JP4451284B2 - Nozzle storage structure and surface mounter in nozzle replacement unit - Google Patents

Description

  In the present invention, a mounting nozzle is detachably provided with a component suction nozzle, and can be replaced with a nozzle in a nozzle replacement unit disposed in a movable area of the head as necessary. In particular, the present invention relates to a nozzle housing structure when a nozzle for mounting a large component or connector is housed in a nozzle replacement unit.

  Conventionally, a mounting head movable between a component supply unit and a printed circuit board positioned at a predetermined work position has been provided, and a component suction nozzle attached to the lower end of the head is used to absorb the component from the component supply unit. A surface mounter for mounting on a printed circuit board is known.

  Further, in this type of surface mounting machine, the nozzle is detachably attached to the mounting head, and a nozzle station (nozzle replacement unit) containing the replacement nozzle is disposed in the movable area of the mounting head. In addition, there is also known one in which the nozzle is replaced during the mounting operation according to the type of the mounted component (for example, Patent Document 1).

Many of the nozzle stations are provided with nozzle housing holes, in which nozzles can be inserted and removed freely, and the nozzles are housed in the housing holes and attached to the mounting head. The nozzle housing hole is provided so that the nozzle is fitted, that is, the hole contour is formed so that the nozzle is housed in a state where the nozzle is positioned with reference to its outer shape (contour). When mounting the nozzle on the mounting head, the mounting head can be accurately positioned with respect to the nozzle.
JP 2002-246800 A

  The nozzle is generally cylindrical, but when adsorbing large parts or specially shaped parts, for example, a flat and wide tip having a plurality of adsorbing holes for adsorbing the outer edge of the part Large nozzles having a shape are often used.

  This type of large nozzle is also stored in the nozzle station in a replaceable manner. However, since this type of nozzle has a large outer edge size, the dimensional tolerance increases in both the nozzle and the nozzle storage hole. Therefore, in the conventional storage structure in which the nozzle is fitted in the nozzle storage hole and the nozzle is positioned based on the outer shape (contour), it is difficult to accurately position the nozzle. Therefore, it is required to solve this point.

  The present invention has been made to solve the above-described problem, and in particular, enables a large nozzle to be stored in a nozzle replacement unit in a state where the nozzle is accurately positioned, and through this, a nozzle for a mounting head. The purpose is to improve the reliability of desorption.

In order to solve the above-described problem, the nozzle storage structure in the nozzle storage unit of the present invention is configured such that a component suction nozzle is detachably provided on a movable head, and the nozzle replacement unit storing a replacement nozzle includes the nozzle replacement unit. The nozzle storage structure in the nozzle replacement unit of the surface mounter is provided in a movable region of the head and configured to replace the nozzle of the mounting head with a nozzle stored in the unit as necessary. Te, the nozzle exchange unit nozzle housing portion is provided, with the previous SL nozzle the nozzle housing portion to be received from the component suction surface side is constituted, for positioning of the nozzle in the Roh nozzle housing portion protrusions are provided for, the convex portion, when the nozzle is received in the nozzle housing portion, for supplying negative pressure for component suction Those that are configured to position the nozzle fitted into an opening formed in the nozzle in order (claim 1).

In this structure, the nozzle is positioned by fitting the negative pressure supply opening provided on the component suction surface side of the nozzle and the convex portion of the nozzle storage portion together. Therefore, positioning can be performed with high accuracy regardless of the size (outline) of the nozzle. In addition, since the positioning is performed using the negative pressure supply opening provided in the nozzle, the nozzle can be positioned with a reasonable configuration.

In this structure, the nozzle, the opening is provided in the position opposite to the above and the component suction surface side provided with a connecting portion to said head on the opposite side, and the connecting portion a component pickup side (Claim 2).

  According to this structure, since the connecting portion is positioned with high accuracy, it is possible to accurately position the head with respect to the nozzle when the nozzle is mounted.

Further, the Te structure odor, the nozzle has a plurality of said openings, said nozzle housing portion includes a plurality of pre Kitotsu portion fitted to each opening of the nozzle is provided (Claim 3).

According to this structure, the nozzle can be positioned more reliably and accurately. For example, when the cross-sectional shape of the nozzle opening and the convex part of the nozzle storage part is circular, if there is only one convex part, the nozzle may be rotated around the fitting part, but there are multiple nozzle openings. In this case, it is possible to prevent such rotational deviation by providing a plurality of convex portions.

On the other hand, in the surface mounter according to the present invention, a nozzle for component suction is detachably provided on a movable head, and a nozzle exchange unit that houses a replacement nozzle is provided in the movable region of the head. 4. The surface mounting machine configured such that the nozzle of the mounting head is replaced with a nozzle stored in the unit as needed, wherein the nozzle storage structure in the nozzle replacement unit is any one of claims 1 to 3 . those having a nozzle holder for a crab described (claim 4).

  According to this configuration, since the nozzle storage structure as described above is applied, in the nozzle replacement unit, it is possible to accurately position the nozzle in the nozzle storage portion regardless of the size (outline) of the nozzle. It becomes.

In this surface mounting machine, while the nozzle is provided so as to be able to be inserted and removed from the head, the nozzle replacement unit is provided so as to be movable between the operating position and the retracted position and set in the operating position. An engagement member that engages with a nozzle housed in the unit is provided, the nozzle mounted on the head is housed in the nozzle housing portion, and the engagement member is set to an operating position to move the head. In the configuration in which the nozzle is engaged with the engagement member to remove the nozzle from the head, the engaged portion of the nozzle with respect to the engagement member is It is preferable that it is provided in the vicinity of the connecting portion (claim 5 ).

More specifically, for example, when the tip of the nozzle is formed in a flat and slender shape and includes the connecting portion at the center in the longitudinal direction, the nozzle is further engaged with the engaging member. A pair of tongue pieces projecting on both sides perpendicular to the longitudinal direction at locations corresponding to the connecting portions as the parts, and the engaging members are respectively engaged with the tongue pieces at the operating position It is preferable to be constructed (claim 6 ).

  According to these configurations, since the load when the nozzle is removed from the mounting head acts on the substantially connecting portion, it is possible to remove the nozzle from the head smoothly and appropriately. That is, when a load is applied to a position away from the connecting portion when the nozzle is removed from the mounting head, a moment with the connecting portion serving as a fulcrum acts, which may hinder smooth removal of the nozzle. On the other hand, according to the above configuration, the nozzle removal load acts on the substantially connecting portion, so that the above-described moment does not occur and smooth nozzle removal is possible.

  According to the nozzle storage structure and surface mounter of the nozzle replacement unit according to the present invention as described above, even when a large nozzle having a flat and wide tip portion is stored in the nozzle replacement unit, for example, The nozzle can be accurately positioned. For this reason, it is possible to more reliably prevent troubles such as a misconnection between the head and the nozzle when the nozzle is taken out from the unit, and to improve the reliability of attaching and detaching the nozzle to the mounting head.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a surface mounter according to the present invention (a surface mounter to which a nozzle storage structure of a nozzle replacement unit according to the present invention is applied) in a plan view.

  In these drawings, a substrate conveying conveyor 2 is arranged on a base 1 of a surface mounting machine (hereinafter abbreviated as a mounting machine), and a printed board P is conveyed on the conveyor 2 to perform a predetermined mounting. It is stopped at the working position and is held by a substrate holding means such as a push-up pin (not shown). In the following description, the direction of the conveyor 2 is the X-axis direction, the direction orthogonal to the X-axis on the horizontal plane is the Y-axis direction, and the direction orthogonal to the X-axis and the Y-axis is the Z-axis direction. .

  On both sides of the conveyor 2 in the Y-axis direction, component supply units 3 and 4 for supplying electronic components to be mounted on the printed circuit board P are provided. Each component supply unit 3 and 4 includes a relatively small chip. A large number of tape feeders 3a and 4a suitable for supplying parts are arranged side by side in the X-axis direction. Further, a tray 4b on which components are further placed is arranged in the component supply section 4 on the front side (lower side in FIG. 1) with respect to the conveyor 2.

  Each of the tape feeders 3a and 4a is detachably mounted with a reel on which a tape on which small chip components such as ICs, transistors and capacitors are stored and held at predetermined intervals is wound. The tape is picked up by a head unit 5 (to be described later) while the tape is intermittently fed out to the leading component take-out portion. On the other hand, large special parts as will be described later are placed in an aligned manner on the tray 4b.

  Above the base 1, a component mounting head unit 5 is further provided. The head unit 5 is movable in the X-axis direction and the Y-axis direction within a certain region so that the components can be sucked from the component supply unit 4 and mounted on the printed circuit board P. That is, the support member 11 of the head unit 5 is arranged on the base 1 so as to be movable on the fixed rail 7 in the Y-axis direction, and the head unit 5 extends along the guide member 14 in the X-axis direction on the support member 11. It is supported so that it can move. The support member 11 is screwed to the ball screw 8 driven by the Y-axis servo motor 9 so that the support member 11 is moved in the Y-axis direction while being driven by the X-axis servo motor 15. When the head unit 5 is mounted on the ball screw 13, the head unit 5 is configured to move in the X-axis direction.

  The head unit 5 is mounted with a plurality of mounting heads 20 for picking up components and mounting them on the printed circuit board P. In this embodiment, the five mounting heads 20 are arranged in a line in the X-axis direction. It is mounted in the state where Of these mounting heads 20, the head 20 located at one end in the arrangement direction (the leftmost head 20 in FIG. 1) is a dedicated head for mounting a large component, and is slightly separated from the other heads 20. Is provided. In the following description, when it is particularly necessary to distinguish, the mounting head 20 for mounting a large component is referred to as a first head 20A, and the other mounting head 20 is referred to as a second head 20B. I will call it.

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

  A nozzle for component suction is provided at the tip of each mounting head 20, and when taking out the component from the tape feeder 4a, negative pressure is supplied from the negative pressure supply means (not shown) to the nozzle tip. Thus, the parts are sucked.

  The nozzle 21 (shown in FIG. 4) of the first head 20A is detachably attached to the head 20A, and can be replaced with another nozzle 21 having a different size as necessary. Yes. That is, the tip (lower end) of the first head 20A is provided with a shaft 20a for externally mounting the nozzle 21 and a pair of plate springs 20b for holding the nozzle, as shown in FIG. On the other hand, a cylindrical connecting portion 23 for the first head 20A is projected from the upper portion of the nozzle 21 (on the side opposite to the component suction surface). As shown in FIG. 2B, the connecting portion nozzle 21 of the nozzle 21 is externally fitted to the shaft portion 20a of the first head 20A, and the leaf spring 20b is attached to the connecting portion 23. The nozzle 21 is held at the tip of the first head 20A by being elastically engaged. Accordingly, when an external force larger than the elastic force of the leaf spring 20b is applied to the nozzle 21 mounted on the first head 20A in the nozzle pulling direction, the nozzle 21 is separated from the first head 20A. It has become. The configuration of the nozzle 21 will be described in detail later.

  Returning to FIG. 1, a component recognition camera 17 is provided on the base 1 for recognizing an image of the component suction state by each mounting head 20. The component recognition camera 17 is provided in each of the component supply units 3 and 4, and is fixed upward in a state in which the component extraction units at the tips of the tape feeders 3a and 4a are arranged. Thereby, after taking out the components from the tape feeders 3a and 4a, the suction unit of each mounting head 20 can be continuously imaged from the lower side only by moving the head unit 5 straight in the X-axis direction. Yes.

  On the base 1, a nozzle station 19 (corresponding to the nozzle replacement unit according to the present invention) is further provided on the side of the front-side component supply unit 4. The nozzle station 19 houses a replacement nozzle 21 for the first head 20A.

  Here, before describing the configuration of the nozzle station 19, a drawing is given of an example of the nozzle 21 mounted on the first head 20 </ b> A and a large special component (a component supplied by the tray 4 b) sucked by the nozzle 21. It explains using.

  FIG. 3 shows a large special part (hereinafter referred to as a special part) in a plan view, a front view, and a side view. As shown in the figure, the special component 30 has an elongated package 31, and extends from the center portion in the width direction (vertical direction in FIG. 3A) on the upper surface of the package 31 to both outer sides. In addition, a number of leads 34 arranged in the longitudinal direction of the package 31 are provided, and a plurality of pins 35 projecting directly below and arranged in the longitudinal direction are provided on the lower surface thereof. In addition, a pair of flat legs 32 are provided at both ends in the longitudinal direction of the package 31, the pins 35 are inserted into the holes on the board with respect to the printed board P, and the leads 34 and the legs 32 are placed on the board. It is designed to be mounted in contact with each land.

  FIG. 4 shows the nozzle 21 for sucking the special component 30 in a plan view, a front view, and a side view, respectively. As shown in the figure, the nozzle 21 has a flat main body portion 22 that is substantially rectangular in plan view and has a width and length corresponding to the special component 30. The connecting portion 23 for the first head 21 </ b> A protrudes from the upper surface of the main body portion 22 at the center position of the nozzle 21.

  On the other hand, a suction portion 24 for sucking the special component 30 is provided on the lower surface of the main body portion 22, that is, the component suction surface. The adsorbing portions 24 are provided in a state of being arranged in the width direction two by two at both longitudinal ends of the main body portion 22 and arranged corresponding to the leg portions 32 of the special component 30. A negative pressure supply passage 22a (see FIG. 8) formed inside the main body portion 22 and the connecting portion 23 opens at the tip (lower end) of each suction portion 24. That is, when the nozzle 21 is attached to the first head 20A, a negative pressure supply passage (not shown) formed inside the first head 20A communicates with the negative pressure supply passage 22a in the nozzle 21. Thus, the negative pressure for component suction is supplied to the suction portion 24 through both passages. Then, as shown in FIG. 5, the main part 22 is superposed on the package 31 of the special part 30, and the special parts 30 are sucked by sucking the legs 34 of the special parts 30 by the suction parts 24. It comes to hold.

  Returning to FIG. 4, the component suction surface side of the main body portion 22 and the opposite side of the connecting portion 23 (that is, the center position of the nozzle 21), and a position away from this position by a certain distance (FIG. 4) Positioning recesses 25 and 26 each having a circular cross section are provided at positions separated to the right in (a). These recesses 25 and 26 are for positioning the nozzle 21 when the nozzle 21 is housed in the nozzle station 19. Further, a pair of tongue pieces 27 protruding outward from the main body portion 22 are provided on the side surface of the main body portion 22 at locations corresponding to the nozzle center position. These tongue pieces 27 are for engaging the main body portion 22 with the shutter 50 described later in the nozzle station 19 when the nozzle 21 is separated from the first head 20A.

  In the mounting machine of the present embodiment, three types of nozzles 21 having different sizes, that is, longitudinal dimensions of the main body portion 21 are accommodated in the nozzle station 19 as the nozzle 21, and of these three types of nozzles 21. One is attached to the first head 20A.

  6 and 7 schematically show the configuration of the nozzle station 19 in a plan view and a longitudinal sectional view, respectively. As shown in these drawings, the nozzle station 19 includes a block-shaped nozzle holding portion 40 and a shutter 50 that slides along the upper surface thereof.

  The nozzle holder 40 is provided with a nozzle storage hole for storing the replacement nozzle 21 for the first head 20A. The nozzle housing holes are opened upward and are formed in a rectangular shape in plan view. In the illustrated example, the three nozzle housing holes 42A to 42C having different dimensions in the longitudinal direction for housing the three types of nozzles 21 are shown. Are arranged in parallel. The replacement nozzle 21 is inserted into the nozzle storage holes 42A to 42C from the component suction surface side and stored in a state in which the connecting portion 23 protrudes upward.

  As shown in FIG. 8, a support portion 43 that protrudes upward is provided at the inner bottom of each of the nozzle housing holes 42 </ b> A to 42 </ b> C, and the positioning corresponding to the positioning recesses 25 and 26 of the nozzle 21 is provided on this support portion 43. Pins 45 and 46 project upward. That is, when the nozzle 21 is stored in each of the nozzle storage holes 42A to 42C, the positioning pins 45 and 46 are inserted into the positioning recesses 25 and 26 of the nozzle 21, respectively. As shown in the figure, the nozzle portion is housed in a state where the central portion in the longitudinal direction of the main body portion 22 is supported by the support portion 43 and each suction portion 24 hangs down on both sides of the support portion 43. The nozzle 21 is accommodated in the holes 42A to 42C.

  The fitting tolerances of the recesses 25 and 26 and the pins 45 and 46 are set within a range in which the nozzle 21 can be taken in and out of the nozzle housing holes 42A to 42C without any trouble.

  Returning to FIG. 6, the shutter 50 is formed with rectangular through holes 51 corresponding to the nozzle housing holes 42 </ b> A to 42 </ b> C.

  The shutter 50 is provided so as to be slidable in the Y-axis direction along guide portions 40 a formed at both ends of the nozzle holding portion 40, and is driven by an air cylinder 55. Specifically, connecting plates 56 are assembled on the lower surface of the shutter 50 at both ends in the Y-axis direction, and these connecting plates 56 protrude downward through a notch 41 formed in the nozzle holding unit 40. The rods 55a and 55b of the double-acting air cylinder 55 which are provided in a state and are fixed to the lower surface of the nozzle holding portion 40 are connected to the connecting plates 56, respectively. As a result, the shutter 50 can advance and retreat in the Y-axis direction in accordance with the air supply / discharge switching with respect to the air cylinder 55.

  The shutter 50 is provided with a pair of engagement pieces 52 that project inward from the peripheral edge of the through hole 51 at the longitudinal center of each through hole 51. These engagement pieces 52 are retracted to the side of the tongue piece 27 of the nozzle 21 accommodated in the nozzle accommodation holes 42A to 42C as shown in FIG. 6 (b), the nozzle 21 is provided so as to be displaced to a position overlapping the tongue piece 27. As shown in FIG. That is, the state in which the engagement piece 52 is retracted to the side from the tongue piece 27 of the nozzle 21 is the open state of the shutter 50, and in this state, the entire storage portion of the nozzle 21 in each of the nozzle storage holes 42 </ b> A to 42 </ b> C. As a result, the nozzle 21 can be taken in and out. The state in which the engagement piece 52 overlaps the tongue piece 27 of the nozzle 21 is the closed state of the shutter 50. In this state, the tongue piece 27 of the nozzle 21 and the engagement piece 52 are accommodated in the vertical direction. As a result, the nozzle 21 can be replaced with the first head 20A as will be described in detail later. In this embodiment, the shutter 50 (engagement piece 52) corresponds to the engagement member according to the present invention, and the position shown in FIG. 6A is the retracted position of the engagement member, and FIG. The positions shown in FIG. 8 correspond to the operating positions of the engaging members.

  According to the above mounting machine, normally, the head unit 5 moves between the component supply units 3 and 4 and the printed circuit board P set at a predetermined work position, and the components are supplied by the nozzles of the respective mounting heads 20. The components are picked up from the parts 3 and 4 and conveyed onto the printed board P, and the components are mounted at predetermined positions on the board P. At this time, for the special component 30 supplied by the tray 4b, the component is picked up by the first head 20A, and for the chip component such as an IC supplied by the tape feeders 3a and 4a, the component is picked up by the second head 20B. The

  When mounting a special component 30 having a different size, the nozzle 21 mounted on the first head 20A is replaced with another nozzle 21 stored in the nozzle station 19, and the mounting of the component proceeds. It is done.

  In this case, nozzle replacement is performed as follows. First, the head unit 5 is disposed above the nozzle station 19 and is disposed above the nozzle housing holes 42A to 42C corresponding to the currently mounted nozzle 21. Then, after the shutter 50 of the nozzle station 19 is set to the open state, the nozzle 21 is inserted into the nozzle housing holes 42A to 42C as the first head 20A is lowered. When the nozzle 21 is inserted into the nozzle housing holes 42A to 42C in this way, as described above, the positioning pins 45 and 46 are inserted into the positioning recesses 25 and 26 of the nozzle 21, respectively, and the main body portion of the nozzle 21 is inserted. 22 is supported by the support portion 43, whereby the nozzle 21 is accommodated in the nozzle accommodating holes 42 </ b> A to 42 </ b> C while being positioned around the X axis direction, the Y axis direction, and the R axis.

  Then, after the shutter 50 is switched to the closed state, the first head 20A is raised. When the storage portion 20A is lifted in this way, the shutter 50 is closed and the engagement piece 52 of the shutter 50 overlaps above the tongue piece 27 of the nozzle 21 as shown in FIGS. 6B and 9. Accordingly, the tongue piece 27 and the engagement piece 52 are engaged in the vertical direction, and the removal of the nozzle 21 is prevented. As a result, the nozzle 21 is separated from the first head 20A and stored in the nozzle storage holes 42A to 42C.

  When the nozzle 21 is removed, another nozzle 21 is attached to the first head 20A in accordance with the reverse operation to the above. That is, after the first head 20A is set above the nozzle storage holes 42A to 42C in which the nozzles 21 to be mounted are stored, the head 20A descends. As a result, the nozzle 21 is attached to the tip of the first nozzle 20A. Specifically, when the first head 20 </ b> A is lowered, the shaft portion 20 a of the first head 20 </ b> A is inserted into the connecting portion 23 of the nozzle 21, while the leaf spring 20 b is pushed and expanded by the connecting portion 23 of the nozzle 21. When the shaft portion 20a is completely inserted into the nozzle 21, the connecting portion 23 is elastically held by the leaf spring 20b, whereby the nozzle 21 is held at the tip of the first head 20A. At this time, the nozzles 21 in the nozzle storage holes 42A to 42C are stored in a state of being positioned around the X-axis direction, the Y-axis direction, and the R-axis as described above. Insertion of the shaft portion 20a is performed satisfactorily.

  Then, after the shutter 50 is switched to the open state, the first head 20A is raised, so that the nozzle 21 is extracted from the nozzle housing holes 42A to 42C integrally with the head 20A, thereby replacing the nozzle 21. Will be completed.

  According to the mounting machine as described above, the large special component 30 supplied by the tray 4b can be well picked up by the nozzle 21 mounted on the first head 20A and mounted on the printed circuit board P. Since the nozzle 21 is detachably provided to the head 20A and can be replaced with another nozzle 21 having a different size stored in the nozzle station 19 as necessary, the size differs as the large special component 30. Things can be implemented well.

  For the nozzle station 19, the nozzle 21 is positioned around the X axis, the Y axis, and the R axis by the positioning structure as described above, so the large nozzle as described above that sucks the large special component 30. 21 can be stored in a state of being accurately positioned. Therefore, there is an advantage that the large special component 30 can be mounted while performing nozzle replacement appropriately and reliably.

  That is, the nozzle station 19 is provided with a nozzle housing hole having an outline equal to the outline of the main body portion 22 of the nozzle 21 as in the conventional nozzle station of this type, and the nozzle 21 is inserted into the nozzle station 19 by inserting the nozzle 21 therein. It is also conceivable to position the image on the basis of its contour (outer shape). However, in this configuration, when the size of the nozzle is increased, a dimensional error is likely to occur in both the nozzle 21 and the nozzle housing hole (the dimensional tolerance is increased), and the large nozzle that adsorbs the large special component 30 as described above. It becomes difficult to store 21 in a state in which 21 is positioned with high accuracy. On the other hand, according to the configuration in which the positioning recesses 25 and 26 are provided in the nozzle 21 and the positioning pins 45 and 46 are inserted therein as in the above embodiment, the outer shape (contour) of the nozzle 21 is obtained. ), The nozzle 21 can be positioned with a certain accuracy. Therefore, the large nozzle 21 as described above that adsorbs the large special component 30 can also be stored in the nozzle station 19 in a state of being accurately positioned. When the nozzle 21 is attached to the first head 20A, The shaft portion 20a of one head 20A and the connecting portion 23 of the nozzle 21 can be accurately opposed to each other. Therefore, it is possible to more reliably prevent troubles such as mounting mistakes of the nozzles 21, and as a result, it is possible to perform nozzle replacement more appropriately and reliably.

  Further, in the nozzle station 19, when the currently mounted nozzle 21 is separated from the first head 20A, the first head 20A is raised with the nozzle 21 inserted into the nozzle housing holes 42A to 42C, As a result, the nozzle 21 is engaged with the shutter 50. In this embodiment, as described above, the pair of tongue pieces 27 protruding from the main body portion 22 are provided on the side of the connecting portion 23 as described above. Since the shutter 50 (engagement piece 52) is engaged with this portion, the nozzle 21 can be reliably and smoothly separated. That is, for example, by sliding displacement of the shutter 50, a portion of the nozzle housing holes 42A to 42C on one end side in the longitudinal direction is closed, and thereby the shutter 50 can be engaged only on one end side in the longitudinal direction of the nozzle 21 (main body portion 22). Conceivable. However, in this case, since the engagement position of the shutter 50 with respect to the nozzle 21 is away from the connecting portion with the first head 20A, that is, the connecting portion 23, when the first head 20A is raised to separate the nozzle 21, As a result of the pulling load acting at a position away from the connecting portion 23, a moment acts with the connecting portion of the first head 20A and the nozzle 21 as a fulcrum, and smooth separation of the nozzle 21 may be hindered. On the other hand, according to the configuration in which the shutter 50 is engaged with the pair of tongue pieces 27 provided on both sides of the connecting portion 23 with the first head 20A as in the above embodiment, a downward pulling load is applied to the connecting portion 23. Therefore, the nozzle 21 can be separated from the first head 20A smoothly and promptly.

  Therefore, according to the surface mounting machine as described above, it is possible to improve the detachment reliability of the nozzle 21 with respect to the first head 20A, and appropriately and stably proceed with the mounting process of the large special component 30 as described above. The effect is that you will be able to.

  By the way, the mounting machine described above is one embodiment of the surface mounting machine according to the present invention (surface mounting machine to which the nozzle storage structure according to the present invention is applied), and the specific configuration thereof is the present invention. The present invention can be changed as appropriate without departing from the gist of the present invention.

  For example, in the embodiment, while the nozzle 21 is provided with the two positioning recesses 25 and 26, the nozzle housing holes 42A to 42C are provided with a pair of positioning pins 45 and 46 corresponding thereto. Are positioned around the R axis, and if possible, only one set of the positioning recesses 25 and the positioning pins 45 corresponding thereto may be used. That is, in the embodiment, since a positioning pin having a circular cross section is used, positioning of the nozzle 21 around the R axis is achieved by using two fitting locations. Therefore, when the cross-sectional shape of the positioning pin is a rectangle or a cross shape, the nozzle 21 can be positioned around the X axis, the Y axis, and the R axis even when there is only one fitting portion. In this case, only one set of positioning recesses for the nozzles 21 and positioning pins on the nozzle housing holes 42A to 42C side may be provided.

  In the embodiment, the positioning concave portion 25 is provided at a position corresponding to the connecting portion 23 in the main body portion 22 of the nozzle 21 (just on the opposite side of the connecting portion 23). Of course, if it is difficult to provide the positioning recess 25 at this position, the positioning recess 25 may be provided at a position other than this. However, in order to make the first head 20 </ b> A and the connecting portion 23 appropriately face each other when the nozzle is mounted, positioning is performed with reference to the connecting portion 23 by providing a positioning recess 25 at a position just opposite to the connecting portion 23. preferable.

  Further, if possible, the opening of the suction part 24 for supplying a negative pressure for part suction may be used as a positioning concave part in relation to the specific configuration of the nozzle 21. According to such a configuration, a rational configuration using the negative pressure supply opening as the recess is achieved. In this case, for example, in the case of the nozzle 21 provided with an opening for supplying negative pressure just on the opposite side of the connecting portion 23, if this opening is used as the concave portion, the nozzle 21 is positioned with reference to the connecting portion 23. Ideal because it can.

  Moreover, in the said embodiment, although the recessed part for positioning is provided in the nozzle 21 side and the positioning pin (convex part) is provided in the nozzle accommodation hole 42A-42C side, when there is no trouble in adsorption | suction of components, this is The reverse configuration may be adopted. That is, while providing the convex part for positioning in the component adsorption | suction surface side of the nozzle 21, you may comprise so that the recessed part which can be fitted to this convex part is provided in the nozzle accommodating hole 42A-42C side.

1 is a schematic plan view showing a surface mounter according to the present invention (a surface mounter to which a nozzle storage structure of a nozzle replacement unit according to the present invention is applied). It is a schematic side view which shows the attachment or detachment structure of the nozzle with respect to the mounting head (1st head). It is a figure which shows an example for large special parts ((a) is a top view of components, (b) is a front view, (c) is a side view). It is a figure which shows the nozzle for large special components with which a 1st head is mounted | worn ((a) is a side view of a nozzle, (b) is a bottom view, (c) is a side view). It is a front view which shows the state which adsorb | sucked the large special component with the nozzle. It is the plane schematic which shows a nozzle station ((a) shows the open state of a shutter, (b) shows the closed state of a shutter, respectively.) It is the sectional view on the AA line of Fig.6 (a) which shows a nozzle station. It is sectional drawing which shows a nozzle station and the nozzle accommodated in this. It is a BB sectional view of Drawing 6 (b) showing a nozzle station and a nozzle stored in this.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Head unit 19 Nozzle station 20 Mounting head 21 Nozzle 25,26 Positioning recessed part 30 Nozzle holding part 42A-42C Nozzle accommodation hole 45,46 Positioning pin 50 Shutter

Claims (6)

A nozzle for component suction is detachably provided on the movable head, and a nozzle replacement unit that houses a replacement nozzle is provided in the movable region of the head, and the nozzle of the mounting head is provided as necessary. The nozzle storage structure in the nozzle replacement unit of the surface mounter configured to be replaced with a nozzle stored in the unit,
The nozzle exchange unit nozzle housing portion is provided, together with the nozzle housing portion as before Symbol nozzle is accommodated from the component suction surface side is constructed, projections for positioning of the nozzle in the Roh nozzle housing portion parts is provided, the convex portion is fitted to the the nozzle is housed in the nozzle housing part, an opening formed in the nozzle to provide a negative pressure for component suction the A nozzle housing structure in a nozzle replacement unit, characterized in that the nozzle is positioned. In the nozzle storage structure in the nozzle replacement unit according to claim 1,
Said nozzle, said the component suction side of a connecting portion to said head on the opposite side, and the opening on the opposite side of the position and the connecting portion a component pickup side is provided The nozzle storage structure in the nozzle replacement unit characterized. In the nozzle storage structure in the nozzle replacement unit according to claim 1 or 2,
Nozzle the nozzle, has a plurality of said openings, that the nozzle housing portion, and a plurality of front Kitotsu portions respectively fitted into the opening of the nozzle is provided Nozzle storage structure in the replacement unit. A nozzle for component suction is detachably provided on the movable head, and a nozzle replacement unit that houses a replacement nozzle is provided in the movable area of the head, and the nozzle of the mounting head is provided as necessary. In a surface mounter configured to be replaced with a nozzle housed in the unit,
A surface mounting machine comprising the nozzle housing structure according to claim 1 as a nozzle housing structure in the nozzle replacement unit . In the surface mounting machine according to claim 4,
While the nozzle is provided so as to be detachable with respect to the head, the nozzle is provided in the nozzle replacement unit so as to be movable between the operating position and the retracted position, and is set in the operating position. An engaging member to be engaged is provided, and the nozzle mounted on the head is accommodated in the nozzle accommodating portion, and further, the engaging member is set at an operating position and the head is moved to engage with the nozzle. It is configured to engage the member and remove the nozzle from the head,
A surface mounter , wherein an engaged portion of the nozzle with respect to the engaging member is provided in the vicinity of a connecting portion of the nozzle with respect to the head . In the surface mounting machine according to claim 5,
The nozzle has a flat and slender tip and is provided with the connecting portion at the center in the longitudinal direction, and is further provided at a location corresponding to the connecting portion as an engaged portion with respect to the engaging member. A surface comprising a pair of tongue pieces projecting on both sides perpendicular to the longitudinal direction, wherein the engaging members are configured to engage with the tongue pieces in the operating position, respectively. Mounting machine.

Images