the tip of the nozzle 21 to adsorb the part. Is to be done.

  The nozzle 21 is detachably attached to the mounting head 20, and is replaced with another nozzle 21 having a different shape and size as necessary. That is, as shown in FIGS. 3A and 3B, a shaft portion 20a for externally mounting the nozzle 21 and a pair of plate springs 20b for holding the nozzle are provided at the tip (lower end) of the mounting head. When the nozzle 21 is externally fitted to the shaft portion 20a, the leaf spring 20b is elastically engaged with the engaging portion 21a provided at the upper end thereof, whereby the nozzle 21 is mounted on the mounting head. On the other hand, the nozzle 21 is separated from the mounting head 20 when an external force larger than the elastic force of the leaf spring 20b acts on the nozzle 21 in the nozzle pulling direction. .

  On the base 1, a nozzle replacement unit 19 (corresponding to the nozzle replacement device according to the present invention) in which a replacement nozzle 21 for the mounting head 20 is accommodated is further provided.

  In the mounting machine, when the head unit 5 moves between the substrate 3 positioned at a predetermined work position and the component supply unit 4, the component 21 is moved from the component supply unit 4 by the nozzle 21 of each mounting head 20. Is picked up and conveyed onto the substrate 3, and components are sequentially mounted at predetermined positions on the substrate 3. When necessary, the nozzle 21 of each mounting head 20 is replaced with another nozzle 21 housed in the nozzle replacement unit 19, and the mounting operation of the components is performed while such replacement of the nozzle 21 is appropriately performed. Can be advanced.

  Next, a specific configuration of the nozzle replacement unit 19 will be described with reference to FIGS.

  As shown in FIG. 2A, the nozzle replacement unit 19 includes a block-shaped nozzle holding portion 30 supported on the base 1 and a shutter member 32 that is slidably disposed on the upper surface of the nozzle holding portion 30. And have.

  As shown in FIG. 4 and FIG. 4, the nozzle holding portion 30 is provided with a plurality of nozzle housing holes 31 for housing the nozzles 21. In the example shown in the figure, four nozzle storage holes 31 arranged in a line at regular intervals in the X-axis direction are provided in four rows in the Y-axis direction, so that a total of 32 nozzle storage holes 31 are provided in the nozzle holder 30. It has been.

  As shown in FIGS. 4 and 5, these rows are arranged on both sides of a recess 30 a extending in the X-axis direction formed along the center line C (line segment parallel to the X-axis) of the nozzle holding unit 30. There are two rows each. In the following description, among the rows of the nozzle housing holes 31, the row provided on one side (the upper side in FIG. 4) of the recess 30a is referred to as a first row La and a second row Lb in that order from the recess 30a side. The description will proceed with the column provided on the other side (the lower side in FIG. 4) as the third column Lc and the fourth column Ld.

  As shown in FIG. 4, the nozzle storage holes 31 in the second row Lb and the fourth row Ld are shifted by a half pitch in the X-axis direction with respect to the nozzle storage holes 31 in the first row La and the third row Lc. It has been arranged. The nozzles 21 are housed in the nozzle housing holes 31 in a state of being inserted from the tip side (lower end side). 4 and 5 show a state in which the nozzles 21 are stored only in some of the nozzle storage holes 31 for convenience.

  The shutter member 32 is a plate-like member. As shown in FIGS. 2 and 5, the shutter member 32 includes four members extending in the X-axis direction corresponding to the respective rows La to Ld of the nozzle housing holes 31. A slit 33 is formed. These slits 33 are a plurality of circular notches 34 having a slightly larger diameter than the large-diameter portion 21b of the nozzle 21 (the portion constituting the outermost peripheral portion of the nozzle 21), and a constant narrower than the large-diameter portion 21b. A plurality of narrow notches 35 having a width of 2 mm are arranged alternately in the X-axis direction, and the pitch of the circular notches 34 corresponds to the arrangement pitch of the nozzle housing holes 31 in the X-axis direction. is doing.

  The shutter member 32 is provided so as to be slidable in the X-axis direction, and is driven by an air cylinder (not shown). In response to the air supply / discharge switching with respect to the air cylinder, the shutter member 32 is shown in FIG. As shown in FIG. 2, each circular notch 34 of the slit 33 corresponds to the open position corresponding to the nozzle receiving hole 31 and each narrow notch 35 corresponds to the nozzle receiving hole 31 as shown in FIG. It is comprised so that it may displace to the closed position which does. In the state where the shutter member 32 is set to the open position (open state), as shown in FIG. 3A, the upper part of the nozzle storage hole 31 is opened through the circular notch 34, thereby the nozzle storage. While the nozzles 21 can be inserted into and removed from the holes 31, in the state where the shutter member 32 is set at the closed position (closed state), as shown in FIG. Covers the large-diameter portion 21b of the nozzle 21 so that the vertical movement of each nozzle 21 is restricted (prevented from coming off).

  As shown in FIG. 4, the nozzle holding unit 30 includes first to fourth nozzle sensors 40 a to 40 d for detecting the presence or absence of nozzles in the nozzle storage holes 31, and the rows La to Ld of the nozzle storage holes 31. It is provided corresponding to. Hereinafter, the first to fourth nozzle sensors 40a to 40d will be described. In this description, only the nozzle sensor 40a corresponding to the first row La (referred to as the first nozzle sensor 40a) will be described, and the second row Lb will be described. For the nozzle sensors 40b to 40d (referred to as second to fourth nozzle sensors 40b to 4d) corresponding to the fourth row Ld, the end of the reference numerals (alphabet display “a”) of the configuration of the first nozzle sensor 40a Detailed description will be omitted by changing to alphabetical representations “b” to “d” at the end of the column.

  The first nozzle sensor 40a is a transmissive optical sensor, and, as shown in FIG. 4, a single light projecting unit 41a composed of a light emitting source such as a light emitting diode (LED) and the light projecting unit 41a. A prism 42 a (corresponding to the spectroscopic means according to the present invention) that guides the light guide path 38 that passes through each nozzle housing hole 31 while splitting the irradiation light, and a phototransistor provided corresponding to each nozzle housing hole 31. A light receiving portion 43a composed of a light receiving element, etc., and the light emitted from the light projecting portion 41a is guided to each light guide path 38 and received by each light receiving portion 43a, and a signal corresponding to the light receiving level. Is output from each light receiving unit 43a to a controller on the mounting machine main body side (corresponding to the detecting means according to the present invention for detecting the presence or absence of a nozzle).

  More specifically, at positions corresponding to the respective nozzle storage holes 31 of the nozzle holding portion 30, they extend from the side surface side of the recess 30 a in the Y-axis direction and penetrate the nozzle storage holes 31 respectively. A light guide path 38 is formed on the side surface. As shown in FIG. 5 and FIG. 5, the prism 42a that is flat and elongated in the X-axis direction passes through the nozzle housing holes 31 of the first row La (hereinafter referred to as the first row). It is fixed to the nozzle holding part 30 in a state where it abuts against the side surface of the recess 30a so as to close the opening (the light introduction part) of each light guide path 38 of La.

  Each prism 42a has a staircase shape in plan view provided with reflection surfaces 44b (see FIG. 8) that reflect and disperse part of the light traveling in the X-axis direction in the Y-axis direction at locations corresponding to the light guide path 38, respectively. In addition to having a shape, a reflection surface 44a for reflecting light traveling in the Y-axis direction in the X-axis direction is provided at one end (right end in FIG. 4). One end (reflecting surface 44a) of the prism 42a is led out of the nozzle holding unit 30, and as shown in FIGS. 4 and 7, the light projecting unit 41a is configured to irradiate the one end with irradiation light. It is fixed to the holding part 30.

  The light receiving portions 43a are respectively arranged so as to face the openings on the outer side surface side of the nozzle holding portion 30 (light extraction portions) in each light guide path 38 of the first row La.

  That is, the first nozzle sensor 40a reflects the irradiation light from the light projecting unit 41a by the reflecting surface 44a of the prism 42a and travels in the X-axis direction, and further transmits this light to each prism 42a as shown in FIG. The light is sequentially reflected in the Y-axis direction by the reflecting surface 44b and guided to each light guide path 38 in the first row La, and received by the light receiving portion 43a (in FIG. 8, the first nozzle sensor). Only the progress of irradiation light at 40 is indicated by an arrow). In the state where the nozzle 21 is not present in the nozzle accommodation hole 31, the light introduced into the light guide path 38 is received by the light receiving portion 43 a, while in the state where the nozzle 21 is present in the nozzle accommodation hole 31, The introduced light is blocked by the nozzles 21 and a light receiving level signal corresponding to the presence or absence of the nozzles 21 is output from the light receiving units 43a to the controller. The presence or absence of the nozzle 21 in the storage hole 31 is detected.

  The light guides 38 corresponding to the first row La and the third row Lc and the light guides 38 corresponding to the second row Lb and the fourth row Ld are mutually in the vertical direction as shown in FIGS. It is offset. As for the first nozzle sensor 40a and the second nozzle sensor 40b, the prisms 42a and 42b are stacked on each other, and the projection of the first nozzle sensor 40a is applied to the prisms 42a and 42b as shown in FIG. It is the structure which irradiates light from the optical part 41a. That is, the light projecting portion 41a of the first nozzle sensor 40a is shared with the light projecting portion (41b) of the second nozzle sensor 40b. Similarly, for the third nozzle sensor 40c and the fourth nozzle sensor 40d, the prisms 42c and 42d are stacked on each other, and the light projecting unit 41c of the third nozzle sensor 40c is the light projecting unit of the fourth nozzle sensor 40d. (41d) is shared.

  As shown in FIG. 4, the light receiving portions 43 a and 43 b of the first nozzle sensor 40 a and the second nozzle sensor 40 b correspond to the light guide paths 38 in the first row La and the second row Lb, respectively. Are mounted on a common substrate 36a in a state of being alternately arranged, and are integrally fixed to a mounting portion 36 provided on a side portion of the nozzle holding portion 30 via the substrate 36a. The same applies to the light receiving portions 43c and 43d of the third nozzle sensor 40c and the second nozzle sensor 40d.

  In the nozzle replacement unit 19 configured as described above, the operations of the shutter member 32 and the mounting head 20 are controlled by the controller provided on the mounting machine body side, for example, the nozzle 21 as follows. The replacement work is proceeding.

  First, prior to the start of the mounting operation, the presence or absence of the nozzle 21 in each nozzle housing hole 31 according to the nozzle detection results (output signal levels from the light receiving portions 43a to 43d) by the first to fourth nozzle sensors 40a to 40d. A state is detected and the result is sent to the controller. Thereby, the nozzle presence / absence status (referred to as nozzle arrangement information) in each nozzle storage hole 31 is registered in the controller.

  When the mounting operation is started, the nozzle replacement is performed by disposing the mounting head 20 above the nozzle replacement unit 19 as necessary. Specifically, the mounting head 20 to be replaced with the nozzle is positioned above the empty space in the nozzle housing hole 31. Then, after the shutter member 32 is set to the open position (position shown in FIG. 2A), as shown in FIG. 3A, the mounting head 20 is lowered and the nozzle 21 at the tip of the mounting head 20 is stored in the nozzle. It is inserted into the hole 31. Next, when the shutter member 32 is switched to the closed position (the position shown in FIG. 2B), as shown in FIG. 3B, the large-diameter portion 21b of the nozzle 21 is moved to the shutter member 32 (the narrow notch portion). When the mounting head 20 is raised in that state, the nozzle 21 is separated from the mounting head 20 and left in the nozzle housing hole 31, and the nozzle 21 is removed. Complete.

  When the nozzle 21 is removed from the mounting head 20, a new nozzle 21 is next attached to the mounting head 20 according to the reverse operation to the above. That is, after the mounting head 20 is positioned above the nozzle storage hole 31 in which the nozzle 21 to be mounted is stored in the nozzle storage hole 31, the mounting head 20 is lowered and the shaft portion 20 a becomes the nozzle storage. While being inserted into the nozzle 21 in the hole 31, the leaf spring 20 b at the tip of the mounting head 20 is gradually expanded by the engaged portion 21 a of the nozzle 21. Then, in a state where the shaft portion 20 a is completely inserted into the nozzle 21, the engaged portion 21 a is elastically clamped by the leaf spring 20 b, so that the nozzle 21 is held at the tip of the mounting head 20. .

  Thereafter, the shutter member 32 is switched to the open state, and the mounting head 20 is raised in this state, so that the nozzle 21 is taken out from the nozzle housing hole 31 while being mounted on the mounting head 20, and the nozzle 21. The exchange is complete.

  When the nozzle is replaced, the presence / absence of the nozzle in the nozzle housing hole 31 in the nozzle replacement unit 19 changes, but detection from the first to fourth nozzle sensors 40a to 40d at a predetermined timing after the nozzle replacement. By outputting signals (signals from the light receiving units 43a to 43d) to the controller, data relating to the presence / absence state of the nozzle 21 is updated.

  As described above, in this nozzle replacement unit 19, the presence / absence of nozzles in each nozzle housing hole 31 is detected using the nozzle sensor 40a (to 40d), but the nozzle sensors 40a (to 40d) are common as described above. The light emitted from the light projecting portion 41 a (41 c) is guided to a plurality of light guide paths 38 corresponding to the nozzle housing holes 31, and the light is received by the light receiving sections 43 a provided for each light guide path 38. Since the light projecting portion 41a (40c) is made common to the plurality of nozzle housing holes 31 (light receiving portions 43a), the conventional device of this type, that is, the nozzle housing as a nozzle sensor. Compared with a nozzle replacement unit that detects the presence or absence of a nozzle using a light emitting unit and a light receiving unit for each hole, the space occupied by the nozzle sensor 40a (˜40d) is reduced. Theft is possible. Therefore, it is possible to arrange more nozzle storage holes 31 closer to each unit area, and as a result, it is possible to store the replacement nozzles 21 with higher density. In addition, since the light projecting unit 41a (41c) is shared by the plurality of light receiving units 43a (to 43d) as described above, the number of light projecting units can be reduced as compared with the prior art. There is also an advantage that the production cost can be reduced.

  In addition, as a structure of the nozzle sensors 40a-40d of the said nozzle replacement unit 19, what concerns on the 2nd-6th embodiment demonstrated below is applicable besides the thing of this embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only differences are described in detail. In the following description, only the first nozzle sensor 40a will be mainly described, and the other nozzle sensors 40b to 40d will be appropriately referred to as necessary.

<Second Embodiment>
Fig.9 (a) has shown the principal part of the nozzle exchange unit 19 which concerns on 2nd Embodiment.

  The first nozzle sensor 40a according to the second embodiment includes a spectral member 46a (corresponding to the spectral means according to the present invention) as shown in the figure instead of the prism 42a. Specifically, as shown in FIG. 9B, the spectroscopic member 46a has a cylindrical member 47 extending in the X-axis direction, and the cylindrical member 47 has a portion corresponding to each light guide path 38 in the X-axis direction. And a half mirror 48 for reflecting part of the light traveling in the Y-axis direction and reflecting the reflected light in the Y-axis direction, and a light guide opening for the reflected light.

  That is, the first nozzle sensor 40a reflects a part of the irradiation light from the light projecting unit 41a by each half mirror 48 of the spectroscopic member 46a and advances it in the Y-axis direction, thereby dispersing the irradiation light. It is configured to guide light to each light guide path 38 of the first row La and receive light by each light receiving portion 43a (in FIG. 9B, only the progress state of irradiation light in the first nozzle sensor 40 is indicated by an arrow. )

  Although only the first nozzle sensor 40a has been described here, the second to fourth nozzle sensors 40b to 40d have the same configuration. The spectral members 46a and 46b of the first and second nozzle sensors 40a and 40b are arranged in a stacked state, and the light projecting portion of the first nozzle sensor 40a is used as the light projecting portion (40b) of the second nozzle sensor 40b. 41a is commonly used, and the spectral members 46c and 46d of the third and fourth nozzle sensors 40c and 40d are arranged in a stacked state, and a third light projecting portion of the fourth nozzle sensor (40d) is provided. The point that the light projecting portion 41c of the nozzle sensor 40c is commonly used is the same as in the first embodiment.

<Third embodiment>
FIG. 10 shows a main part of the nozzle replacement unit 19 according to the third embodiment.

  The first nozzle sensor 40a according to the third embodiment includes an optical fiber group 50a (corresponding to the spectroscopic means according to the present invention) instead of the prism 42a according to the first embodiment. As shown in the figure, the optical fiber group 50a has a plurality of optical fibers 51, one end of which is fixed in the vicinity of the light projecting portion 41a and the other side is inserted into each light guide path 38 of the first row La. It is bound to

  That is, in the first nozzle sensor 40a, the irradiation light from the light projecting unit 41a is individually guided to each light guide path 38 of the first row La through the optical fiber 51, and is received by the corresponding light receiving unit 43a. (In FIG. 10, only the traveling state of light in the first nozzle sensor 40 is indicated by an arrow).

  Although only the first nozzle sensor 40a has been described here, the second to fourth nozzle sensors 40b to 40d have the same configuration. Further, the optical fiber groups 50a and 50b of the first and second nozzle sensors 40a and 40b are arranged in a stacked state, and the light projecting unit of the first nozzle sensor 40a is used as the light projecting unit (40b) of the second nozzle sensor 40b. 41a is commonly used, and the optical fiber groups 50c and 50d of the third and fourth nozzle sensors 40c and 40d are arranged in a stacked state, and a third light projecting unit of the fourth nozzle sensor (40d) The point that the light projecting portion 41c of the nozzle sensor 40c is used in common is the same as in the first embodiment.

  In the case of the configuration of the nozzle sensors 40a to 40d according to the second and third embodiments as described above, the light projecting unit 41a (41c) is shared by the plurality of light receiving units 43a (to 43d). Therefore, as in the first embodiment, this is advantageous in increasing the density of nozzle arrangement in the nozzle replacement unit 19 and reducing the production cost.

<Fourth embodiment>
FIG. 11 shows a main part of the nozzle replacement unit 19 according to the fourth embodiment.

  As shown in the figure, the first nozzle sensor 40a according to the fourth embodiment has a configuration in which the arrangement of the light projecting unit 41a and the light receiving unit 43a is switched in the first nozzle sensor 40a of the first embodiment. ing.

  That is, the first nozzle sensor 40a reflects the light irradiated from the light projecting portions 41a arranged in the mounting portion 36 into the light guide path 38 by the reflecting surface 44b of the prism 42a and travels in the X-axis direction. The light is reflected in the X-axis direction by the reflection surface 44a and received by the common light receiving portion 43a. Then, under the control of the controller, each light projecting unit 41a is turned on one by one in a predetermined order (in the illustrated example, from the right side), and light emitted from each light projecting unit 41a is sequentially received by the light receiving unit 43a. Thus, a signal corresponding to the received light level is output from the light receiving unit 43a to the controller, thereby detecting the presence or absence of the nozzle 21 in each nozzle housing hole 31.

  In the case of the fourth embodiment as described above, since the light projecting unit 43a is shared by the plurality of projecting units 41a, the space occupied by the first nozzle sensor 40a is reduced. Is advantageous. Therefore, similarly to the first embodiment, the nozzle replacement unit 19 can store the replacement nozzles 21 at a higher density. Further, since the light receiving unit 43a is made common, the same effect as that of the first embodiment can be obtained with the advantage that the production cost can be reduced.

  In the fourth embodiment, the controller corresponds to the detection means of the present invention that detects the presence or absence of a nozzle and corresponds to the sensor control means (the same applies to the fifth and sixth embodiments).

<Fifth Embodiment>
FIG. 12 shows a main part of the nozzle replacement unit 19 according to the fifth embodiment.

  As shown in the figure, the first nozzle sensor 40a according to the fifth embodiment has a configuration in which the arrangement of the light projecting unit 41a and the light receiving unit 43a is interchanged in the first nozzle sensor 40a of the second embodiment. ing.

  That is, the first nozzle sensor 40a irradiates light into the light guide path 38 from each light projecting portion 41a disposed on the attachment portion 36, and reflects this light with each corresponding half mirror 48 of the spectral member 46a. The light emitting unit 41a is controlled by the controller so that the light projecting units 41a are turned on one by one in a predetermined order after being configured to travel in the X-axis direction and be received by the common light receiving unit 43a. It is the composition to do.

<Sixth Embodiment>
FIG. 13 shows a main part of a nozzle replacement unit 19 according to the sixth embodiment.

  As shown in the figure, the first nozzle sensor 40a according to the sixth embodiment has a configuration in which the arrangement of the light projecting unit 41a and the light receiving unit 43a is switched in the first nozzle sensor 40a of the third embodiment. ing.

  That is, the nozzle sensor 40a is configured to guide the light irradiated to the light guide path 38 from each light projecting unit 41a to the common light receiving unit 43a through the optical fiber 51, and to receive the light. Each of the light projecting parts 41a is controlled to be turned on by the controller so that the parts 41a are turned on one by one in a predetermined order.

  In the case of the configuration of the nozzle sensor 40a according to the fifth and sixth embodiments as described above, since the light receiving unit 43a is shared by the plurality of light projecting units 41a, the configuration is the same as that of the fourth embodiment. In addition, this is advantageous in increasing the density of the nozzle arrangement in the nozzle replacement unit 19 and reducing the production cost.

  In the fourth to sixth embodiments described above, only the first nozzle sensor 40a has been described, but the second nozzle sensors 40b to 40d have the same configuration. Moreover, in these structures, as shown in FIGS. 11-13, the light projection part 41a of the 1st nozzle sensor 40a and the light projection part 41b of the 2nd nozzle sensor 40b are provided separately, and each is common. After being mounted on the substrate 36a, it is fixed to the mounting portion 36. On the other hand, the light receiving portion 43a of the first nozzle sensor 40a is commonly used as the light receiving portion 43b of the second nozzle sensor 40b. When detecting the presence / absence of a nozzle, in the illustrated example, the light projecting portions 41a and 41b are alternately lit in order from the right side, whereby detection by the first nozzle sensor 40a and detection by the second nozzle sensor 40b are alternately performed. To be done. This also applies to the third and fourth nozzle sensors 40c and 40d.

  The mounting machine described above is an example of a preferred embodiment of a surface mounting machine according to the present invention (a surface mounting machine on which the nozzle replacement device according to the present invention is mounted), and a nozzle replacement device (nozzle replacement unit 19). The specific configuration of the surface mounter can be changed as appropriate without departing from the scope of the present invention.

  For example, in the first to third embodiments, the light projecting portion 41a of the first nozzle sensor 40a is commonly used as the light projecting portion of the first and second nozzle sensors 40a and 40b. The light projecting unit 41c of the third nozzle sensor 40c is commonly used as the light projecting unit of the nozzle sensors 40c and 40d. However, the nozzle sensor 40a to 40d may include an independent light projecting unit. . In this case, for example, the light projecting unit 41a of the first nozzle sensor 40a and the light projecting unit 41b of the second nozzle sensor 40b are turned on with a time difference so that the detection by both the sensors 40a and 40b is performed with a time difference. Also good. In other words, if the light receiving parts 43a and 43b of both sensors 40a and 40b are too close, it is possible that both the light receiving parts 43a and 43b receive light at the same time, thereby causing a false detection. In this case, since the light receiving portions 43a and 43b receive light alternately, it is possible to avoid such inconveniences satisfactorily. This also applies to the third and fourth nozzle sensors 40c and 40d.

  Further, a specific configuration of the spectroscopic means of the present invention for guiding the irradiation light emitted from the common light projecting unit 41a (41c) to the plurality of light guide paths 38, and a plurality of light projecting units 41a (41d). The specific structure of the light guiding means of the present invention for guiding the irradiation light emitted from the light receiving portion 43a (43c) to the common light receiving portion 43a (43c) is not necessarily the configuration of the above embodiment (prisms 42a to 42d, spectral member 46a). The optical fiber group 50a) is not limited, and various configurations can be applied as long as the same function can be appropriately exhibited.

1 is a schematic plan view showing a surface mounter (first embodiment) according to the present invention. It is a schematic plan view showing a nozzle replacement unit ((a) shows an open state of the shutter member, and (b) shows a closed state of the shutter member). FIG. 4 is a schematic cross-sectional view showing a state of a nozzle replacement unit during a nozzle replacement operation ((a) shows a state where a nozzle at the tip of a mounting head is inserted into a nozzle housing hole, and (b) shows a state where the nozzle is removed from the mounting head. Each state). It is a plane sectional view showing composition (mainly nozzle sensor) of a nozzle exchange unit. It is sectional drawing (VV sectional drawing of FIG. 4) which shows the structure of a nozzle exchange unit. It is sectional drawing (VI-VI sectional drawing of FIG. 4) which shows the structure of a nozzle exchange unit. It is a side view which shows the structure of a nozzle exchange unit (A arrow line view of FIG. 4). It is a principal part enlarged view of FIG. 4 which shows the structure of a nozzle sensor. It is a plane sectional view ((a) is a general view and (b) is a principal part enlarged view) showing composition of a nozzle exchange unit concerning a 2nd embodiment. It is a plane sectional view (main part enlarged view) showing the composition of the nozzle exchange unit concerning a 3rd embodiment. It is a plane sectional view (main part enlarged view) showing the composition of the nozzle exchange unit concerning a 4th embodiment. It is a plane sectional view (main part enlarged view) showing the composition of the nozzle exchange unit concerning a 5th embodiment. It is a plane sectional view (main part enlarged view) showing the composition of the nozzle exchange unit concerning a 6th embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 19 Nozzle exchange unit 20 Mounting head 21 Nozzle 30 Nozzle holding part 31 Nozzle accommodation hole 32 Shutter member 40a-40d Nozzle sensor (1st nozzle sensor-4th nozzle sensor)
41a to 41d Emitting unit 42a to 42d Prism 43a to 43d Light receiving unit

Claims (10)

A nozzle changer comprising a nozzle holding portion having a plurality of storage holes into which replacement nozzles are detachably inserted, and an optical sensor for detecting the nozzles stored in the storage holes,
The optical sensor is provided corresponding to each light projecting unit, a spectroscopic unit that divides the irradiation light from the light projecting unit into light that traverses each housing hole in the radial direction, and each housing hole. And a plurality of light receiving portions that respectively receive light crossing the storage hole. In the nozzle exchange apparatus of Claim 1,
The spectroscopic means includes a plurality of reflecting portions arranged corresponding to the storage holes and arranged in the direction in which the storage holes are arranged, and radiates light from the light projecting portion and travels in the direction in which the storage holes are arranged. A nozzle exchange device characterized in that the irradiation light is dispersed by sequentially reflecting a part of the light from each reflecting portion. The nozzle replacement device according to claim 1,
The spectroscopic means is composed of a plurality of optical fibers that guide the irradiation light from the light projecting unit to the vicinity of the storage holes, respectively. In the nozzle exchange device according to any one of claims 1 to 3,
In the nozzle holding portion, a light guide path is formed that traverses each storage hole in the radial direction,
The light receiving section is disposed in a light deriving portion of each light guide path, and the spectroscopic means guides to the light introduction section of each light guide path while dispersing the irradiation light. . A nozzle exchange device comprising a nozzle holding portion having a plurality of storage holes into which replacement nozzles are detachably inserted, and an optical sensor for detecting the nozzles stored in the storage holes,
The optical sensor includes a light projecting unit provided corresponding to each housing hole, a light receiving unit that receives light from the light projecting unit, and a light receiving unit that is irradiated from each light projecting unit and crosses the housing hole. Light guiding means for guiding light to the light receiving unit,
A nozzle exchange device comprising: a sensor control unit that controls the optical sensor so that light is emitted from each of the light projecting units in a predetermined order when detecting the presence or absence of a nozzle in the storage hole. In the nozzle exchange device according to claim 5,
The light guide means includes a plurality of reflecting portions arranged in correspondence with the storage holes and arranged in the direction in which the storage holes are arranged, and reflects the light crossing the storage holes by the reflection portions, respectively. A nozzle exchange device characterized by guiding light to a light receiving part. In the nozzle exchange device according to claim 5,
The nozzle exchanging device according to claim 1, wherein the light guide means includes a plurality of optical fibers that respectively receive light crossing the storage holes and guide the light to the light receiving unit. In the nozzle exchange device according to any one of claims 5 to 7,
In the nozzle holding portion, a light guide path is formed that traverses each storage hole in the radial direction,
The light projecting unit is disposed at a light introducing portion of each light guide path, and the light guide means guides light derived from the light deriving portion of each light guide path to the light receiving unit. A nozzle exchange device characterized. In the nozzle exchange device according to claim 4 or 8,
The storage holes are arranged in a line in a uniaxial direction, and adjacent ones are alternately offset in a direction orthogonal to the uniaxial direction, and the light guides extend in the orthogonal direction, And a nozzle exchange device provided in parallel with each other. A component mounting nozzle is provided, a movable mounting head that mounts the component on the substrate by sucking the component by the nozzle, and a nozzle replacement device that replaces the nozzle with the mounting head. In surface mount machines,
The nozzle replacement device according to any one of claims 1 to 9 is provided as the nozzle replacement device, and in each of the storage holes based on a light reception state of the light receiving unit of the photosensor of the nozzle replacement device. A surface mounting machine comprising a detecting means for detecting the presence or absence of a nozzle.

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