JP2009049125A - Electronic component mounting apparatus and mounting method - Google Patents

Abstract

An object of the present invention is to provide a mounting apparatus that efficiently mounts electronic components at a pitch larger than a maximum transport pitch by a clamper that transports a tape-shaped member.
A mounting unit that mounts electronic components on carrier members that are transported by clampers that transport carrier members, and a control device that controls driving of the clamper when electronic components are mounted on the carrier members. When mounting electronic components on the carrier member at a pitch larger than the maximum feed pitch of the clamper, the mounting pitch is P1, the maximum feed pitch of the carrier member by the conveying means is P2, and the difference between the mounting pitch P1 and the maximum feed pitch P2 If the shortage length of S is S, the controller drives the clamper from the initial position at a distance of either the shortage length S or the maximum feed pitch P2 to convey the carrier member, and then moves the clamper to the shortage length S. Then, the carrier member is moved by the clamper so that the transport distance from the beginning of the carrier member becomes the same as the mounting pitch P1. It is fed back to the initial position clamper from.
[Selection] Figure 3

Description

  The present invention relates to an electronic component mounting apparatus and mounting method for mounting an electronic component on a carrier member having a predetermined length made of resin or metal.

  When an electronic component is mounted on the carrier member, the carrier member is supported so as to be movable along the guide rail. The carrier member supported by the guide rail is conveyed by a predetermined pitch by a conveying means, and an electronic component is mounted on the carrier member by the mounting portion each time it is conveyed.

  The conveying means includes an openable / closable clamper that clamps both ends of the carrier member in the width direction, and a drive mechanism that reciprocally drives the clamper at a predetermined pitch. The drive mechanism has a screw shaft and a drive source that rotationally drives the screw shaft, and the screw shaft is screwed into a movable member integrally provided with the clamper. The movable member is provided so as to be movable in a predetermined direction, that is, along the longitudinal direction of the guide rail that supports the carrier member.

  Therefore, if the screw shaft is driven to rotate by holding both ends of the carrier member in the width direction by the clamper provided on the movable member, the clamper is driven together with the movable member. Can be sent. The prior art for conveying the carrier member in this way is disclosed in Patent Document 1.

  By the way, the maximum feed pitch of the clamper by the screw shaft is determined by a design condition such as a mounting pitch which is a size of the entire apparatus and a pitch interval of electronic components mounted on the carrier member by the apparatus.

  However, recently, due to diversification of products and the like, the mounting pitch of electronic components mounted on the carrier member may become larger than the maximum feed pitch of the carrier member by the clamper.

Conventionally, when the mounting pitch of the electronic components mounted on the carrier member is larger than the maximum feed pitch of the carrier member, first, after the carrier member is transported by driving the clamper in the initial position at the maximum feed pitch, the above-mentioned After returning the clamper to the initial position, the clamper is sent again for an insufficient distance, and the carrier member is transported at a predetermined pitch in total.
Japanese Patent No. 3768472

  By the way, the mounting operation for mounting the electronic component on the carrier member can be performed only after the carrier member is transported at the mounting pitch.

  However, in order to transport the carrier member at a pitch larger than the maximum feed pitch of the clamper, as described above, the clamper is driven at the maximum feed pitch from the initial position, and then returned to the initial position and then the insufficient distance is sent again. Then, before starting the mounting work to mount the electronic component on the carrier member, the carrier member transported at the maximum feed pitch must be returned by the maximum feed pitch, and then the insufficient distance must be transported. Can not be done.

  That is, after the carrier member is transported and before the electronic component is started to be mounted, the carrier member must be transported at the maximum feed pitch of the clamper and then returned to the initial position. For this reason, it takes time to return the clamper driven at the maximum feed pitch to the initial position, thereby increasing the tact time until the electronic component is mounted on the carrier member, and reducing the productivity.

  When mounting electronic components at a pitch larger than the maximum feed pitch of the conveying means for conveying the carrier member, the present invention shortens the time from the start of conveying the carrier member to mounting the electronic component, thereby improving productivity. It is an object of the present invention to provide a mounting apparatus and mounting method for an electronic component that can improve the above.

The present invention is an electronic component mounting apparatus for mounting electronic components on a carrier member at a predetermined pitch,
Conveying means for conveying the carrier member;
Mounting means for mounting the electronic components at the predetermined pitch on the carrier member conveyed by the conveying means;
Control means for controlling the driving of the conveying means when the electronic component is mounted on the carrier member by the mounting means to convey the carrier member,
When the electronic component is mounted on the carrier member at a pitch larger than the maximum feeding pitch of the conveying means, the mounting pitch of the electronic component is P1, the maximum feeding pitch of the carrier member by the conveying means is P2, and the mounting pitch P1 If the shortage of the difference between the maximum feed pitch P2 and P3 is P3,
The control means includes
After the carrier means is driven at a distance of either the shortage length P3 or the maximum feed pitch P2 from the initial position to carry the carrier member, the carrier means is returned by the shortage length P3, and then The carrier member is mounted on the carrier member while the carrier member is transported by the transporting means so that the transporting distance from the beginning of the carrier member is the same as the mounting pitch P1 and then the transporting means is returned to the initial position. The electronic component mounting apparatus is characterized in that the electronic component is mounted by means.

This invention is an electronic component mounting method for mounting an electronic component on a carrier member at a pitch larger than the maximum feed pitch of a conveying means for conveying the carrier member,
When the mounting pitch of the electronic component is P1, the maximum feed pitch of the carrier member by the conveying means is P2, and the insufficient length of the difference between the mounting pitch P1 and the maximum feed pitch P2 is P3,
A first step of conveying the carrier member from the initial position by the conveying means at a distance of either the short length P3 or the maximum feed pitch P2.
A second step of returning the conveying means by the shortage length P3 after the first step;
A third step of transporting the carrier member by the transport means so that the transport distance from the beginning of the carrier member is the same as the mounting pitch P1 after the second step;
In the electronic component mounting method, the method further includes a fourth step of returning the conveying means to the initial position after the third step and mounting the electronic component on the carrier member.

  It is preferable to include a step of starting mounting the electronic component on the carrier member while returning the conveying means to the initial position.

  According to the present invention, if the carrier member is conveyed by driving the carrier means for conveying the carrier member with either the maximum feed pitch or the insufficient length of the difference between the mounting pitch and the maximum feed pitch, the carrier means is After returning the short length, the carrier member is transported as much as the maximum feed pitch is insufficient.

  For this reason, in order to convey the carrier member at the mounting pitch, the conveying means only needs to return by the shortage length, so that the time required to convey and position the carrier member can be shortened and productivity can be improved.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a mounting device in which a first transport device 2 and a second transport device 3 are arranged in a row with a mounting portion 1 in between, and this mounting device is made of a synthetic resin or a metal plate as shown in FIG. An electronic component C such as a semiconductor chip can be mounted at a predetermined pitch on a carrier member W formed to have a predetermined length. The mounting pitch of the electronic component C is P1.

  The first transport device 2 transports the carrier member W supplied from the previous process to the mounting portion 1 as described later. The mounting unit 1 includes a backup tool 1a that receives the carrier member W transported and positioned by the first transport device 2, and a mounting tool that mounts the electronic component C on a portion of the carrier member W supported by the backup tool 1a. (Not shown). Then, the carrier member W on which the electronic component C is mounted is carried out to the next process by the second transport device 3.

  Next, the first transfer device 2 and the second transfer device 3 will be described. In addition, since the 1st, 2nd conveying apparatuses 2 and 3 are the same structures, one conveying apparatus is demonstrated. That is, each transport device 2, 3 has a rectangular base member 5. A pair of first linear guides 6 are provided on the upper surface of the base member 5 at a predetermined interval with respect to the transport direction of the carrier member W indicated by an arrow X in FIG. 1 and along a direction orthogonal to the transport direction. Yes.

  The pair of first linear guides 6 are provided with a pair of width direction movable members 7 by slidably engaging receiving members 7 a provided at both ends in the longitudinal direction of these lower surfaces. FIG. 2 is a plan view showing a pair of width direction movable members 7 provided on the base member 5. Nut bodies 8 a and 8 b are provided on the lower surface of the central portion in the longitudinal direction of each width direction movable member 7. One nut body 8a has a right female thread, and the other nut body 8b has a left female thread.

  A right male screw portion 9a and a left male screw portion 9b formed on a drive screw shaft 9 provided along the width direction of the base member 5 are respectively screwed into the pair of nut bodies 8a and 8b. One end of the drive screw shaft 9 is rotatably supported by a first support portion 11 erected at one end in the width direction of the base member 5, and the other end is provided at the other end in the width direction of the base member 5. The second support portion 12 is rotatably supported.

  The other end of the drive screw shaft 9 supported by the second support portion 12 is connected to the output shaft 14 a of the width adjusting drive source 14 via a coupling 13. As a result, when the width adjusting drive source 14 rotates the drive screw shaft 9 in the forward direction (right direction), the pair of width direction movable members 7 are driven away from each other via the pair of nut bodies 8a and 8b. If the drive screw shaft 9 is rotated in the reverse direction (left direction), the pair of width direction movable members 7 are driven in the approaching direction.

The width adjusting drive source 14, the drive screw shaft 9, and the pair of nut bodies 8a, 8b constitute a width direction drive mechanism that drives the pair of width direction movable members 7 in a contacting and separating direction.
A handle 15 is provided at one end of the drive screw shaft 9 supported by the first support portion 11. The drive screw shaft 9 can be manually rotated by the handle 15.

  On the upper surface of the pair of width direction movable members 7, as shown in FIG. 4, the second linear guide 18 is orthogonal to the first linear guide 6 and excludes one longitudinal end portion of the width direction movable member 7. It is provided over the entire length of the part. The second linear guide 18 is provided with a feed movable member 19 by slidably engaging a receiving member 19a provided on the lower surface thereof.

  A support member 21 is erected at one end portion in the longitudinal direction of the pair of width direction movable members 7. At the upper end of each support member 21, a guide rail 22 having an L-shaped engagement portion 22 a formed at a corner is provided along the same direction as the second linear guide 18. The carrier member W is supported by the engagement portions 22a of the pair of guide rails 22 by engaging both ends in the width direction, which is a direction intersecting the transport direction.

  The pair of movable movable members 19 have a substantially L-shaped side surface, and a ball spline shaft 23 is installed between the movable movable members 19. That is, one end of the ball spline shaft 23 is connected to an opening / closing drive source 25 provided on the outer surface of one feed movable member 19 and the other end is provided to the other feed movable member 19 as shown in FIG. The ball spline nut 24 is inserted and supported so as to be slidable in the axial direction.

  A first cam body 26 is fixedly provided at one end of the ball spline shaft 23, and a second cam body 27 connected to the ball spline nut 24 is provided at the other end together with the ball spline nut 24. The ball spline shaft 23 is slidably provided.

  In the first cam body 26 and the second cam body 27, the upper cams 26a and 27a and the lower cams 26b and 27b respectively shift the positions of the top dead center and the bottom dead center by 180 degrees in the circumferential direction. It is provided integrally.

  An upper cam follower 29 provided at one end of an L-shaped upper arm 28 is in contact with the outer peripheral surfaces of the upper cams 26a, 27a of the cam bodies 26, 27, respectively. An upper clamper 31 is provided at the other end of the upper arm 28. When the upper cam follower 29 is in contact with the top dead center of the upper cams 26a, 27a, the lower end of the upper clamper 31 is positioned slightly above the engaging portion 22a of the guide rail 22.

  A lower cam follower 34 provided at one end of an L-shaped lower arm 33 is in contact with the outer peripheral surfaces of the lower cams 26b, 27b of the cam bodies 26, 27, respectively. At the other end of the lower arm 33, there is provided a lower clamper 35 that constitutes a clamper mechanism with the upper clamper 31. When the lower cam follower 34 is in contact with the bottom dead center of the lower cams 26b, 27b, the upper end of the lower clamper 35 is positioned slightly below the engaging portion 22a of the guide rail 22, and the It faces the lower end of the upper clamper 31 via a predetermined interval.

  From this state, the ball spline shaft 23 is rotated and rotated 180 degrees by the opening / closing drive source 25, and when the cam bodies 26 and 27 are interlocked therewith, the upper clamper 31 is lowered and the lower clamper 35 is raised. The width direction both ends of the carrier member W engaged and supported by the engaging portion 22a of the guide rail 22 are clamped by 31 and 35. At this time, the carrier member W is lifted slightly from the engagement portion 22a and is sandwiched.

  The upper arm 28 and the lower arm 33 are supported by a support member 36 so as to be slidable in the vertical direction. Each support member 36 is attached and fixed to the movable movable member 19 by an attachment arm 37.

  As shown in FIGS. 1 and 3, the pair of left and right feed movable members 19 are connected by a connecting member 41. A nut body 42 is provided on the lower surface of the middle part of the connecting member 41 in the longitudinal direction. A feed screw shaft 43 is screwed onto the nut body 42. The feed screw shaft 43 is arranged with its axis parallel to the conveying direction of the carrier member W, and one end and the other end of the feed screw shaft 43 are a pair of support members 44 erected on the base member 5 as shown in FIG. Is rotatably supported.

  A driven pulley 45 is fitted to one end of the feed screw shaft 43 protruding from one support member 44. Below this driven pulley 45, a feed drive source 46 is provided. A drive pulley 47 is fitted to the output shaft 46 a of the feed drive source 46. A belt 48 is stretched between the driving pulley 47 and the driven pulley 45.

Accordingly, when the feed drive source 46 is operated and the feed screw shaft 43 is rotationally driven, the pair of feed movable members 19 connected by the connecting member 41 according to the rotational direction thereof is The carrier member W is driven in the feed direction of the carrier member W, which is a direction along the two linear guides 18.
The feed drive source 46, the feed screw shaft 43, the pair of pulleys 45 and 47, and the belt 48 are a feed drive mechanism that reciprocally drives the pair of feed movable members 19 along the carrier member W conveyance direction. Is configured.

  The drive of the width adjusting drive source 14, the opening / closing drive source 25, and the feed drive source 46 of the first and second transport devices 2 and 3 is controlled by the control device 50 shown in FIG. ing.

  In the mounting apparatus having such a configuration, when the carrier member W is supplied to the pair of guide rails 22 in which the upper clamper 31 and the lower clamper 35 are opened from the previous process to the first transport apparatus 2, The drive source 25 is operated to rotate the ball spline shaft 23 by 180 degrees.

  As a result, the upper clamper 31 and the lower clamper 35 are closed, so that both ends in the width direction of the carrier member W held by the guide rail 22 are sandwiched between the pair of left and right upper clampers 31 and the lower clamper 35.

  When both ends in the width direction of the carrier member W are sandwiched between the upper clamper 31 and the lower clamper 35, the feed drive source 46 is actuated to rotate the feed screw shaft 43 in a predetermined direction by a predetermined number of rotations. When the feed screw shaft 43 rotates, the pair of feed movable members 19 are driven toward the mounting portion 1 with a stroke corresponding to the number of rotations. Therefore, the feed screw shaft 43 is provided integrally with the feed movable member 19. The clamper 31 and the lower clamper 35 are interlocked. As a result, the carrier member W having both end portions in the width direction sandwiched and fixed between the upper clamper 31 and the lower clamper 35 is conveyed toward the mounting portion 1.

  When the carrier member W is transported with a predetermined stroke, the ball spline shaft 23 is driven to rotate 180 degrees, and the upper clamper 31 and the lower clamper 35 are opened. That is, the holding state of the carrier member W by the clampers 31 and 35 is released.

  Next, the feed drive source 46 rotationally drives the feed screw shaft 43 by a predetermined number of rotations in the direction opposite to the previous direction. As a result, the upper clamper 31 and the lower clamper 35 return by a predetermined stroke in the direction opposite to the conveying direction of the carrier member W. That is, the clampers 31 and 35 return to the initial positions.

  At the initial position, the ball spline shaft 23 is driven to rotate 180 degrees, the upper clamper 31 and the lower clamper 35 are closed, and both end portions in the width direction of the carrier member W are clamped and fixed by the clampers 31 and 35 again. It is repeated that the drive source 46 rotates the feed screw shaft 43 by a predetermined number of revolutions and conveys the carrier member W with a predetermined stroke.

  When the portion of the carrier member W on which the electronic component C is mounted is positioned on the backup tool (not shown) of the mounting portion 1, the mounting tool (not shown) that holds the electronic component C of the mounting portion 1 descends. The electronic component C is mounted on the carrier member W by being driven in the direction.

When the carrier member W on which the electronic component C is mounted in the mounting portion 1 is transported with a predetermined stroke, the tip end portion is held on the guide rail 22 of the second transport device 3. The carrier member W sent to the guide rail 22 of the second transport device 3 is transported with both end portions in the width direction being sandwiched between the upper clamper 31 and the lower clamper 35 of the second transport device 3, and the second Is transferred from the transfer device 3 to the next process.
As a result, the carrier member W supplied to the first transport device 2 can be transferred to the next process by the second transport device 3 after one electronic component C is mounted on the mounting portion 1.

  Note that the driving of the upper clamper 31 and the lower clamper 35 of the first transfer device 2 and the second transfer device 3 is controlled by the control device 50 so as to operate synchronously. As a result, the carrier member W transported by the first transport device 2 and mounted with the electronic component C in the mounting portion 1 is continuously transported by the second transport device 3.

  The maximum feed of the carrier member W that can be fed by the rotation of the feed screw shaft 43 driven by the feed drive source 46, the pitch of the electronic components C mounted on the carrier member W, that is, the mount pitch P1. If the pitch is P2, it may be required to feed the mounting pitch P1 and make the pitch larger than P2. The dimensional difference between P1 and P2 is defined as an insufficient length S due to the feeding drive source 46.

  As described above, when it is required to mount the electronic component C on the carrier tape W at the mounting pitch P1 larger than the feed pitch P2, the control drive 50 sets the feed drive source 46 in FIG. 6A or FIG. As shown in (b), the drive of the clampers 31 and 35 is controlled.

  In FIG. 6A, if the carrier member W is clamped by the clampers 31 and 35 at the conveyance start time t0, the carrier member W is conveyed by the shortage length S. This conveyance ends at time t1.

  When the carrier member W is conveyed by the shortage length S, the clampers 31 and 35 are opened. Let this end time be t2. Then, the clampers 31 and 35 are returned by the shortage length S which has been conveyed previously. This is indicated by -S in the figure. The end time at this time is t3.

  Next, at time t3 to t4, the clampers 31 and 35 are closed to sandwich the carrier member W, and the carrier member W is conveyed by a length that is insufficient for the mounting pitch P1. That is, the transport length at this time is P1−S = P2, and P2 is the maximum feed pitch of the carrier member W by the clampers 31 and 35. The completion time of this conveyance is set to t5.

  In this way, when the carrier member W is conveyed at the maximum mounting pitch P1 of the carrier member W by the clampers 31 and 35, the mounting portion 1 starts mounting the electronic component C on the carrier member W and at the same time the mounting pitch P1. The clampers 31 and 35 conveyed in step 1 are returned to the initial positions.

  That is, when the carrier member W is transported at a mounting pitch P1 larger than the maximum feed pitch P2 by the clampers 31 and 35, the length for returning the clampers 31 and 35 is a dimensional difference between the mounting pitch P1 and the feed pitch P2, which is an insufficient length. Only S.

  On the other hand, conventionally, as shown in FIG. 6C, after the carrier member W is conveyed at the maximum feed pitch P2, the clampers 31 and 35 are opened at time t11 to t12, and the clampers 31 and 35 at time t12 to t13. Is returned by a distance equal to the maximum feed pitch P2 (this distance is assumed to be -P2), then the clampers 31 and 35 are closed at time t14 to t15, and the carrier member W is transported for an insufficient length S that is insufficient for the mounting pitch P1. I was trying to do it.

  Therefore, the time during which the electronic component C can be mounted on the carrier member W is delayed by the length (P2-S) in which the clampers 31 and 35 are returned longer than t5 in FIG. Depending on the time difference, productivity is improved when the carrier member W is conveyed by the method shown in FIG.

  6A and 6C, each of the clampers 31 and 35 is opened and closed once, and the time required for the opening and closing is the same.

  In FIG. 6B, if the clampers 31 and 35 hold the carrier member W at time t0, the carrier member W is conveyed at the maximum feed pitch P2. Let the end time of this conveyance be ta. Then, if the clampers 31 and 35 are opened at time ta to tb, the clampers 31 and 35 are returned by an insufficient length S of the difference between the mounting pitch P1 and the maximum feed pitch P2. This is indicated by -S in the figure, and this end time is tc. Next, after closing the clampers 31 and 35 from time tc to td, the carrier member W is conveyed by the clampers 31 and 35 by the shortage length S, which is a length that is insufficient for the mounting pitch P1, from time td to te. The transfer is completed.

  According to such a conveyance system, the length for returning the clampers 31 and 35 until the carrier member W is conveyed at the mounting pitch P1 larger than the maximum feed pitch P2 is the same as in the case of FIG. This is only the shortage length S, which is a dimensional difference between the mounting pitch P1 and the feed pitch P2.

  Therefore, in this case as well, the distance for returning the clampers 31 and 35 is shorter than that in the conventional case of FIG. 6C, so that the productivity can be improved accordingly.

  As described above, when the carrier members W are transported by the clampers 31 and 35 at the mounting pitch P1 larger than the maximum feed pitch P2, the distance for returning the clampers 31 and 35 is made smaller than the conventional distance.

  That is, the clampers 31 and 35 having a distance corresponding to the maximum feed pitch P2 of the carrier member W are returned after the carrier member W is transported at the mounting pitch P1. Therefore, while the clampers 31 and 35 indicated by t5 to t6 and te to tf in FIGS. 6A and 6B are opened, and during the same time, the clampers 31 and 35 indicated by B return at a distance corresponding to the maximum feed pitch P2. In addition, the electronic component C can be mounted on the carrier member W.

  Therefore, the mounting start time of the electronic component C with respect to the carrier member W can be advanced by that much. That is, the tact time required for transporting and positioning the carrier member W and mounting the electronic component C can be shortened, and productivity can be improved.

The top view which shows schematic structure of the mounting apparatus of one embodiment of this invention. The top view which shows a pair of width direction adjustment member provided in the base member. The side view of a conveying apparatus. Sectional drawing of the conveying apparatus which shows the movable member for a feed provided in the width direction adjustment member, and a guide rail. The top view of the board | substrate with which an electronic component is mounted. Explanatory drawing of this invention and the conventional method of mounting an electronic component in a carrier member with a mounting pitch larger than the maximum conveyance pitch.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mounting part, 2 ... 1st conveying apparatus, 3 ... 2nd conveying apparatus, 14 ... Drive source for width adjustment, 25 ... Driving source for opening and closing, 31 ... Upper clamper, 35 ... Lower clamper, 43 ... For sending Screw shaft, 46 ... feeding drive source, 50 ... control device.

Claims (3)

An electronic component mounting apparatus for mounting electronic components on a carrier member at a predetermined pitch,
Conveying means for conveying the carrier member;
Mounting means for mounting the electronic components at the predetermined pitch on the carrier member conveyed by the conveying means;
Control means for controlling the driving of the conveying means when the electronic component is mounted on the carrier member by the mounting means to convey the carrier member,
When the electronic component is mounted on the carrier member at a pitch larger than the maximum feeding pitch of the conveying means, the mounting pitch of the electronic component is P1, the maximum feeding pitch of the carrier member by the conveying means is P2, and the mounting pitch P1 When the short length of the difference between the maximum feed pitch P2 and S is S,
The control means includes
After the conveying means is driven at a distance of either the short length S or the maximum feed pitch P2 from the initial position to convey the carrier member, the conveying means is returned by the short length S, and then An electronic component mounting apparatus, wherein the carrier member is conveyed by the conveying means so that the conveying distance from the beginning of the carrier member is the same as the mounting pitch P1, and then the conveying means is returned to an initial position. An electronic component mounting method for mounting an electronic component on a carrier member at a pitch larger than the maximum feed pitch of a conveying means for conveying the carrier member,
When the mounting pitch of the electronic component is P1, the maximum feed pitch of the carrier member by the transport means is P2, and the insufficient length of the difference between the mounting pitch P1 and the maximum feed pitch P2 is S,
A first step of conveying the carrier member from the initial position by the conveying means at a distance of either the short length S or the maximum feed pitch P2,
A second step of returning the conveying means by the shortage length P3 after the first step;
A third step of transporting the carrier member by the transport means so that the transport distance from the beginning of the carrier member is the same as the mounting pitch P1 after the second step;
And a fourth step of returning the conveying means to the initial position after the third step.   3. The electronic component mounting method according to claim 2, further comprising a step of starting mounting of the electronic component on the carrier member while returning the conveying means to the initial position.

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